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Cloth masks provide inferior protection vs. medical masks, suggests evidence review
according to an evidence review published Jan. 11 in Annals of Family Medicine.
Nevertheless, cloth masks may provide some degree of protection, filtration studies indicate. If clinicians use cloth masks, they should take into account the fit, material, and number of layers, the review authors wrote.
And if cloth masks are used as a last resort, such as during shortages of personal protective equipment (PPE), additional measures may help, such as pairing cloth masks with plastic face shields.
“We recommend frequent cloth mask changes to reduce the risk of moisture retention and washing according to hospital laundry standards to decrease the risk of ineffective cleaning,” review author Ariel Kiyomi Daoud, a researcher at the University of Colorado at Denver, Aurora, and colleagues wrote.
The investigators identified and analyzed nine studies related to cloth masks’ ability to prevent respiratory viral infections among health care clinicians. The studies generally were not specific to SARS-CoV-2. They focused on four nonrandomized trials, three laboratory efficacy studies, one single-case experiment, and one randomized controlled trial.
Filtration and fit
“Seven publications addressed the filtration efficacy of commercial cloth masks or materials used to create homemade masks ... in a laboratory setting,” the researchers wrote. These studies found that cloth materials prevent some level of penetration, but generally have “lesser filtration efficiency and greater variability than medical masks” do.
One study found that the materials with the greatest filtration efficacy – vacuum bags and tea towels – had low airflow, which limits their use.
Two studies found that additional layers may increase the viral filtration efficacy of cloth masks.
Several studies that assessed mask fit and airflow found that cloth masks “have worse fit and a greater level of particle leakage, compared to medical masks,” the authors reported. Most studies did not examine cloth masks’ ability to protect wearers from respiratory droplets or contact, which the World Health Organization consider the primary means of SARS-CoV-2 spread, with aerosols playing a smaller role. “Thus, we must interpret these results with caution in the context of COVID-19,” the authors wrote. “For a primary care clinician without access to medical masks, our qualitative synthesis of the literature suggests that it is better to wear a cloth mask than no mask,” as long as other protective measures are considered along with cloth mask use.
Generally consistent guidance
Agencies and researchers have shared similar recommendations about the use of cloth masks in health care settings.
“Health care workers are at the frontline and they need to be protected,” said Abrar Ahmad Chughtai, MBBS, MPH, PhD, an epidemiologist at University of New South Wales, Sydney, in an interview. “Many studies show that respirators are more effective, compared to medical masks, and medical masks are more effective, compared to cloth masks. So ideally, all frontline health care workers should use respirators. If respirators are not available, then medical masks should be used. Cloth masks are not as effective as medical masks and ideally should not be used in health care settings.”
Dr. Chughtai has written about cloth masks for protection against SARS-CoV-2 and was an investigator for a 2015 randomized trial that compared medical masks and cloth masks in health care workers.
In that trial, which was considered in the review, greater rates of influenza-like illness occurred in the cloth mask arm, compared with the medical mask arm.
“Studies show that three or more layers of cloth may reduce the spread of droplets and aerosols from the wearers,” Dr. Chughtai said. “So, cloth masks may be used in community settings to prevent spread of infections from the sick, particularly asymptomatic, people.”
In addition, cloth masks “may be used by health care workers as a last resort, if no other option is available,” he said. In that case, they should have at least three layers, fit to the face, and be washed regularly.
Not considered PPE
According to routine infection prevention and control recommendations for health care personnel from the Centers for Disease Control and Prevention, face masks – often referred to as surgical masks or procedure masks – should be worn by workers “at all times while they are in the healthcare facility, including in break rooms or other spaces where they might encounter coworkers.”
Unlike cloth masks, face masks offer “protection for the wearer against exposure to splashes and sprays of infectious material from others,” as well as source control, the agency says. Health care personnel “should remove their respirator or face mask, perform hand hygiene, and put on their cloth mask when leaving the facility at the end of their shift,” according to the CDC.
“Cloth masks are NOT PPE and should not be worn for the care of patients with suspected or confirmed COVID-19 or other situations where use of a respirator or face mask is recommended,” the agency notes.
When respirators or face masks are unavailable, health care personnel “might use cloth masks as a last resort for care of patients with suspected or confirmed diagnosis for which face mask or respirator use is normally recommended,” according to CDC guidance.
In that scenario, cloth masks “should ideally be used in combination with a face shield that covers the entire front (that extends to the chin or below) and sides of the face,” the CDC says.
Limited data for comparisons
A Dec. 29, 2020, update in Annals of Internal Medicine about masks for prevention of respiratory virus infections highlighted two recent studies in the United States that reported on mask use in health care settings. A study of more than 16,000 health care workers and first responders found that those who used an N95 or surgical mask all of the time were less likely to have SARS-CoV-2 antibodies, compared with workers who did not wear masks all the time. The adjusted odds ratio with consistent N95 use was 0.83, and the aOR with consistent surgical mask use was 0.86.
In the second study, which included more than 20,000 asymptomatic health care workers, risk for infection was reduced with any mask use versus no mask use (OR, 0.58). An N95 mask was associated with decreased risk versus a surgical mask (OR, 0.76). The studies had methodological limitations, however, and “evidence for various comparisons about mask use in health care settings and risk for SARS-CoV-2 remains insufficient,” the authors of the update wrote.
The Annals of Family Medicine review authors had no relevant disclosures. Dr. Chughtai has tested filtration of 3M masks and worked with CleanSpace Technology to research fit testing of respirators, and the 2015 randomized trial was funded by an Australian Research Council Linkage Grant with 3M as a partner on the grant. The Dec. 29, 2020, update was of a review that originally was supported by grants from the Agency for Healthcare Research Quality.
SOURCE: Daoud AK et al. Ann Fam Med. 2020 Jan 11. doi: 10.1370/afm.2640.
according to an evidence review published Jan. 11 in Annals of Family Medicine.
Nevertheless, cloth masks may provide some degree of protection, filtration studies indicate. If clinicians use cloth masks, they should take into account the fit, material, and number of layers, the review authors wrote.
And if cloth masks are used as a last resort, such as during shortages of personal protective equipment (PPE), additional measures may help, such as pairing cloth masks with plastic face shields.
“We recommend frequent cloth mask changes to reduce the risk of moisture retention and washing according to hospital laundry standards to decrease the risk of ineffective cleaning,” review author Ariel Kiyomi Daoud, a researcher at the University of Colorado at Denver, Aurora, and colleagues wrote.
The investigators identified and analyzed nine studies related to cloth masks’ ability to prevent respiratory viral infections among health care clinicians. The studies generally were not specific to SARS-CoV-2. They focused on four nonrandomized trials, three laboratory efficacy studies, one single-case experiment, and one randomized controlled trial.
Filtration and fit
“Seven publications addressed the filtration efficacy of commercial cloth masks or materials used to create homemade masks ... in a laboratory setting,” the researchers wrote. These studies found that cloth materials prevent some level of penetration, but generally have “lesser filtration efficiency and greater variability than medical masks” do.
One study found that the materials with the greatest filtration efficacy – vacuum bags and tea towels – had low airflow, which limits their use.
Two studies found that additional layers may increase the viral filtration efficacy of cloth masks.
Several studies that assessed mask fit and airflow found that cloth masks “have worse fit and a greater level of particle leakage, compared to medical masks,” the authors reported. Most studies did not examine cloth masks’ ability to protect wearers from respiratory droplets or contact, which the World Health Organization consider the primary means of SARS-CoV-2 spread, with aerosols playing a smaller role. “Thus, we must interpret these results with caution in the context of COVID-19,” the authors wrote. “For a primary care clinician without access to medical masks, our qualitative synthesis of the literature suggests that it is better to wear a cloth mask than no mask,” as long as other protective measures are considered along with cloth mask use.
Generally consistent guidance
Agencies and researchers have shared similar recommendations about the use of cloth masks in health care settings.
“Health care workers are at the frontline and they need to be protected,” said Abrar Ahmad Chughtai, MBBS, MPH, PhD, an epidemiologist at University of New South Wales, Sydney, in an interview. “Many studies show that respirators are more effective, compared to medical masks, and medical masks are more effective, compared to cloth masks. So ideally, all frontline health care workers should use respirators. If respirators are not available, then medical masks should be used. Cloth masks are not as effective as medical masks and ideally should not be used in health care settings.”
Dr. Chughtai has written about cloth masks for protection against SARS-CoV-2 and was an investigator for a 2015 randomized trial that compared medical masks and cloth masks in health care workers.
In that trial, which was considered in the review, greater rates of influenza-like illness occurred in the cloth mask arm, compared with the medical mask arm.
“Studies show that three or more layers of cloth may reduce the spread of droplets and aerosols from the wearers,” Dr. Chughtai said. “So, cloth masks may be used in community settings to prevent spread of infections from the sick, particularly asymptomatic, people.”
In addition, cloth masks “may be used by health care workers as a last resort, if no other option is available,” he said. In that case, they should have at least three layers, fit to the face, and be washed regularly.
Not considered PPE
According to routine infection prevention and control recommendations for health care personnel from the Centers for Disease Control and Prevention, face masks – often referred to as surgical masks or procedure masks – should be worn by workers “at all times while they are in the healthcare facility, including in break rooms or other spaces where they might encounter coworkers.”
Unlike cloth masks, face masks offer “protection for the wearer against exposure to splashes and sprays of infectious material from others,” as well as source control, the agency says. Health care personnel “should remove their respirator or face mask, perform hand hygiene, and put on their cloth mask when leaving the facility at the end of their shift,” according to the CDC.
“Cloth masks are NOT PPE and should not be worn for the care of patients with suspected or confirmed COVID-19 or other situations where use of a respirator or face mask is recommended,” the agency notes.
When respirators or face masks are unavailable, health care personnel “might use cloth masks as a last resort for care of patients with suspected or confirmed diagnosis for which face mask or respirator use is normally recommended,” according to CDC guidance.
In that scenario, cloth masks “should ideally be used in combination with a face shield that covers the entire front (that extends to the chin or below) and sides of the face,” the CDC says.
Limited data for comparisons
A Dec. 29, 2020, update in Annals of Internal Medicine about masks for prevention of respiratory virus infections highlighted two recent studies in the United States that reported on mask use in health care settings. A study of more than 16,000 health care workers and first responders found that those who used an N95 or surgical mask all of the time were less likely to have SARS-CoV-2 antibodies, compared with workers who did not wear masks all the time. The adjusted odds ratio with consistent N95 use was 0.83, and the aOR with consistent surgical mask use was 0.86.
In the second study, which included more than 20,000 asymptomatic health care workers, risk for infection was reduced with any mask use versus no mask use (OR, 0.58). An N95 mask was associated with decreased risk versus a surgical mask (OR, 0.76). The studies had methodological limitations, however, and “evidence for various comparisons about mask use in health care settings and risk for SARS-CoV-2 remains insufficient,” the authors of the update wrote.
The Annals of Family Medicine review authors had no relevant disclosures. Dr. Chughtai has tested filtration of 3M masks and worked with CleanSpace Technology to research fit testing of respirators, and the 2015 randomized trial was funded by an Australian Research Council Linkage Grant with 3M as a partner on the grant. The Dec. 29, 2020, update was of a review that originally was supported by grants from the Agency for Healthcare Research Quality.
SOURCE: Daoud AK et al. Ann Fam Med. 2020 Jan 11. doi: 10.1370/afm.2640.
according to an evidence review published Jan. 11 in Annals of Family Medicine.
Nevertheless, cloth masks may provide some degree of protection, filtration studies indicate. If clinicians use cloth masks, they should take into account the fit, material, and number of layers, the review authors wrote.
And if cloth masks are used as a last resort, such as during shortages of personal protective equipment (PPE), additional measures may help, such as pairing cloth masks with plastic face shields.
“We recommend frequent cloth mask changes to reduce the risk of moisture retention and washing according to hospital laundry standards to decrease the risk of ineffective cleaning,” review author Ariel Kiyomi Daoud, a researcher at the University of Colorado at Denver, Aurora, and colleagues wrote.
The investigators identified and analyzed nine studies related to cloth masks’ ability to prevent respiratory viral infections among health care clinicians. The studies generally were not specific to SARS-CoV-2. They focused on four nonrandomized trials, three laboratory efficacy studies, one single-case experiment, and one randomized controlled trial.
Filtration and fit
“Seven publications addressed the filtration efficacy of commercial cloth masks or materials used to create homemade masks ... in a laboratory setting,” the researchers wrote. These studies found that cloth materials prevent some level of penetration, but generally have “lesser filtration efficiency and greater variability than medical masks” do.
One study found that the materials with the greatest filtration efficacy – vacuum bags and tea towels – had low airflow, which limits their use.
Two studies found that additional layers may increase the viral filtration efficacy of cloth masks.
Several studies that assessed mask fit and airflow found that cloth masks “have worse fit and a greater level of particle leakage, compared to medical masks,” the authors reported. Most studies did not examine cloth masks’ ability to protect wearers from respiratory droplets or contact, which the World Health Organization consider the primary means of SARS-CoV-2 spread, with aerosols playing a smaller role. “Thus, we must interpret these results with caution in the context of COVID-19,” the authors wrote. “For a primary care clinician without access to medical masks, our qualitative synthesis of the literature suggests that it is better to wear a cloth mask than no mask,” as long as other protective measures are considered along with cloth mask use.
Generally consistent guidance
Agencies and researchers have shared similar recommendations about the use of cloth masks in health care settings.
“Health care workers are at the frontline and they need to be protected,” said Abrar Ahmad Chughtai, MBBS, MPH, PhD, an epidemiologist at University of New South Wales, Sydney, in an interview. “Many studies show that respirators are more effective, compared to medical masks, and medical masks are more effective, compared to cloth masks. So ideally, all frontline health care workers should use respirators. If respirators are not available, then medical masks should be used. Cloth masks are not as effective as medical masks and ideally should not be used in health care settings.”
Dr. Chughtai has written about cloth masks for protection against SARS-CoV-2 and was an investigator for a 2015 randomized trial that compared medical masks and cloth masks in health care workers.
In that trial, which was considered in the review, greater rates of influenza-like illness occurred in the cloth mask arm, compared with the medical mask arm.
“Studies show that three or more layers of cloth may reduce the spread of droplets and aerosols from the wearers,” Dr. Chughtai said. “So, cloth masks may be used in community settings to prevent spread of infections from the sick, particularly asymptomatic, people.”
In addition, cloth masks “may be used by health care workers as a last resort, if no other option is available,” he said. In that case, they should have at least three layers, fit to the face, and be washed regularly.
Not considered PPE
According to routine infection prevention and control recommendations for health care personnel from the Centers for Disease Control and Prevention, face masks – often referred to as surgical masks or procedure masks – should be worn by workers “at all times while they are in the healthcare facility, including in break rooms or other spaces where they might encounter coworkers.”
Unlike cloth masks, face masks offer “protection for the wearer against exposure to splashes and sprays of infectious material from others,” as well as source control, the agency says. Health care personnel “should remove their respirator or face mask, perform hand hygiene, and put on their cloth mask when leaving the facility at the end of their shift,” according to the CDC.
“Cloth masks are NOT PPE and should not be worn for the care of patients with suspected or confirmed COVID-19 or other situations where use of a respirator or face mask is recommended,” the agency notes.
When respirators or face masks are unavailable, health care personnel “might use cloth masks as a last resort for care of patients with suspected or confirmed diagnosis for which face mask or respirator use is normally recommended,” according to CDC guidance.
In that scenario, cloth masks “should ideally be used in combination with a face shield that covers the entire front (that extends to the chin or below) and sides of the face,” the CDC says.
Limited data for comparisons
A Dec. 29, 2020, update in Annals of Internal Medicine about masks for prevention of respiratory virus infections highlighted two recent studies in the United States that reported on mask use in health care settings. A study of more than 16,000 health care workers and first responders found that those who used an N95 or surgical mask all of the time were less likely to have SARS-CoV-2 antibodies, compared with workers who did not wear masks all the time. The adjusted odds ratio with consistent N95 use was 0.83, and the aOR with consistent surgical mask use was 0.86.
In the second study, which included more than 20,000 asymptomatic health care workers, risk for infection was reduced with any mask use versus no mask use (OR, 0.58). An N95 mask was associated with decreased risk versus a surgical mask (OR, 0.76). The studies had methodological limitations, however, and “evidence for various comparisons about mask use in health care settings and risk for SARS-CoV-2 remains insufficient,” the authors of the update wrote.
The Annals of Family Medicine review authors had no relevant disclosures. Dr. Chughtai has tested filtration of 3M masks and worked with CleanSpace Technology to research fit testing of respirators, and the 2015 randomized trial was funded by an Australian Research Council Linkage Grant with 3M as a partner on the grant. The Dec. 29, 2020, update was of a review that originally was supported by grants from the Agency for Healthcare Research Quality.
SOURCE: Daoud AK et al. Ann Fam Med. 2020 Jan 11. doi: 10.1370/afm.2640.
FROM ANNALS OF FAMILY MEDICINE
Long-Term Successful Treatment of Indolent Systemic Mastocytosis With Omalizumab
This case study suggests that omalizumab may help prevent anaphylaxis and reduce disease burden associated with systemic mastocytosis, but further studies and formal clinical trials are needed to confirm these findings.
Mastocytosis is a rare disease that causes allergic and anaphylactic symptoms due to chronic or episodic, excessive mast cell degranulation as well as mast cell infiltration of the skin or other organs.1 Mast cells aid in innate immunity by generation of a vasodilatory and inflammatory response and are significant contributors to allergic reactions. Cutaneous mastocytosis is defined by isolated skin involvement. Systemic mastocytosis (SM) is characterized by mast cell infiltration of extracutaneous organs, most often bone marrow.2
Background
SM is divided into distinct subtypes (Table 1). Nonadvanced SM subtypes include indolent SM and smoldering SM. These are the most common forms and tend to have more slowly progressing courses without evidence of organ tissue dysfunction, a myelodysplastic syndrome, or of a myeloproliferative disorder.3 Advanced SM is less common and is associated with organ tissue dysfunction. It also may be associated with myeloproliferative, myelodysplastic, or lymphoproliferative hematologic neoplasms, and subtypes include aggressive SM, SM with an associated hematologic neoplasm, and mast cell leukemia (Table 2).4
Treatment options approved by the US Food and Drug Administration (FDA) for advanced SM include disease-altering medications, such as tyrosine kinase inhibitors (eg, imatinib), but the approved treatment options for nonadvanced SM are generally aimed at managing only symptoms (Table 3). Although not approved by the FDA for the treatment of SM, omalizumab may aid in the prevention of anaphylaxis, the reduction of disease burden, and the improvement in quality of life for patients with SM.5 Omalizumab is a humanized monoclonal antibody against the Fc portion of immunoglobulin E (IgE). It is approved by the FDA for treatment of asthma as well as chronic idiopathic urticaria.6
Case Presentation
A 32-year-old female initially presented to Womack Army Medical Center at Fort Bragg, North Carolina, for evaluation due to recurrent episodes of anaphylaxis occurring 1 to 2 times per month as well as chronic skin rashes that progressed over the previous 5 years (Figure). She initially was diagnosed with idiopathic anaphylaxis and subsequently had multiple emergency department (ED) and clinic visits for vasovagal syncope, unexplained allergic reactions, dizziness, giddiness, and shortness of breath. More recently, she was diagnosed with idiopathic urticaria.
The patient reported at least 12 episodes in the previous year involving facial flushing that proceeded inferiorly, chest tightness, shortness of breath, labored breathing, crampy abdominal pain, and nausea without urticaria or significant pruritus. These bouts often were accompanied by mild facial angioedema, acute sinus pressure, vomiting, tachycardia, and lightheadedness. She reported experiencing brief losses of consciousness with at least 4 of these episodes. Home and ED blood pressure measurements revealed hypotension on several occasions with systolic readings in the 80s. She also developed nonpruritic freckles on her upper chest initially with subsequent increase in number and spread to involve her entire trunk, proximal extremities, and eventually distal extremities.
The patient had received intramuscular epinephrine several times, which led to rapid resolution of her symptoms. Intensive care unit admission for observation overnight was deemed necessary following one of her first episodes, but she did not require intubation or vasopressor support. Eventually, she began treating most episodes at home with diphenhydramine, ranitidine, and occasionally an epinephrine auto-injector, only presenting to the ED for severe dyspnea or loss of consciousness. Some episodes awoke her from sleeping but no triggers were identified (eg, foods, alcohol, supplements, medications, insect stings, latex exposure, exercise, strong emotions, or menstrual cycle).
Examination revealed hyperpigmented macules and papules scattered on the trunk and extremities, with a positive Darier sign. Punch biopsy of one of the macules revealed focal basal cell hyperpigmentation and sheets of benign-appearing mast cells in the superficial dermis, highlighted by CD117 immunohistochemical stain. A serum tryptase level was obtained and found to be significantly elevated (134 mcg/L). The patient was diagnosed with maculopapular cutaneous mastocytosis (urticaria pigmentosa).
A bone marrow biopsy revealed multiple prominent infiltrates of monomorphic, spindled, CD117-positive, CD2-positive, and CD25-positive mast cells arranged interstitially and paratrabecularly, with associated reticulin fibrosis. Indolent SM was diagnosed according to the World Health Organization classification system with multifocal, dense aggregates of mast cells (> 25%) in the bone marrow and with persistently elevated serum tryptase levels (134, 134, 151, and 159 ng/mL) without laboratory evidence of an associated clonal myeloid disorder or findings consistent with infiltrating bone lesions on full body magnetic resonance imaging scan.4
Despite maximal antihistamine and antileukotriene therapy with ranitidine (150 mg twice daily), cetirizine (10 mg twice daily), montelukast (10 mg daily), and cromolyn sodium (200 mg daily), the patient continued to experience recurrent episodes of anaphylaxis requiring subcutaneous epinephrine and systemic corticosteroids. In May 2016, the patient began a trial of off-label therapy with omalizumab injections (300 mg subcutaneous every 4 weeks). She has continued on therapy for more than 4 years and experienced only 1 anaphylactic episode. She also has had significant improvement in cutaneous symptoms.
Discussion
Mast cell overactivation and degranulation in mastocytosis is largely driven by the IgE antibody, which plays a significant role in atopic conditions, immediate hypersensitivity reactions, and anaphylaxis, as well as in the immunologic response to parasitic infections. The severity of atopic disease seems to be associated with serum IgE levels in many patients.7 IgE binding to surface receptors on mast cells and eosinophils prompts the release of toxic mediators, incites inflammation, and induces allergic symptoms.8 Activation of mast cells is classically elicited by IgE binding to the high-affinity Fcε RI receptor, the expression of which correlates with IgE levels.9
The anti-IgE, recombinant, humanized immunoglobulin G monoclonal antibody, omalizumab, decreases mastocytic and eosinophilic symptoms by binding and inhibiting IgE. This diminishes free IgE levels, inhibits IgE binding to the Fcε RI receptor, and affects downregulation of this high-affinity receptor on mast cells and basophils.6 Omalizumab is currently FDA approved only for the treatment of moderate-to-severe, persistent, allergic asthma that is not controlled by inhaled corticosteroids in patients aged ≥ 6 years, and for chronic idiopathic urticaria not controlled by H1 antihistamine therapy in patients aged ≥ 12 years.10 However, it stands to reason that this therapy also should be effective in the treatment of other poorly controlled atopic conditions, especially mastocytosis, the symptoms of which are driven by excessive mast cell degranulation and tissue infiltration.
As early as 2007, preliminary data showed that treatment with omalizumab could decrease the frequency of episodes of anaphylaxis.11 A National Institutes of Health case report followed 2 patients, one for 5 months and the other for 24 months. Both patients experienced a decrease in frequency of anaphylaxis following initiation of omalizumab. In 2010, a second case report described the treatment of an Australian patient with recurrent idiopathic anaphylaxis also diagnosed with SM. After initiation of treatment with omalizumab, she, too, experienced decreased frequency of episodes of anaphylaxis over 14 months.12 A review of patients treated at the Mastocytosis Centre Odense University Hospital in Denmark was published in 2017. Of 13 patients with SM treated with omalizumab, 5 experienced what was considered a complete response to the medication, with 3 each experiencing major and partial responses.5 The median treatment time in these patients was 27 months. Each of these cases showed significant promise in the use of omalizumab to treat SM, informing the decision to attempt this treatment in our patient.
The potential positive effects of omalizumab in reducing symptom severity in patients with SM was further supported by a 2017 meta-analysis. This review included several individual case reports noting that omalizumab could decrease frequency of pulmonary and gastrointestinal manifestations of SM.13 A small randomized control trial of omalizumab for treatment of mild symptoms of SM found improvement in disease severity, although neither primary nor secondary endpoints reached statistical significance.14
This case demonstrates a substantial, long-term, clinical benefit and quality of life improvement with omalizumab therapy in a patient with indolent SM that was not adequately controlled by conventional therapies. This is evidenced by an impressive decline in the frequency of mastocytic anaphylactic episodes as well as diminished patient-endorsed cutaneous symptoms.
This case provides further evidence of the efficacy of this therapy in diminishing disease burden for patients with SM who are otherwise limited to treatments aimed at transient symptomatic relief without significant alteration of the underlying cause of symptoms. At the time this article was written, our patient had now 52 months of continuous treatment without any adverse reactions noted, suggesting the treatment's long-term efficacy. It also adds to a small but growing body of literature that supports the use of anti-IgE therapy as a treatment option for improved management of this distressing, life-altering illness. Even in the time that our patient has been receiving omalizumab for SM, another small case series of 2 patients has been published showing sustained treatment effect at 12 years of therapy.15 This adds further insight that omalizumab can offer long-term, safe treatment for this limiting condition.
Omalizumab therapy is not without risk, but for patients afflicted by unrestrained mastocytic disease, the benefits may outweigh the risks. The most common significant risk with this medication is anaphylaxis, occurring in 1 to 2 per 1,000 patients, usually within 2 hours of an injection.16 This may correlate to the underlying degree of atopy in patients receiving omalizumab, and the risk of anaphylaxis is relatively low compared with that of many other biologic medications.17 Additionally, early data from initial phases of clinical trials indicated a potentially elevated malignancy risk with omalizumab. However, subsequent pooled analysis of larger numbers of patients has decreased suspicion that a causal relationship exists.18
Conclusions
Omalizumab has proven value in the treatment of atopic conditions, such as asthma and idiopathic urticaria, for which it has been approved for use by the FDA. Its effectiveness in significantly decreasing free serum IgE levels, and inhibiting IgE activation of mast cells makes it a possible treatment option for patients with SM who are not sufficiently controlled with conventional therapy. The findings in this case suggest that omalizumab may be effective in the prevention of anaphylaxis and in the reduction of disease burden associated with SM. Further studies and formal clinical trials are needed to confirm these findings. Patients should be counseled appropriately concerning the risks, benefits, and off-label status of this treatment option.
1. Theoharides TC, Valent P, Akin C. Mast cells, mastocytosis, and related disorders. N Engl J Med. 2015;373(2):163-172. doi:10.1056/NEJMra1409760
2. Valent P, Sperr WR, Schwartz LB, Horny H-P. Diagnosis and classification of mast cell proliferative disorders: delineation from immunologic diseases and non-mast cell hematopoietic neoplasms. J Allergy Clin Immunol. 2004;114(1):3-11. doi:10.1016/j.jaci.2004.02.045
3. Valent P, Sotlar K, Sperr WR, et al. Refined diagnostic criteria and classification of mast cell leukemia (MCL) and myelomastocytic leukemia (MML): a consensus proposal. Ann Oncol. 2014;25(9):1691-1700. doi:10.1093/annonc/mdu047
4. Valent P, Akin C, Metcalfe DD. Mastocytosis: 2016 updated WHO classification and novel emerging treatment concepts. Blood. 2017;129(11):1420-1427. doi:10.1182/blood-2016-09-731893
5. Broesby-Olsen S, Vestergaard H, Mortz CG, et al. Omalizumab prevents anaphylaxis and improves symptoms in systemic mastocytosis: Efficacy and safety observations. 2018;73(1):230-238. doi:10.1111/all.13237
6. Kaplan AP, Giménez-Arnau AM, Saini SS.Mechanisms of action that contribute to efficacy of omalizumab in chronic spontaneous urticaria. Allergy. 2017;72(4):519-533. doi:10.1111/all.13083
7. Borish L, Chipps B, Deniz Y, Gujrathi S, Zheng B, Dolan C; TENOR Study Group. Total serum IgE levels in a large cohort of patients with severe or difficult-to-treat asthma. Ann Allergy Asthma Immunol. 2005;95(3):247-253. doi:10.1016/S1081-1206(10)61221-5
8. Corry DB, Kheradmand F. Induction and regulation of the IgE response. Nature. 1999;402(suppl 6760):18-23. doi:10.1038/35037014
9. MacGlashan D, McKenzie-White J, Chichester K, et al. In vitro regulation of FcRIα expression on human basophils by IgE antibody. Blood. 1998;91(5):1633-1643.
10. XOLAIR [package insert]. East Hanover, NJ: Novartis Pharmaceuticals Corporation. Revised 2019. Accessed November 11, 2020. https://www.accessdata.fda.gov/drugsatfda_docs/label/2019/103976s5234lbl.pdf
11. Carter MC, Robyn JA, Bressler PB, Walker JC, Shapiro GC, and Metcalfe DD. Omalizumab for the treatment of unprovoked anaphylaxis in patients with systemic mastocytosis. J Allergy Clin Immunol. 2007;119(6):1550-1551. doi:10.1016/j.jaci.2007.03.032
12. Douglass JA, Carroll K, Voskamp A, Bourke P, Wei A, O’Hehir RE. Omalizumab is effective in treating systemic mastocytosis in a nonatopic patient. Allergy. 2010; 65(7):926-927. doi:10.1111/j.1398-9995.2009.02259.x
13. Le M, Miedzybrodzki B, Olynych T, Chapdelaine H, Ben-Shoshan M. Natural history and treatment of cutaneous and systemic mastocytosis. Postgrad Med. 2017;129(8):896-901. doi:10.1080/00325481.2017.1364124
14. Distler M, Maul J-T, Steiner T, et al. Efficacy of omalizumab in mastocytosis: allusive indication obtained from a prospective, double-blind, multicenter study (XOLMA Study) [published online ahead of print January 20, 2020]. Dermatology. doi:10.1159/000504842
15. Constantine G, Bressler P, Petroni D, Metcalfe D, Carter M. Twelve-year follow-up of omalizumab for anaphylaxis in 2 patients with systemic mastocytosis. J Allergy Clin Immunol Pract. 2019;7(4)1314-1316. doi:10.1016/j.jaip.2018.07.041
16. Fanta CH. Asthma. N Engl J Med. 2009;360(10):1002-1014. doi:10.1056/NEJMra0804579
17. Baldo BA. Adverse events to monoclonal antibodies used for cancer therapy: focus on hypersensitivity responses. Oncoimmunology. 2013;2(10):e26333. doi:10.4161/onci.26333
18. Busse W, Buhl R, Fernandez Vidaurre C, et al. Omalizumab and the risk of malignancy: results from a pooled analysis. J Allergy Clin Immunol. 2012;129(4):983-989.e6. doi:10.1016/j.jaci.2012.01.033.
19. Castells M, Akin C. Mastocytosis (cutaneous and systemic): epidemiology, pathogenesis, and clinical manifestations. Accessed December 8, 2020. Updated June 12, 2018. https://www.uptodate.com/contents/mastocytosis-cutaneous-and-systemic-epidemiology-pathogenesis-and-clinical-manifestations
20. Czarny J, Lange M, Lugowska-Umer H, Nowicki R. Cutaneous mastocytosis treatment: strategies, limitations, and perspectives. Postepy Dermatol Alergol. 2018;35(6):541-545. doi:10.5114/ada.2018.77605
This case study suggests that omalizumab may help prevent anaphylaxis and reduce disease burden associated with systemic mastocytosis, but further studies and formal clinical trials are needed to confirm these findings.
This case study suggests that omalizumab may help prevent anaphylaxis and reduce disease burden associated with systemic mastocytosis, but further studies and formal clinical trials are needed to confirm these findings.
Mastocytosis is a rare disease that causes allergic and anaphylactic symptoms due to chronic or episodic, excessive mast cell degranulation as well as mast cell infiltration of the skin or other organs.1 Mast cells aid in innate immunity by generation of a vasodilatory and inflammatory response and are significant contributors to allergic reactions. Cutaneous mastocytosis is defined by isolated skin involvement. Systemic mastocytosis (SM) is characterized by mast cell infiltration of extracutaneous organs, most often bone marrow.2
Background
SM is divided into distinct subtypes (Table 1). Nonadvanced SM subtypes include indolent SM and smoldering SM. These are the most common forms and tend to have more slowly progressing courses without evidence of organ tissue dysfunction, a myelodysplastic syndrome, or of a myeloproliferative disorder.3 Advanced SM is less common and is associated with organ tissue dysfunction. It also may be associated with myeloproliferative, myelodysplastic, or lymphoproliferative hematologic neoplasms, and subtypes include aggressive SM, SM with an associated hematologic neoplasm, and mast cell leukemia (Table 2).4
Treatment options approved by the US Food and Drug Administration (FDA) for advanced SM include disease-altering medications, such as tyrosine kinase inhibitors (eg, imatinib), but the approved treatment options for nonadvanced SM are generally aimed at managing only symptoms (Table 3). Although not approved by the FDA for the treatment of SM, omalizumab may aid in the prevention of anaphylaxis, the reduction of disease burden, and the improvement in quality of life for patients with SM.5 Omalizumab is a humanized monoclonal antibody against the Fc portion of immunoglobulin E (IgE). It is approved by the FDA for treatment of asthma as well as chronic idiopathic urticaria.6
Case Presentation
A 32-year-old female initially presented to Womack Army Medical Center at Fort Bragg, North Carolina, for evaluation due to recurrent episodes of anaphylaxis occurring 1 to 2 times per month as well as chronic skin rashes that progressed over the previous 5 years (Figure). She initially was diagnosed with idiopathic anaphylaxis and subsequently had multiple emergency department (ED) and clinic visits for vasovagal syncope, unexplained allergic reactions, dizziness, giddiness, and shortness of breath. More recently, she was diagnosed with idiopathic urticaria.
The patient reported at least 12 episodes in the previous year involving facial flushing that proceeded inferiorly, chest tightness, shortness of breath, labored breathing, crampy abdominal pain, and nausea without urticaria or significant pruritus. These bouts often were accompanied by mild facial angioedema, acute sinus pressure, vomiting, tachycardia, and lightheadedness. She reported experiencing brief losses of consciousness with at least 4 of these episodes. Home and ED blood pressure measurements revealed hypotension on several occasions with systolic readings in the 80s. She also developed nonpruritic freckles on her upper chest initially with subsequent increase in number and spread to involve her entire trunk, proximal extremities, and eventually distal extremities.
The patient had received intramuscular epinephrine several times, which led to rapid resolution of her symptoms. Intensive care unit admission for observation overnight was deemed necessary following one of her first episodes, but she did not require intubation or vasopressor support. Eventually, she began treating most episodes at home with diphenhydramine, ranitidine, and occasionally an epinephrine auto-injector, only presenting to the ED for severe dyspnea or loss of consciousness. Some episodes awoke her from sleeping but no triggers were identified (eg, foods, alcohol, supplements, medications, insect stings, latex exposure, exercise, strong emotions, or menstrual cycle).
Examination revealed hyperpigmented macules and papules scattered on the trunk and extremities, with a positive Darier sign. Punch biopsy of one of the macules revealed focal basal cell hyperpigmentation and sheets of benign-appearing mast cells in the superficial dermis, highlighted by CD117 immunohistochemical stain. A serum tryptase level was obtained and found to be significantly elevated (134 mcg/L). The patient was diagnosed with maculopapular cutaneous mastocytosis (urticaria pigmentosa).
A bone marrow biopsy revealed multiple prominent infiltrates of monomorphic, spindled, CD117-positive, CD2-positive, and CD25-positive mast cells arranged interstitially and paratrabecularly, with associated reticulin fibrosis. Indolent SM was diagnosed according to the World Health Organization classification system with multifocal, dense aggregates of mast cells (> 25%) in the bone marrow and with persistently elevated serum tryptase levels (134, 134, 151, and 159 ng/mL) without laboratory evidence of an associated clonal myeloid disorder or findings consistent with infiltrating bone lesions on full body magnetic resonance imaging scan.4
Despite maximal antihistamine and antileukotriene therapy with ranitidine (150 mg twice daily), cetirizine (10 mg twice daily), montelukast (10 mg daily), and cromolyn sodium (200 mg daily), the patient continued to experience recurrent episodes of anaphylaxis requiring subcutaneous epinephrine and systemic corticosteroids. In May 2016, the patient began a trial of off-label therapy with omalizumab injections (300 mg subcutaneous every 4 weeks). She has continued on therapy for more than 4 years and experienced only 1 anaphylactic episode. She also has had significant improvement in cutaneous symptoms.
Discussion
Mast cell overactivation and degranulation in mastocytosis is largely driven by the IgE antibody, which plays a significant role in atopic conditions, immediate hypersensitivity reactions, and anaphylaxis, as well as in the immunologic response to parasitic infections. The severity of atopic disease seems to be associated with serum IgE levels in many patients.7 IgE binding to surface receptors on mast cells and eosinophils prompts the release of toxic mediators, incites inflammation, and induces allergic symptoms.8 Activation of mast cells is classically elicited by IgE binding to the high-affinity Fcε RI receptor, the expression of which correlates with IgE levels.9
The anti-IgE, recombinant, humanized immunoglobulin G monoclonal antibody, omalizumab, decreases mastocytic and eosinophilic symptoms by binding and inhibiting IgE. This diminishes free IgE levels, inhibits IgE binding to the Fcε RI receptor, and affects downregulation of this high-affinity receptor on mast cells and basophils.6 Omalizumab is currently FDA approved only for the treatment of moderate-to-severe, persistent, allergic asthma that is not controlled by inhaled corticosteroids in patients aged ≥ 6 years, and for chronic idiopathic urticaria not controlled by H1 antihistamine therapy in patients aged ≥ 12 years.10 However, it stands to reason that this therapy also should be effective in the treatment of other poorly controlled atopic conditions, especially mastocytosis, the symptoms of which are driven by excessive mast cell degranulation and tissue infiltration.
As early as 2007, preliminary data showed that treatment with omalizumab could decrease the frequency of episodes of anaphylaxis.11 A National Institutes of Health case report followed 2 patients, one for 5 months and the other for 24 months. Both patients experienced a decrease in frequency of anaphylaxis following initiation of omalizumab. In 2010, a second case report described the treatment of an Australian patient with recurrent idiopathic anaphylaxis also diagnosed with SM. After initiation of treatment with omalizumab, she, too, experienced decreased frequency of episodes of anaphylaxis over 14 months.12 A review of patients treated at the Mastocytosis Centre Odense University Hospital in Denmark was published in 2017. Of 13 patients with SM treated with omalizumab, 5 experienced what was considered a complete response to the medication, with 3 each experiencing major and partial responses.5 The median treatment time in these patients was 27 months. Each of these cases showed significant promise in the use of omalizumab to treat SM, informing the decision to attempt this treatment in our patient.
The potential positive effects of omalizumab in reducing symptom severity in patients with SM was further supported by a 2017 meta-analysis. This review included several individual case reports noting that omalizumab could decrease frequency of pulmonary and gastrointestinal manifestations of SM.13 A small randomized control trial of omalizumab for treatment of mild symptoms of SM found improvement in disease severity, although neither primary nor secondary endpoints reached statistical significance.14
This case demonstrates a substantial, long-term, clinical benefit and quality of life improvement with omalizumab therapy in a patient with indolent SM that was not adequately controlled by conventional therapies. This is evidenced by an impressive decline in the frequency of mastocytic anaphylactic episodes as well as diminished patient-endorsed cutaneous symptoms.
This case provides further evidence of the efficacy of this therapy in diminishing disease burden for patients with SM who are otherwise limited to treatments aimed at transient symptomatic relief without significant alteration of the underlying cause of symptoms. At the time this article was written, our patient had now 52 months of continuous treatment without any adverse reactions noted, suggesting the treatment's long-term efficacy. It also adds to a small but growing body of literature that supports the use of anti-IgE therapy as a treatment option for improved management of this distressing, life-altering illness. Even in the time that our patient has been receiving omalizumab for SM, another small case series of 2 patients has been published showing sustained treatment effect at 12 years of therapy.15 This adds further insight that omalizumab can offer long-term, safe treatment for this limiting condition.
Omalizumab therapy is not without risk, but for patients afflicted by unrestrained mastocytic disease, the benefits may outweigh the risks. The most common significant risk with this medication is anaphylaxis, occurring in 1 to 2 per 1,000 patients, usually within 2 hours of an injection.16 This may correlate to the underlying degree of atopy in patients receiving omalizumab, and the risk of anaphylaxis is relatively low compared with that of many other biologic medications.17 Additionally, early data from initial phases of clinical trials indicated a potentially elevated malignancy risk with omalizumab. However, subsequent pooled analysis of larger numbers of patients has decreased suspicion that a causal relationship exists.18
Conclusions
Omalizumab has proven value in the treatment of atopic conditions, such as asthma and idiopathic urticaria, for which it has been approved for use by the FDA. Its effectiveness in significantly decreasing free serum IgE levels, and inhibiting IgE activation of mast cells makes it a possible treatment option for patients with SM who are not sufficiently controlled with conventional therapy. The findings in this case suggest that omalizumab may be effective in the prevention of anaphylaxis and in the reduction of disease burden associated with SM. Further studies and formal clinical trials are needed to confirm these findings. Patients should be counseled appropriately concerning the risks, benefits, and off-label status of this treatment option.
Mastocytosis is a rare disease that causes allergic and anaphylactic symptoms due to chronic or episodic, excessive mast cell degranulation as well as mast cell infiltration of the skin or other organs.1 Mast cells aid in innate immunity by generation of a vasodilatory and inflammatory response and are significant contributors to allergic reactions. Cutaneous mastocytosis is defined by isolated skin involvement. Systemic mastocytosis (SM) is characterized by mast cell infiltration of extracutaneous organs, most often bone marrow.2
Background
SM is divided into distinct subtypes (Table 1). Nonadvanced SM subtypes include indolent SM and smoldering SM. These are the most common forms and tend to have more slowly progressing courses without evidence of organ tissue dysfunction, a myelodysplastic syndrome, or of a myeloproliferative disorder.3 Advanced SM is less common and is associated with organ tissue dysfunction. It also may be associated with myeloproliferative, myelodysplastic, or lymphoproliferative hematologic neoplasms, and subtypes include aggressive SM, SM with an associated hematologic neoplasm, and mast cell leukemia (Table 2).4
Treatment options approved by the US Food and Drug Administration (FDA) for advanced SM include disease-altering medications, such as tyrosine kinase inhibitors (eg, imatinib), but the approved treatment options for nonadvanced SM are generally aimed at managing only symptoms (Table 3). Although not approved by the FDA for the treatment of SM, omalizumab may aid in the prevention of anaphylaxis, the reduction of disease burden, and the improvement in quality of life for patients with SM.5 Omalizumab is a humanized monoclonal antibody against the Fc portion of immunoglobulin E (IgE). It is approved by the FDA for treatment of asthma as well as chronic idiopathic urticaria.6
Case Presentation
A 32-year-old female initially presented to Womack Army Medical Center at Fort Bragg, North Carolina, for evaluation due to recurrent episodes of anaphylaxis occurring 1 to 2 times per month as well as chronic skin rashes that progressed over the previous 5 years (Figure). She initially was diagnosed with idiopathic anaphylaxis and subsequently had multiple emergency department (ED) and clinic visits for vasovagal syncope, unexplained allergic reactions, dizziness, giddiness, and shortness of breath. More recently, she was diagnosed with idiopathic urticaria.
The patient reported at least 12 episodes in the previous year involving facial flushing that proceeded inferiorly, chest tightness, shortness of breath, labored breathing, crampy abdominal pain, and nausea without urticaria or significant pruritus. These bouts often were accompanied by mild facial angioedema, acute sinus pressure, vomiting, tachycardia, and lightheadedness. She reported experiencing brief losses of consciousness with at least 4 of these episodes. Home and ED blood pressure measurements revealed hypotension on several occasions with systolic readings in the 80s. She also developed nonpruritic freckles on her upper chest initially with subsequent increase in number and spread to involve her entire trunk, proximal extremities, and eventually distal extremities.
The patient had received intramuscular epinephrine several times, which led to rapid resolution of her symptoms. Intensive care unit admission for observation overnight was deemed necessary following one of her first episodes, but she did not require intubation or vasopressor support. Eventually, she began treating most episodes at home with diphenhydramine, ranitidine, and occasionally an epinephrine auto-injector, only presenting to the ED for severe dyspnea or loss of consciousness. Some episodes awoke her from sleeping but no triggers were identified (eg, foods, alcohol, supplements, medications, insect stings, latex exposure, exercise, strong emotions, or menstrual cycle).
Examination revealed hyperpigmented macules and papules scattered on the trunk and extremities, with a positive Darier sign. Punch biopsy of one of the macules revealed focal basal cell hyperpigmentation and sheets of benign-appearing mast cells in the superficial dermis, highlighted by CD117 immunohistochemical stain. A serum tryptase level was obtained and found to be significantly elevated (134 mcg/L). The patient was diagnosed with maculopapular cutaneous mastocytosis (urticaria pigmentosa).
A bone marrow biopsy revealed multiple prominent infiltrates of monomorphic, spindled, CD117-positive, CD2-positive, and CD25-positive mast cells arranged interstitially and paratrabecularly, with associated reticulin fibrosis. Indolent SM was diagnosed according to the World Health Organization classification system with multifocal, dense aggregates of mast cells (> 25%) in the bone marrow and with persistently elevated serum tryptase levels (134, 134, 151, and 159 ng/mL) without laboratory evidence of an associated clonal myeloid disorder or findings consistent with infiltrating bone lesions on full body magnetic resonance imaging scan.4
Despite maximal antihistamine and antileukotriene therapy with ranitidine (150 mg twice daily), cetirizine (10 mg twice daily), montelukast (10 mg daily), and cromolyn sodium (200 mg daily), the patient continued to experience recurrent episodes of anaphylaxis requiring subcutaneous epinephrine and systemic corticosteroids. In May 2016, the patient began a trial of off-label therapy with omalizumab injections (300 mg subcutaneous every 4 weeks). She has continued on therapy for more than 4 years and experienced only 1 anaphylactic episode. She also has had significant improvement in cutaneous symptoms.
Discussion
Mast cell overactivation and degranulation in mastocytosis is largely driven by the IgE antibody, which plays a significant role in atopic conditions, immediate hypersensitivity reactions, and anaphylaxis, as well as in the immunologic response to parasitic infections. The severity of atopic disease seems to be associated with serum IgE levels in many patients.7 IgE binding to surface receptors on mast cells and eosinophils prompts the release of toxic mediators, incites inflammation, and induces allergic symptoms.8 Activation of mast cells is classically elicited by IgE binding to the high-affinity Fcε RI receptor, the expression of which correlates with IgE levels.9
The anti-IgE, recombinant, humanized immunoglobulin G monoclonal antibody, omalizumab, decreases mastocytic and eosinophilic symptoms by binding and inhibiting IgE. This diminishes free IgE levels, inhibits IgE binding to the Fcε RI receptor, and affects downregulation of this high-affinity receptor on mast cells and basophils.6 Omalizumab is currently FDA approved only for the treatment of moderate-to-severe, persistent, allergic asthma that is not controlled by inhaled corticosteroids in patients aged ≥ 6 years, and for chronic idiopathic urticaria not controlled by H1 antihistamine therapy in patients aged ≥ 12 years.10 However, it stands to reason that this therapy also should be effective in the treatment of other poorly controlled atopic conditions, especially mastocytosis, the symptoms of which are driven by excessive mast cell degranulation and tissue infiltration.
As early as 2007, preliminary data showed that treatment with omalizumab could decrease the frequency of episodes of anaphylaxis.11 A National Institutes of Health case report followed 2 patients, one for 5 months and the other for 24 months. Both patients experienced a decrease in frequency of anaphylaxis following initiation of omalizumab. In 2010, a second case report described the treatment of an Australian patient with recurrent idiopathic anaphylaxis also diagnosed with SM. After initiation of treatment with omalizumab, she, too, experienced decreased frequency of episodes of anaphylaxis over 14 months.12 A review of patients treated at the Mastocytosis Centre Odense University Hospital in Denmark was published in 2017. Of 13 patients with SM treated with omalizumab, 5 experienced what was considered a complete response to the medication, with 3 each experiencing major and partial responses.5 The median treatment time in these patients was 27 months. Each of these cases showed significant promise in the use of omalizumab to treat SM, informing the decision to attempt this treatment in our patient.
The potential positive effects of omalizumab in reducing symptom severity in patients with SM was further supported by a 2017 meta-analysis. This review included several individual case reports noting that omalizumab could decrease frequency of pulmonary and gastrointestinal manifestations of SM.13 A small randomized control trial of omalizumab for treatment of mild symptoms of SM found improvement in disease severity, although neither primary nor secondary endpoints reached statistical significance.14
This case demonstrates a substantial, long-term, clinical benefit and quality of life improvement with omalizumab therapy in a patient with indolent SM that was not adequately controlled by conventional therapies. This is evidenced by an impressive decline in the frequency of mastocytic anaphylactic episodes as well as diminished patient-endorsed cutaneous symptoms.
This case provides further evidence of the efficacy of this therapy in diminishing disease burden for patients with SM who are otherwise limited to treatments aimed at transient symptomatic relief without significant alteration of the underlying cause of symptoms. At the time this article was written, our patient had now 52 months of continuous treatment without any adverse reactions noted, suggesting the treatment's long-term efficacy. It also adds to a small but growing body of literature that supports the use of anti-IgE therapy as a treatment option for improved management of this distressing, life-altering illness. Even in the time that our patient has been receiving omalizumab for SM, another small case series of 2 patients has been published showing sustained treatment effect at 12 years of therapy.15 This adds further insight that omalizumab can offer long-term, safe treatment for this limiting condition.
Omalizumab therapy is not without risk, but for patients afflicted by unrestrained mastocytic disease, the benefits may outweigh the risks. The most common significant risk with this medication is anaphylaxis, occurring in 1 to 2 per 1,000 patients, usually within 2 hours of an injection.16 This may correlate to the underlying degree of atopy in patients receiving omalizumab, and the risk of anaphylaxis is relatively low compared with that of many other biologic medications.17 Additionally, early data from initial phases of clinical trials indicated a potentially elevated malignancy risk with omalizumab. However, subsequent pooled analysis of larger numbers of patients has decreased suspicion that a causal relationship exists.18
Conclusions
Omalizumab has proven value in the treatment of atopic conditions, such as asthma and idiopathic urticaria, for which it has been approved for use by the FDA. Its effectiveness in significantly decreasing free serum IgE levels, and inhibiting IgE activation of mast cells makes it a possible treatment option for patients with SM who are not sufficiently controlled with conventional therapy. The findings in this case suggest that omalizumab may be effective in the prevention of anaphylaxis and in the reduction of disease burden associated with SM. Further studies and formal clinical trials are needed to confirm these findings. Patients should be counseled appropriately concerning the risks, benefits, and off-label status of this treatment option.
1. Theoharides TC, Valent P, Akin C. Mast cells, mastocytosis, and related disorders. N Engl J Med. 2015;373(2):163-172. doi:10.1056/NEJMra1409760
2. Valent P, Sperr WR, Schwartz LB, Horny H-P. Diagnosis and classification of mast cell proliferative disorders: delineation from immunologic diseases and non-mast cell hematopoietic neoplasms. J Allergy Clin Immunol. 2004;114(1):3-11. doi:10.1016/j.jaci.2004.02.045
3. Valent P, Sotlar K, Sperr WR, et al. Refined diagnostic criteria and classification of mast cell leukemia (MCL) and myelomastocytic leukemia (MML): a consensus proposal. Ann Oncol. 2014;25(9):1691-1700. doi:10.1093/annonc/mdu047
4. Valent P, Akin C, Metcalfe DD. Mastocytosis: 2016 updated WHO classification and novel emerging treatment concepts. Blood. 2017;129(11):1420-1427. doi:10.1182/blood-2016-09-731893
5. Broesby-Olsen S, Vestergaard H, Mortz CG, et al. Omalizumab prevents anaphylaxis and improves symptoms in systemic mastocytosis: Efficacy and safety observations. 2018;73(1):230-238. doi:10.1111/all.13237
6. Kaplan AP, Giménez-Arnau AM, Saini SS.Mechanisms of action that contribute to efficacy of omalizumab in chronic spontaneous urticaria. Allergy. 2017;72(4):519-533. doi:10.1111/all.13083
7. Borish L, Chipps B, Deniz Y, Gujrathi S, Zheng B, Dolan C; TENOR Study Group. Total serum IgE levels in a large cohort of patients with severe or difficult-to-treat asthma. Ann Allergy Asthma Immunol. 2005;95(3):247-253. doi:10.1016/S1081-1206(10)61221-5
8. Corry DB, Kheradmand F. Induction and regulation of the IgE response. Nature. 1999;402(suppl 6760):18-23. doi:10.1038/35037014
9. MacGlashan D, McKenzie-White J, Chichester K, et al. In vitro regulation of FcRIα expression on human basophils by IgE antibody. Blood. 1998;91(5):1633-1643.
10. XOLAIR [package insert]. East Hanover, NJ: Novartis Pharmaceuticals Corporation. Revised 2019. Accessed November 11, 2020. https://www.accessdata.fda.gov/drugsatfda_docs/label/2019/103976s5234lbl.pdf
11. Carter MC, Robyn JA, Bressler PB, Walker JC, Shapiro GC, and Metcalfe DD. Omalizumab for the treatment of unprovoked anaphylaxis in patients with systemic mastocytosis. J Allergy Clin Immunol. 2007;119(6):1550-1551. doi:10.1016/j.jaci.2007.03.032
12. Douglass JA, Carroll K, Voskamp A, Bourke P, Wei A, O’Hehir RE. Omalizumab is effective in treating systemic mastocytosis in a nonatopic patient. Allergy. 2010; 65(7):926-927. doi:10.1111/j.1398-9995.2009.02259.x
13. Le M, Miedzybrodzki B, Olynych T, Chapdelaine H, Ben-Shoshan M. Natural history and treatment of cutaneous and systemic mastocytosis. Postgrad Med. 2017;129(8):896-901. doi:10.1080/00325481.2017.1364124
14. Distler M, Maul J-T, Steiner T, et al. Efficacy of omalizumab in mastocytosis: allusive indication obtained from a prospective, double-blind, multicenter study (XOLMA Study) [published online ahead of print January 20, 2020]. Dermatology. doi:10.1159/000504842
15. Constantine G, Bressler P, Petroni D, Metcalfe D, Carter M. Twelve-year follow-up of omalizumab for anaphylaxis in 2 patients with systemic mastocytosis. J Allergy Clin Immunol Pract. 2019;7(4)1314-1316. doi:10.1016/j.jaip.2018.07.041
16. Fanta CH. Asthma. N Engl J Med. 2009;360(10):1002-1014. doi:10.1056/NEJMra0804579
17. Baldo BA. Adverse events to monoclonal antibodies used for cancer therapy: focus on hypersensitivity responses. Oncoimmunology. 2013;2(10):e26333. doi:10.4161/onci.26333
18. Busse W, Buhl R, Fernandez Vidaurre C, et al. Omalizumab and the risk of malignancy: results from a pooled analysis. J Allergy Clin Immunol. 2012;129(4):983-989.e6. doi:10.1016/j.jaci.2012.01.033.
19. Castells M, Akin C. Mastocytosis (cutaneous and systemic): epidemiology, pathogenesis, and clinical manifestations. Accessed December 8, 2020. Updated June 12, 2018. https://www.uptodate.com/contents/mastocytosis-cutaneous-and-systemic-epidemiology-pathogenesis-and-clinical-manifestations
20. Czarny J, Lange M, Lugowska-Umer H, Nowicki R. Cutaneous mastocytosis treatment: strategies, limitations, and perspectives. Postepy Dermatol Alergol. 2018;35(6):541-545. doi:10.5114/ada.2018.77605
1. Theoharides TC, Valent P, Akin C. Mast cells, mastocytosis, and related disorders. N Engl J Med. 2015;373(2):163-172. doi:10.1056/NEJMra1409760
2. Valent P, Sperr WR, Schwartz LB, Horny H-P. Diagnosis and classification of mast cell proliferative disorders: delineation from immunologic diseases and non-mast cell hematopoietic neoplasms. J Allergy Clin Immunol. 2004;114(1):3-11. doi:10.1016/j.jaci.2004.02.045
3. Valent P, Sotlar K, Sperr WR, et al. Refined diagnostic criteria and classification of mast cell leukemia (MCL) and myelomastocytic leukemia (MML): a consensus proposal. Ann Oncol. 2014;25(9):1691-1700. doi:10.1093/annonc/mdu047
4. Valent P, Akin C, Metcalfe DD. Mastocytosis: 2016 updated WHO classification and novel emerging treatment concepts. Blood. 2017;129(11):1420-1427. doi:10.1182/blood-2016-09-731893
5. Broesby-Olsen S, Vestergaard H, Mortz CG, et al. Omalizumab prevents anaphylaxis and improves symptoms in systemic mastocytosis: Efficacy and safety observations. 2018;73(1):230-238. doi:10.1111/all.13237
6. Kaplan AP, Giménez-Arnau AM, Saini SS.Mechanisms of action that contribute to efficacy of omalizumab in chronic spontaneous urticaria. Allergy. 2017;72(4):519-533. doi:10.1111/all.13083
7. Borish L, Chipps B, Deniz Y, Gujrathi S, Zheng B, Dolan C; TENOR Study Group. Total serum IgE levels in a large cohort of patients with severe or difficult-to-treat asthma. Ann Allergy Asthma Immunol. 2005;95(3):247-253. doi:10.1016/S1081-1206(10)61221-5
8. Corry DB, Kheradmand F. Induction and regulation of the IgE response. Nature. 1999;402(suppl 6760):18-23. doi:10.1038/35037014
9. MacGlashan D, McKenzie-White J, Chichester K, et al. In vitro regulation of FcRIα expression on human basophils by IgE antibody. Blood. 1998;91(5):1633-1643.
10. XOLAIR [package insert]. East Hanover, NJ: Novartis Pharmaceuticals Corporation. Revised 2019. Accessed November 11, 2020. https://www.accessdata.fda.gov/drugsatfda_docs/label/2019/103976s5234lbl.pdf
11. Carter MC, Robyn JA, Bressler PB, Walker JC, Shapiro GC, and Metcalfe DD. Omalizumab for the treatment of unprovoked anaphylaxis in patients with systemic mastocytosis. J Allergy Clin Immunol. 2007;119(6):1550-1551. doi:10.1016/j.jaci.2007.03.032
12. Douglass JA, Carroll K, Voskamp A, Bourke P, Wei A, O’Hehir RE. Omalizumab is effective in treating systemic mastocytosis in a nonatopic patient. Allergy. 2010; 65(7):926-927. doi:10.1111/j.1398-9995.2009.02259.x
13. Le M, Miedzybrodzki B, Olynych T, Chapdelaine H, Ben-Shoshan M. Natural history and treatment of cutaneous and systemic mastocytosis. Postgrad Med. 2017;129(8):896-901. doi:10.1080/00325481.2017.1364124
14. Distler M, Maul J-T, Steiner T, et al. Efficacy of omalizumab in mastocytosis: allusive indication obtained from a prospective, double-blind, multicenter study (XOLMA Study) [published online ahead of print January 20, 2020]. Dermatology. doi:10.1159/000504842
15. Constantine G, Bressler P, Petroni D, Metcalfe D, Carter M. Twelve-year follow-up of omalizumab for anaphylaxis in 2 patients with systemic mastocytosis. J Allergy Clin Immunol Pract. 2019;7(4)1314-1316. doi:10.1016/j.jaip.2018.07.041
16. Fanta CH. Asthma. N Engl J Med. 2009;360(10):1002-1014. doi:10.1056/NEJMra0804579
17. Baldo BA. Adverse events to monoclonal antibodies used for cancer therapy: focus on hypersensitivity responses. Oncoimmunology. 2013;2(10):e26333. doi:10.4161/onci.26333
18. Busse W, Buhl R, Fernandez Vidaurre C, et al. Omalizumab and the risk of malignancy: results from a pooled analysis. J Allergy Clin Immunol. 2012;129(4):983-989.e6. doi:10.1016/j.jaci.2012.01.033.
19. Castells M, Akin C. Mastocytosis (cutaneous and systemic): epidemiology, pathogenesis, and clinical manifestations. Accessed December 8, 2020. Updated June 12, 2018. https://www.uptodate.com/contents/mastocytosis-cutaneous-and-systemic-epidemiology-pathogenesis-and-clinical-manifestations
20. Czarny J, Lange M, Lugowska-Umer H, Nowicki R. Cutaneous mastocytosis treatment: strategies, limitations, and perspectives. Postepy Dermatol Alergol. 2018;35(6):541-545. doi:10.5114/ada.2018.77605
Does daily inhaler monitoring improve asthma outcomes in children?
Among children with moderate or severe persistent asthma, a randomized trial suggests.
But the intervention also may lead to more ED visits and increased hospitalization rates.
“We improved asthma symptom control but did not reduce health care use,” Ruchi S. Gupta, MD, MPH, and colleagues, wrote in a study published in Pediatrics.
The monitoring system alerted clinicians when a patient used a short-acting beta-agonist more than four times in a day. It could be that the “alerts enabled providers to detect asthma exacerbation virtually and refer for clinically appropriate care that included directing children to the ED,” the authors suggested. It also is possible that the intervention led caregivers to be more vigilant about symptoms and more empowered to seek care.
Adherence to preventive regimens
Many patients with asthma need to use preventive medications such as daily inhaled corticosteroids to control symptoms. Researchers have developed sensor-based inhaler monitoring interventions to improve treatment adherence, but the effectiveness of these interventions in improving asthma outcomes in urban and minority populations is unclear.
To assess the effectiveness of a clinically integrated, sensor-based inhaler monitoring intervention on improving asthma symptom control and related outcomes in children, Dr. Gupta, of Northwestern University and Ann & Robert H. Lurie Children’s Hospital of Chicago, and colleagues conducted a randomized, unblinded study, known as the Improving Technology-Assisted Recording of Asthma Control in Children (iTRACC) trial. They included 252 children: 127 in the control group and 125 in the intervention group.
Patients in the intervention group received Propeller Health’s Food and Drug Administration–cleared inhaler sensors for inhaled corticosteroids and short-acting beta-agonists. Caregivers could use a mobile application and clinicians could use a Web portal to track patients’ medication use. The app featured personalized insights, educational content, encouragement, surveys, and care team services.
Researchers recruited caregivers and children from five Chicago clinics for the study, which was conducted between 2016 and 2018. They included children aged 4-17 years who had a prescription for daily inhaled corticosteroids for at least 1 year before enrollment. In addition, participants had at least 1 exacerbation requiring oral corticosteroids in the previous year. They excluded children with other respiratory conditions. They also excluded participants who did not speak English because the app was available only in English.
“Sensors monitored inhaled medication use, capturing the date, time, and number of uses, and transmitted this information via Bluetooth to a paired smartphone and the provider portal in real-time,” the authors said.
Clinicians were alerted to call participants if a patient missed inhaled corticosteroid doses for 4 continuous days or used more than 4 short-acting beta-agonist doses per day. Clinicians could help guide asthma management, schedule an appointment, refill medications, and address technical difficulties with the sensors.
The intervention and control groups had similar baseline characteristics. About one-third of the patients were female, and the mean age was 9.3 years. In the control group, 28% identified as Hispanic, and 33% identified as non-Hispanic Black. In the intervention group, 40% identified as Hispanic, and 23% identified as non-Hispanic Black. About 59% reported Medicaid insurance. The intervention and control arms completed electronic surveys at 1, 3, 6, 9, and 12 months.
Average Asthma Control Test score increased from 19 to 22 in the intervention group, compared with an increase from 19 to 20 in the control group. Adjusted rates of emergency department visits and hospitalizations were greater in the intervention group (incidence rate ratios, 2.2 and 3.4, respectively). A measure of caregiver quality of life was greater in the intervention group, although the difference was not significant.
During the trial, more caregivers in the intervention group reported asthma attacks for which steroids were prescribed by a medical office (73% vs. 35%).
Some participants had to manually enter the number of daily puffs into the app because their inhalers were incompatible with the sensors. In addition, some data were missing because of incomplete or missing survey responses and sensor failure over time. “The number of intervention participants with actively transmitting sensors decreased from 102 at baseline to 56 at 12 months,” Dr. Gupta and associates noted.
Important area of research
“One interesting finding of this study is the increase in health care use in the intervention group to nearly twice as many emergency department (ED) visits and three times as many hospitalizations as the control group over 12 months,” Rachelle R. Ramsey, PhD, and Theresa W. Guilbert, MD, MS, of the University of Cincinnati, wrote in a related commentary. “Although it is plausible that, as the authors suggest, greater asthma knowledge and monitoring may have led to increased vigilance of asthma symptoms, it seems that this would have only led to an increase in ED visits but not hospitalizations.”
The mixture of objective electronic monitoring and subjective self-reported adherence may complicate interpretation of the results, they added.
“Overall, this article underscores the feasibility and importance of sensor-based electronic monitoring of adherence in pediatric asthma and encourages future research in this area,” Dr. Ramsey and Dr. Guilbert said.
The trial was supported by the UnitedHealth Group. Dr. Gupta has received grants from the National Institutes of Health, Rho, and other organizations, and has served as a medical consultant and adviser for a variety of companies. Dr. Ramsey is supported by the NIH. Dr. Guilbert reported fees from the American Board of Pediatrics, the Pediatric Pulmonary Subboard, and some pharmaceutical companies, plus grants from the NIH, grants and personal fees from Sanofi, Regeneron, and AstraZeneca, and royalties from UpToDate.
SOURCE: Gupta RS et al. Pediatrics. 2020 Dec 22. doi: 10.1542/peds.2020-1330.
Among children with moderate or severe persistent asthma, a randomized trial suggests.
But the intervention also may lead to more ED visits and increased hospitalization rates.
“We improved asthma symptom control but did not reduce health care use,” Ruchi S. Gupta, MD, MPH, and colleagues, wrote in a study published in Pediatrics.
The monitoring system alerted clinicians when a patient used a short-acting beta-agonist more than four times in a day. It could be that the “alerts enabled providers to detect asthma exacerbation virtually and refer for clinically appropriate care that included directing children to the ED,” the authors suggested. It also is possible that the intervention led caregivers to be more vigilant about symptoms and more empowered to seek care.
Adherence to preventive regimens
Many patients with asthma need to use preventive medications such as daily inhaled corticosteroids to control symptoms. Researchers have developed sensor-based inhaler monitoring interventions to improve treatment adherence, but the effectiveness of these interventions in improving asthma outcomes in urban and minority populations is unclear.
To assess the effectiveness of a clinically integrated, sensor-based inhaler monitoring intervention on improving asthma symptom control and related outcomes in children, Dr. Gupta, of Northwestern University and Ann & Robert H. Lurie Children’s Hospital of Chicago, and colleagues conducted a randomized, unblinded study, known as the Improving Technology-Assisted Recording of Asthma Control in Children (iTRACC) trial. They included 252 children: 127 in the control group and 125 in the intervention group.
Patients in the intervention group received Propeller Health’s Food and Drug Administration–cleared inhaler sensors for inhaled corticosteroids and short-acting beta-agonists. Caregivers could use a mobile application and clinicians could use a Web portal to track patients’ medication use. The app featured personalized insights, educational content, encouragement, surveys, and care team services.
Researchers recruited caregivers and children from five Chicago clinics for the study, which was conducted between 2016 and 2018. They included children aged 4-17 years who had a prescription for daily inhaled corticosteroids for at least 1 year before enrollment. In addition, participants had at least 1 exacerbation requiring oral corticosteroids in the previous year. They excluded children with other respiratory conditions. They also excluded participants who did not speak English because the app was available only in English.
“Sensors monitored inhaled medication use, capturing the date, time, and number of uses, and transmitted this information via Bluetooth to a paired smartphone and the provider portal in real-time,” the authors said.
Clinicians were alerted to call participants if a patient missed inhaled corticosteroid doses for 4 continuous days or used more than 4 short-acting beta-agonist doses per day. Clinicians could help guide asthma management, schedule an appointment, refill medications, and address technical difficulties with the sensors.
The intervention and control groups had similar baseline characteristics. About one-third of the patients were female, and the mean age was 9.3 years. In the control group, 28% identified as Hispanic, and 33% identified as non-Hispanic Black. In the intervention group, 40% identified as Hispanic, and 23% identified as non-Hispanic Black. About 59% reported Medicaid insurance. The intervention and control arms completed electronic surveys at 1, 3, 6, 9, and 12 months.
Average Asthma Control Test score increased from 19 to 22 in the intervention group, compared with an increase from 19 to 20 in the control group. Adjusted rates of emergency department visits and hospitalizations were greater in the intervention group (incidence rate ratios, 2.2 and 3.4, respectively). A measure of caregiver quality of life was greater in the intervention group, although the difference was not significant.
During the trial, more caregivers in the intervention group reported asthma attacks for which steroids were prescribed by a medical office (73% vs. 35%).
Some participants had to manually enter the number of daily puffs into the app because their inhalers were incompatible with the sensors. In addition, some data were missing because of incomplete or missing survey responses and sensor failure over time. “The number of intervention participants with actively transmitting sensors decreased from 102 at baseline to 56 at 12 months,” Dr. Gupta and associates noted.
Important area of research
“One interesting finding of this study is the increase in health care use in the intervention group to nearly twice as many emergency department (ED) visits and three times as many hospitalizations as the control group over 12 months,” Rachelle R. Ramsey, PhD, and Theresa W. Guilbert, MD, MS, of the University of Cincinnati, wrote in a related commentary. “Although it is plausible that, as the authors suggest, greater asthma knowledge and monitoring may have led to increased vigilance of asthma symptoms, it seems that this would have only led to an increase in ED visits but not hospitalizations.”
The mixture of objective electronic monitoring and subjective self-reported adherence may complicate interpretation of the results, they added.
“Overall, this article underscores the feasibility and importance of sensor-based electronic monitoring of adherence in pediatric asthma and encourages future research in this area,” Dr. Ramsey and Dr. Guilbert said.
The trial was supported by the UnitedHealth Group. Dr. Gupta has received grants from the National Institutes of Health, Rho, and other organizations, and has served as a medical consultant and adviser for a variety of companies. Dr. Ramsey is supported by the NIH. Dr. Guilbert reported fees from the American Board of Pediatrics, the Pediatric Pulmonary Subboard, and some pharmaceutical companies, plus grants from the NIH, grants and personal fees from Sanofi, Regeneron, and AstraZeneca, and royalties from UpToDate.
SOURCE: Gupta RS et al. Pediatrics. 2020 Dec 22. doi: 10.1542/peds.2020-1330.
Among children with moderate or severe persistent asthma, a randomized trial suggests.
But the intervention also may lead to more ED visits and increased hospitalization rates.
“We improved asthma symptom control but did not reduce health care use,” Ruchi S. Gupta, MD, MPH, and colleagues, wrote in a study published in Pediatrics.
The monitoring system alerted clinicians when a patient used a short-acting beta-agonist more than four times in a day. It could be that the “alerts enabled providers to detect asthma exacerbation virtually and refer for clinically appropriate care that included directing children to the ED,” the authors suggested. It also is possible that the intervention led caregivers to be more vigilant about symptoms and more empowered to seek care.
Adherence to preventive regimens
Many patients with asthma need to use preventive medications such as daily inhaled corticosteroids to control symptoms. Researchers have developed sensor-based inhaler monitoring interventions to improve treatment adherence, but the effectiveness of these interventions in improving asthma outcomes in urban and minority populations is unclear.
To assess the effectiveness of a clinically integrated, sensor-based inhaler monitoring intervention on improving asthma symptom control and related outcomes in children, Dr. Gupta, of Northwestern University and Ann & Robert H. Lurie Children’s Hospital of Chicago, and colleagues conducted a randomized, unblinded study, known as the Improving Technology-Assisted Recording of Asthma Control in Children (iTRACC) trial. They included 252 children: 127 in the control group and 125 in the intervention group.
Patients in the intervention group received Propeller Health’s Food and Drug Administration–cleared inhaler sensors for inhaled corticosteroids and short-acting beta-agonists. Caregivers could use a mobile application and clinicians could use a Web portal to track patients’ medication use. The app featured personalized insights, educational content, encouragement, surveys, and care team services.
Researchers recruited caregivers and children from five Chicago clinics for the study, which was conducted between 2016 and 2018. They included children aged 4-17 years who had a prescription for daily inhaled corticosteroids for at least 1 year before enrollment. In addition, participants had at least 1 exacerbation requiring oral corticosteroids in the previous year. They excluded children with other respiratory conditions. They also excluded participants who did not speak English because the app was available only in English.
“Sensors monitored inhaled medication use, capturing the date, time, and number of uses, and transmitted this information via Bluetooth to a paired smartphone and the provider portal in real-time,” the authors said.
Clinicians were alerted to call participants if a patient missed inhaled corticosteroid doses for 4 continuous days or used more than 4 short-acting beta-agonist doses per day. Clinicians could help guide asthma management, schedule an appointment, refill medications, and address technical difficulties with the sensors.
The intervention and control groups had similar baseline characteristics. About one-third of the patients were female, and the mean age was 9.3 years. In the control group, 28% identified as Hispanic, and 33% identified as non-Hispanic Black. In the intervention group, 40% identified as Hispanic, and 23% identified as non-Hispanic Black. About 59% reported Medicaid insurance. The intervention and control arms completed electronic surveys at 1, 3, 6, 9, and 12 months.
Average Asthma Control Test score increased from 19 to 22 in the intervention group, compared with an increase from 19 to 20 in the control group. Adjusted rates of emergency department visits and hospitalizations were greater in the intervention group (incidence rate ratios, 2.2 and 3.4, respectively). A measure of caregiver quality of life was greater in the intervention group, although the difference was not significant.
During the trial, more caregivers in the intervention group reported asthma attacks for which steroids were prescribed by a medical office (73% vs. 35%).
Some participants had to manually enter the number of daily puffs into the app because their inhalers were incompatible with the sensors. In addition, some data were missing because of incomplete or missing survey responses and sensor failure over time. “The number of intervention participants with actively transmitting sensors decreased from 102 at baseline to 56 at 12 months,” Dr. Gupta and associates noted.
Important area of research
“One interesting finding of this study is the increase in health care use in the intervention group to nearly twice as many emergency department (ED) visits and three times as many hospitalizations as the control group over 12 months,” Rachelle R. Ramsey, PhD, and Theresa W. Guilbert, MD, MS, of the University of Cincinnati, wrote in a related commentary. “Although it is plausible that, as the authors suggest, greater asthma knowledge and monitoring may have led to increased vigilance of asthma symptoms, it seems that this would have only led to an increase in ED visits but not hospitalizations.”
The mixture of objective electronic monitoring and subjective self-reported adherence may complicate interpretation of the results, they added.
“Overall, this article underscores the feasibility and importance of sensor-based electronic monitoring of adherence in pediatric asthma and encourages future research in this area,” Dr. Ramsey and Dr. Guilbert said.
The trial was supported by the UnitedHealth Group. Dr. Gupta has received grants from the National Institutes of Health, Rho, and other organizations, and has served as a medical consultant and adviser for a variety of companies. Dr. Ramsey is supported by the NIH. Dr. Guilbert reported fees from the American Board of Pediatrics, the Pediatric Pulmonary Subboard, and some pharmaceutical companies, plus grants from the NIH, grants and personal fees from Sanofi, Regeneron, and AstraZeneca, and royalties from UpToDate.
SOURCE: Gupta RS et al. Pediatrics. 2020 Dec 22. doi: 10.1542/peds.2020-1330.
FROM PEDIATRICS
Getting closer to a lifesaving RSV vaccine
Louis Bont, MD, PhD, provided an overview of the most recent developments in the complex respiratory syncytial virus (RSV) vaccine landscape at the annual meeting of the European Society for Paediatric Infectious Diseases, held virtually this year.
RSV imposes significant burden worldwide, with 33 million patients, 3 million hospitalizations, and at least 120,000 deaths, reported Dr. Bont of the Wilhelmina Children’s Hospital, University Medical Centre, Utrecht, the Netherlands. Of those deaths, more than 50% are in infants younger than 5 months, and “about 99% of the children dying from RSV live in low- and middle-income countries.”
“There are high-risk populations, such as children with prematurity, congenital heart disease, lung disease, and Down syndrome, but about 73% of all children who are hospitalized for RSV infection were previously healthy children,” Dr. Bont explained. “So, we need to find a solution for all children to prevent RSV infection.”
As observed by Nienke Scheltema in a Lancet Global Health article, population distributions of RSV infection mortality show that, regardless of whether children have comorbidities or they are previously healthy, most children die at a very young age, Dr. Bont explained. These data suggest “that a maternal vaccine or an antibody prophylaxis approach from birth onwards or during the first RSV season is the solution for the problem.”
The path to developing an RSV vaccine has now narrowed its focus onto a structural element of RSV, the prefusion F protein. This shift started with the discovery by Jason McLellan (Science, 2013 [two papers]) that there are two variants of the RSV F-fusion protein: the very stable postfusion conformation and the prefusion active conformation, a metastable protein that exists for a “fraction of a second,” Dr. Bont said.
“The interesting thing is that epitopes that are visible at the prefusion, metastable state … induce highly neutralizing antibodies, whereas epitopes at the postfusion conformation do not,” Dr. Bont explained. “So, by stabilizing the prefusion state, we start inducing neutralizing antibodies that will protect against severe RSV infection, and this is the basic concept of all the vaccine developments currently ongoing.”
These RSV vaccine developments fall into five approach types: live-attenuated or chimeric vaccines, vector-based vaccines, monoclonal antibodies, particle-based vaccines, and subunit or protein-based vaccines.
One breakthrough, which was presented at last year’s ESPID meeting, is the monoclonal antibody nirsevimab. In addition to being nine times more potent than the broadly used antibody palivizumab, it is also more stable; whereas many antibodies have a half-life of 3 weeks, nirsevimab has a half-life of 100 days. “The idea is that a single injection at the start of the RSV season protects children in the first RSV season of their life, a dangerous episode for them.” Dr. Bont explained. The originators, AstraZeneca and Sanofi Pasteur, have “the vision that every child on this planet should receive a single injection with this antibody in the first season,” he explained.
Studies of nanoparticle-based maternal vaccines have also revealed interesting results: Although a phase 3 trial investigating such vaccines didn’t achieve its primary endpoint, “interestingly, 15% of all RSV infections were mild, and only 2% were very severe and leading to hypoxemia,” Dr. Bont noted. “But if we look at vaccine efficacy, we see the opposite – the vaccine was not very efficacious to prevent mild disease, but very efficacious to prevent severe hypoxemia; actually, this is exactly what you would like to see in a vaccine.”
Investigations into live-attenuated and vector-based vaccines have been promising as well, Dr. Bont shared. Studies of live-attenuated vaccines suggest they have a future and that we can move onto their next phase of clinical development, and a study investigating adenoviral vector-based vaccines has demonstrated safety, efficacy, and immunogenicity, though it has also shown that we should anticipate some side effects when using them.
Simple subunit vaccines for RSV are also being explored – a study of DS-Cav1, a stabilized prefusion F subunit protein candidate vaccine, has shown that it has a superior functional profile, compared with previous pre-F subunit vaccines. However, it seemed to be more efficacious against strains of RSV A than strains of RSV B, the dominant strain.
Dr. Bont also discussed exciting work by Sesterhenn et al., in which they used a computer-based program to develop their own vaccine. Using their in-depth knowledge of the RSV prefusion F protein and a computer program, Sesterhenn et al. developed a trivalent vaccine, produced it, and showed – both in vitro and in monkeys – that such vaccines can work up to the level of preclinical in vivo experiments.
“We can now make vaccines behind our computer,” Dr. Bont declared. “And the system doesn’t only work for RSV vaccines, but also for other pathogens – as long as you have an in-depth molecular knowledge of the target epitope,” he added.
Joanne Wildenbeest, MD, PhD, at the Utrecht University, the Netherlands commented: “Lower respiratory tract infections due to RSV are among the leading causes of death worldwide in children under the age of 5, especially young infants. The recent advances in the development of a vaccine and passive immunization are important steps towards the goal to reduce childhood mortality due to RSV worldwide. Since RSV-related mortality is mainly seen in developing countries it is important that, once a vaccine has been approved, it will also be made easily available to these countries.”
Dr. Bont reported the following disclosures: ReSViNET (a nonprofit foundation); investigator-initiated studies with the Bill & Melinda Gates Foundation, AbbVie, MedImmune, and MeMed; participation with Pfizer, Regeneron, and Janssen; and consultancy with GlaxoSmithKline, Ablynx, Novavax, and Janssen.
Louis Bont, MD, PhD, provided an overview of the most recent developments in the complex respiratory syncytial virus (RSV) vaccine landscape at the annual meeting of the European Society for Paediatric Infectious Diseases, held virtually this year.
RSV imposes significant burden worldwide, with 33 million patients, 3 million hospitalizations, and at least 120,000 deaths, reported Dr. Bont of the Wilhelmina Children’s Hospital, University Medical Centre, Utrecht, the Netherlands. Of those deaths, more than 50% are in infants younger than 5 months, and “about 99% of the children dying from RSV live in low- and middle-income countries.”
“There are high-risk populations, such as children with prematurity, congenital heart disease, lung disease, and Down syndrome, but about 73% of all children who are hospitalized for RSV infection were previously healthy children,” Dr. Bont explained. “So, we need to find a solution for all children to prevent RSV infection.”
As observed by Nienke Scheltema in a Lancet Global Health article, population distributions of RSV infection mortality show that, regardless of whether children have comorbidities or they are previously healthy, most children die at a very young age, Dr. Bont explained. These data suggest “that a maternal vaccine or an antibody prophylaxis approach from birth onwards or during the first RSV season is the solution for the problem.”
The path to developing an RSV vaccine has now narrowed its focus onto a structural element of RSV, the prefusion F protein. This shift started with the discovery by Jason McLellan (Science, 2013 [two papers]) that there are two variants of the RSV F-fusion protein: the very stable postfusion conformation and the prefusion active conformation, a metastable protein that exists for a “fraction of a second,” Dr. Bont said.
“The interesting thing is that epitopes that are visible at the prefusion, metastable state … induce highly neutralizing antibodies, whereas epitopes at the postfusion conformation do not,” Dr. Bont explained. “So, by stabilizing the prefusion state, we start inducing neutralizing antibodies that will protect against severe RSV infection, and this is the basic concept of all the vaccine developments currently ongoing.”
These RSV vaccine developments fall into five approach types: live-attenuated or chimeric vaccines, vector-based vaccines, monoclonal antibodies, particle-based vaccines, and subunit or protein-based vaccines.
One breakthrough, which was presented at last year’s ESPID meeting, is the monoclonal antibody nirsevimab. In addition to being nine times more potent than the broadly used antibody palivizumab, it is also more stable; whereas many antibodies have a half-life of 3 weeks, nirsevimab has a half-life of 100 days. “The idea is that a single injection at the start of the RSV season protects children in the first RSV season of their life, a dangerous episode for them.” Dr. Bont explained. The originators, AstraZeneca and Sanofi Pasteur, have “the vision that every child on this planet should receive a single injection with this antibody in the first season,” he explained.
Studies of nanoparticle-based maternal vaccines have also revealed interesting results: Although a phase 3 trial investigating such vaccines didn’t achieve its primary endpoint, “interestingly, 15% of all RSV infections were mild, and only 2% were very severe and leading to hypoxemia,” Dr. Bont noted. “But if we look at vaccine efficacy, we see the opposite – the vaccine was not very efficacious to prevent mild disease, but very efficacious to prevent severe hypoxemia; actually, this is exactly what you would like to see in a vaccine.”
Investigations into live-attenuated and vector-based vaccines have been promising as well, Dr. Bont shared. Studies of live-attenuated vaccines suggest they have a future and that we can move onto their next phase of clinical development, and a study investigating adenoviral vector-based vaccines has demonstrated safety, efficacy, and immunogenicity, though it has also shown that we should anticipate some side effects when using them.
Simple subunit vaccines for RSV are also being explored – a study of DS-Cav1, a stabilized prefusion F subunit protein candidate vaccine, has shown that it has a superior functional profile, compared with previous pre-F subunit vaccines. However, it seemed to be more efficacious against strains of RSV A than strains of RSV B, the dominant strain.
Dr. Bont also discussed exciting work by Sesterhenn et al., in which they used a computer-based program to develop their own vaccine. Using their in-depth knowledge of the RSV prefusion F protein and a computer program, Sesterhenn et al. developed a trivalent vaccine, produced it, and showed – both in vitro and in monkeys – that such vaccines can work up to the level of preclinical in vivo experiments.
“We can now make vaccines behind our computer,” Dr. Bont declared. “And the system doesn’t only work for RSV vaccines, but also for other pathogens – as long as you have an in-depth molecular knowledge of the target epitope,” he added.
Joanne Wildenbeest, MD, PhD, at the Utrecht University, the Netherlands commented: “Lower respiratory tract infections due to RSV are among the leading causes of death worldwide in children under the age of 5, especially young infants. The recent advances in the development of a vaccine and passive immunization are important steps towards the goal to reduce childhood mortality due to RSV worldwide. Since RSV-related mortality is mainly seen in developing countries it is important that, once a vaccine has been approved, it will also be made easily available to these countries.”
Dr. Bont reported the following disclosures: ReSViNET (a nonprofit foundation); investigator-initiated studies with the Bill & Melinda Gates Foundation, AbbVie, MedImmune, and MeMed; participation with Pfizer, Regeneron, and Janssen; and consultancy with GlaxoSmithKline, Ablynx, Novavax, and Janssen.
Louis Bont, MD, PhD, provided an overview of the most recent developments in the complex respiratory syncytial virus (RSV) vaccine landscape at the annual meeting of the European Society for Paediatric Infectious Diseases, held virtually this year.
RSV imposes significant burden worldwide, with 33 million patients, 3 million hospitalizations, and at least 120,000 deaths, reported Dr. Bont of the Wilhelmina Children’s Hospital, University Medical Centre, Utrecht, the Netherlands. Of those deaths, more than 50% are in infants younger than 5 months, and “about 99% of the children dying from RSV live in low- and middle-income countries.”
“There are high-risk populations, such as children with prematurity, congenital heart disease, lung disease, and Down syndrome, but about 73% of all children who are hospitalized for RSV infection were previously healthy children,” Dr. Bont explained. “So, we need to find a solution for all children to prevent RSV infection.”
As observed by Nienke Scheltema in a Lancet Global Health article, population distributions of RSV infection mortality show that, regardless of whether children have comorbidities or they are previously healthy, most children die at a very young age, Dr. Bont explained. These data suggest “that a maternal vaccine or an antibody prophylaxis approach from birth onwards or during the first RSV season is the solution for the problem.”
The path to developing an RSV vaccine has now narrowed its focus onto a structural element of RSV, the prefusion F protein. This shift started with the discovery by Jason McLellan (Science, 2013 [two papers]) that there are two variants of the RSV F-fusion protein: the very stable postfusion conformation and the prefusion active conformation, a metastable protein that exists for a “fraction of a second,” Dr. Bont said.
“The interesting thing is that epitopes that are visible at the prefusion, metastable state … induce highly neutralizing antibodies, whereas epitopes at the postfusion conformation do not,” Dr. Bont explained. “So, by stabilizing the prefusion state, we start inducing neutralizing antibodies that will protect against severe RSV infection, and this is the basic concept of all the vaccine developments currently ongoing.”
These RSV vaccine developments fall into five approach types: live-attenuated or chimeric vaccines, vector-based vaccines, monoclonal antibodies, particle-based vaccines, and subunit or protein-based vaccines.
One breakthrough, which was presented at last year’s ESPID meeting, is the monoclonal antibody nirsevimab. In addition to being nine times more potent than the broadly used antibody palivizumab, it is also more stable; whereas many antibodies have a half-life of 3 weeks, nirsevimab has a half-life of 100 days. “The idea is that a single injection at the start of the RSV season protects children in the first RSV season of their life, a dangerous episode for them.” Dr. Bont explained. The originators, AstraZeneca and Sanofi Pasteur, have “the vision that every child on this planet should receive a single injection with this antibody in the first season,” he explained.
Studies of nanoparticle-based maternal vaccines have also revealed interesting results: Although a phase 3 trial investigating such vaccines didn’t achieve its primary endpoint, “interestingly, 15% of all RSV infections were mild, and only 2% were very severe and leading to hypoxemia,” Dr. Bont noted. “But if we look at vaccine efficacy, we see the opposite – the vaccine was not very efficacious to prevent mild disease, but very efficacious to prevent severe hypoxemia; actually, this is exactly what you would like to see in a vaccine.”
Investigations into live-attenuated and vector-based vaccines have been promising as well, Dr. Bont shared. Studies of live-attenuated vaccines suggest they have a future and that we can move onto their next phase of clinical development, and a study investigating adenoviral vector-based vaccines has demonstrated safety, efficacy, and immunogenicity, though it has also shown that we should anticipate some side effects when using them.
Simple subunit vaccines for RSV are also being explored – a study of DS-Cav1, a stabilized prefusion F subunit protein candidate vaccine, has shown that it has a superior functional profile, compared with previous pre-F subunit vaccines. However, it seemed to be more efficacious against strains of RSV A than strains of RSV B, the dominant strain.
Dr. Bont also discussed exciting work by Sesterhenn et al., in which they used a computer-based program to develop their own vaccine. Using their in-depth knowledge of the RSV prefusion F protein and a computer program, Sesterhenn et al. developed a trivalent vaccine, produced it, and showed – both in vitro and in monkeys – that such vaccines can work up to the level of preclinical in vivo experiments.
“We can now make vaccines behind our computer,” Dr. Bont declared. “And the system doesn’t only work for RSV vaccines, but also for other pathogens – as long as you have an in-depth molecular knowledge of the target epitope,” he added.
Joanne Wildenbeest, MD, PhD, at the Utrecht University, the Netherlands commented: “Lower respiratory tract infections due to RSV are among the leading causes of death worldwide in children under the age of 5, especially young infants. The recent advances in the development of a vaccine and passive immunization are important steps towards the goal to reduce childhood mortality due to RSV worldwide. Since RSV-related mortality is mainly seen in developing countries it is important that, once a vaccine has been approved, it will also be made easily available to these countries.”
Dr. Bont reported the following disclosures: ReSViNET (a nonprofit foundation); investigator-initiated studies with the Bill & Melinda Gates Foundation, AbbVie, MedImmune, and MeMed; participation with Pfizer, Regeneron, and Janssen; and consultancy with GlaxoSmithKline, Ablynx, Novavax, and Janssen.
FROM ESPID 2020
Seeking new vaccines against whooping cough: The PERISCOPE project
Although there is an effective vaccine against Bordetella pertussis, whooping cough remains a leading cause of death. Cases are increasing, and scientists face challenges in developing new vaccines.
In a key research session at the start of the annual meeting of the European Society for Paediatric Infectious Diseases, held virtually this year, Dimitri Diavatopoulos, PhD, associate professor at the Radboud University Medical Centre Nijmegen, the Netherlands, summarized the pertussis vaccination problem and what the Pertussis Correlates of Protection Europe (PERISCOPE) project seeks to achieve. Dr. Diavatopoulos has a longstanding interest in pertussis and immunity and will soon take over as the scientific coordinator of PERISCOPE.
Pertussis is a highly contagious infectious disease that causes uncontrollable coughing. The disease begins with an atypical cough and rhinorrhea before entering a paroxysmal stage characterized by cyanosis, lymphocytosis, vomiting, and whoops. Generally, fever is absent and coughing increases at night. Finally, after weeks to months, the patient enters a convalescent stage. The World Health Organization estimates that there are 16 million pertussis cases annually and approximately 195,000 deaths in children. Most cases are caused by Bordetella pertussis and are preventable by vaccination.
In the United States, following the introduction of a national immunization program using a whole-cell vaccine in the 1950s, cases fell significantly. After a lag phase, the adoption of an acellular vaccine in the United States in 1997 and the Netherlands in 2005 – usually in combination with diphtheria and tetanus via DTaP – saw an increase in case numbers. Dr. Diavatopoulos stated that control is no longer as good, compared with other infectious diseases prevented by the MMR vaccine, such as mumps, measles, and rubella.
In the face of increasing numbers, how do we move to the next generation of vaccines to improve control? There are several barriers to licensure, including the following:
• Universal recommendation for pertussis prevention means that more than 90% of the population will have received DTaP (usually in combination with polio and Haemophilus influenzae B) and be protected for several years after vaccination.
• Because DTaP vaccines are only efficacious for a limited time, the problem is not immediately apparent.
• Pertussis epidemics are cyclical, occurring every 3-5 years. These peaks and troughs complicate the development of epidemiological studies.
What this means is that large-scale Phase III efficacy studies, in which disease is used as the endpoint, are not feasible. Also, formal correlates of protection have not been identified.
The PERISCOPE Project started in March 2016 and is designed to respond to some of these issues. Funding is made available by a public private consortium involving the Bill & Melinda Gates foundation, the European Union, and European Federation of Pharmaceutical Industries and Associations (EFPIA) partners, and in this case, GlaxoSmithKline and Sanofi Pasteur. In total, there are 22 partners in this project.
The strategic objectives of this partnership include the following:
• Foster expertise and increase capacity in Europe to evaluate new pertussis vaccines both in clinical and preclinical models.
• Identify early biomarkers of long-lasting protective immunity to pertussis in humans. (This step will accelerate and de-risk clinical development of next generation pertussis vaccines.)
• Investigate the impact of maternal vaccination on infant response to pertussis vaccination.
The problem is that there is no one single study design that addresses all questions about the pertussis vaccine. For example, in PERISCOPE, the results of preclinical studies using the baboon or mouse models and addressing disease and colonization endpoints or immunogenicity do not perfectly model human infection and disease.
By comparison, controlled human infection studies provide information on colonization but not disease endpoints. Such studies, however, do provide information on immunogenicity endpoints. Also available are booster vaccination studies and infant vaccination studies providing data on immunogenicity, as well as safety information.
Finally, there are patient studies, such as household contact studies where immunogenicity can be correlated to disease endpoints. From these studies, it will be seen that what is needed is integration of evidence from clinical and preclinical studies to support a new vaccine registration.
PERISCOPE addresses these issues by developing novel, functional antibody and cellular assays and employing cutting-edge methods to characterize innate immune responses and cell-mediated systemic and mucosal immunity. PERISCOPE combines two major industrial partners with public researchers from academic and public health institutes and small and medium-sized enterprises with expertise in clinical trials, vaccinology, immunology, molecular microbiology, challenge models, and bioinformatics.
Andrew Gorringe, PhD, from Public Health England and the Research and Development Institute at Porton Down, Wiltshire, England, said, “Vaccines have greatly reduced the incidence of pertussis, but it remains the most prevalent ‘vaccine preventable’ disease. This is an exciting period for pertussis vaccine research as we find new ways to understand the immunity that protects from both infection and disease. The PERISCOPE project provides a collaborative environment that combines expertise across Europe to provide a route to the development of new, more effective vaccines.”
GSK and Sanofi Pasteur have cofunded the PERISCOPE Project. Dr. Diavatopoulos made no other financial disclosures.
Although there is an effective vaccine against Bordetella pertussis, whooping cough remains a leading cause of death. Cases are increasing, and scientists face challenges in developing new vaccines.
In a key research session at the start of the annual meeting of the European Society for Paediatric Infectious Diseases, held virtually this year, Dimitri Diavatopoulos, PhD, associate professor at the Radboud University Medical Centre Nijmegen, the Netherlands, summarized the pertussis vaccination problem and what the Pertussis Correlates of Protection Europe (PERISCOPE) project seeks to achieve. Dr. Diavatopoulos has a longstanding interest in pertussis and immunity and will soon take over as the scientific coordinator of PERISCOPE.
Pertussis is a highly contagious infectious disease that causes uncontrollable coughing. The disease begins with an atypical cough and rhinorrhea before entering a paroxysmal stage characterized by cyanosis, lymphocytosis, vomiting, and whoops. Generally, fever is absent and coughing increases at night. Finally, after weeks to months, the patient enters a convalescent stage. The World Health Organization estimates that there are 16 million pertussis cases annually and approximately 195,000 deaths in children. Most cases are caused by Bordetella pertussis and are preventable by vaccination.
In the United States, following the introduction of a national immunization program using a whole-cell vaccine in the 1950s, cases fell significantly. After a lag phase, the adoption of an acellular vaccine in the United States in 1997 and the Netherlands in 2005 – usually in combination with diphtheria and tetanus via DTaP – saw an increase in case numbers. Dr. Diavatopoulos stated that control is no longer as good, compared with other infectious diseases prevented by the MMR vaccine, such as mumps, measles, and rubella.
In the face of increasing numbers, how do we move to the next generation of vaccines to improve control? There are several barriers to licensure, including the following:
• Universal recommendation for pertussis prevention means that more than 90% of the population will have received DTaP (usually in combination with polio and Haemophilus influenzae B) and be protected for several years after vaccination.
• Because DTaP vaccines are only efficacious for a limited time, the problem is not immediately apparent.
• Pertussis epidemics are cyclical, occurring every 3-5 years. These peaks and troughs complicate the development of epidemiological studies.
What this means is that large-scale Phase III efficacy studies, in which disease is used as the endpoint, are not feasible. Also, formal correlates of protection have not been identified.
The PERISCOPE Project started in March 2016 and is designed to respond to some of these issues. Funding is made available by a public private consortium involving the Bill & Melinda Gates foundation, the European Union, and European Federation of Pharmaceutical Industries and Associations (EFPIA) partners, and in this case, GlaxoSmithKline and Sanofi Pasteur. In total, there are 22 partners in this project.
The strategic objectives of this partnership include the following:
• Foster expertise and increase capacity in Europe to evaluate new pertussis vaccines both in clinical and preclinical models.
• Identify early biomarkers of long-lasting protective immunity to pertussis in humans. (This step will accelerate and de-risk clinical development of next generation pertussis vaccines.)
• Investigate the impact of maternal vaccination on infant response to pertussis vaccination.
The problem is that there is no one single study design that addresses all questions about the pertussis vaccine. For example, in PERISCOPE, the results of preclinical studies using the baboon or mouse models and addressing disease and colonization endpoints or immunogenicity do not perfectly model human infection and disease.
By comparison, controlled human infection studies provide information on colonization but not disease endpoints. Such studies, however, do provide information on immunogenicity endpoints. Also available are booster vaccination studies and infant vaccination studies providing data on immunogenicity, as well as safety information.
Finally, there are patient studies, such as household contact studies where immunogenicity can be correlated to disease endpoints. From these studies, it will be seen that what is needed is integration of evidence from clinical and preclinical studies to support a new vaccine registration.
PERISCOPE addresses these issues by developing novel, functional antibody and cellular assays and employing cutting-edge methods to characterize innate immune responses and cell-mediated systemic and mucosal immunity. PERISCOPE combines two major industrial partners with public researchers from academic and public health institutes and small and medium-sized enterprises with expertise in clinical trials, vaccinology, immunology, molecular microbiology, challenge models, and bioinformatics.
Andrew Gorringe, PhD, from Public Health England and the Research and Development Institute at Porton Down, Wiltshire, England, said, “Vaccines have greatly reduced the incidence of pertussis, but it remains the most prevalent ‘vaccine preventable’ disease. This is an exciting period for pertussis vaccine research as we find new ways to understand the immunity that protects from both infection and disease. The PERISCOPE project provides a collaborative environment that combines expertise across Europe to provide a route to the development of new, more effective vaccines.”
GSK and Sanofi Pasteur have cofunded the PERISCOPE Project. Dr. Diavatopoulos made no other financial disclosures.
Although there is an effective vaccine against Bordetella pertussis, whooping cough remains a leading cause of death. Cases are increasing, and scientists face challenges in developing new vaccines.
In a key research session at the start of the annual meeting of the European Society for Paediatric Infectious Diseases, held virtually this year, Dimitri Diavatopoulos, PhD, associate professor at the Radboud University Medical Centre Nijmegen, the Netherlands, summarized the pertussis vaccination problem and what the Pertussis Correlates of Protection Europe (PERISCOPE) project seeks to achieve. Dr. Diavatopoulos has a longstanding interest in pertussis and immunity and will soon take over as the scientific coordinator of PERISCOPE.
Pertussis is a highly contagious infectious disease that causes uncontrollable coughing. The disease begins with an atypical cough and rhinorrhea before entering a paroxysmal stage characterized by cyanosis, lymphocytosis, vomiting, and whoops. Generally, fever is absent and coughing increases at night. Finally, after weeks to months, the patient enters a convalescent stage. The World Health Organization estimates that there are 16 million pertussis cases annually and approximately 195,000 deaths in children. Most cases are caused by Bordetella pertussis and are preventable by vaccination.
In the United States, following the introduction of a national immunization program using a whole-cell vaccine in the 1950s, cases fell significantly. After a lag phase, the adoption of an acellular vaccine in the United States in 1997 and the Netherlands in 2005 – usually in combination with diphtheria and tetanus via DTaP – saw an increase in case numbers. Dr. Diavatopoulos stated that control is no longer as good, compared with other infectious diseases prevented by the MMR vaccine, such as mumps, measles, and rubella.
In the face of increasing numbers, how do we move to the next generation of vaccines to improve control? There are several barriers to licensure, including the following:
• Universal recommendation for pertussis prevention means that more than 90% of the population will have received DTaP (usually in combination with polio and Haemophilus influenzae B) and be protected for several years after vaccination.
• Because DTaP vaccines are only efficacious for a limited time, the problem is not immediately apparent.
• Pertussis epidemics are cyclical, occurring every 3-5 years. These peaks and troughs complicate the development of epidemiological studies.
What this means is that large-scale Phase III efficacy studies, in which disease is used as the endpoint, are not feasible. Also, formal correlates of protection have not been identified.
The PERISCOPE Project started in March 2016 and is designed to respond to some of these issues. Funding is made available by a public private consortium involving the Bill & Melinda Gates foundation, the European Union, and European Federation of Pharmaceutical Industries and Associations (EFPIA) partners, and in this case, GlaxoSmithKline and Sanofi Pasteur. In total, there are 22 partners in this project.
The strategic objectives of this partnership include the following:
• Foster expertise and increase capacity in Europe to evaluate new pertussis vaccines both in clinical and preclinical models.
• Identify early biomarkers of long-lasting protective immunity to pertussis in humans. (This step will accelerate and de-risk clinical development of next generation pertussis vaccines.)
• Investigate the impact of maternal vaccination on infant response to pertussis vaccination.
The problem is that there is no one single study design that addresses all questions about the pertussis vaccine. For example, in PERISCOPE, the results of preclinical studies using the baboon or mouse models and addressing disease and colonization endpoints or immunogenicity do not perfectly model human infection and disease.
By comparison, controlled human infection studies provide information on colonization but not disease endpoints. Such studies, however, do provide information on immunogenicity endpoints. Also available are booster vaccination studies and infant vaccination studies providing data on immunogenicity, as well as safety information.
Finally, there are patient studies, such as household contact studies where immunogenicity can be correlated to disease endpoints. From these studies, it will be seen that what is needed is integration of evidence from clinical and preclinical studies to support a new vaccine registration.
PERISCOPE addresses these issues by developing novel, functional antibody and cellular assays and employing cutting-edge methods to characterize innate immune responses and cell-mediated systemic and mucosal immunity. PERISCOPE combines two major industrial partners with public researchers from academic and public health institutes and small and medium-sized enterprises with expertise in clinical trials, vaccinology, immunology, molecular microbiology, challenge models, and bioinformatics.
Andrew Gorringe, PhD, from Public Health England and the Research and Development Institute at Porton Down, Wiltshire, England, said, “Vaccines have greatly reduced the incidence of pertussis, but it remains the most prevalent ‘vaccine preventable’ disease. This is an exciting period for pertussis vaccine research as we find new ways to understand the immunity that protects from both infection and disease. The PERISCOPE project provides a collaborative environment that combines expertise across Europe to provide a route to the development of new, more effective vaccines.”
GSK and Sanofi Pasteur have cofunded the PERISCOPE Project. Dr. Diavatopoulos made no other financial disclosures.
FROM ESPID 2020
COVID-19–induced drop in first measles vaccinations sparks resurgence concerns
Widespread use of the MMR vaccine is not only crucial for protecting the community against infectious outbreaks, but also serves as the overall pacesetter for preventive services, said Sara M. Bode, MD and colleagues at Nationwide Children’s Hospital in Columbus.
As part of a bivariate logistic regression analysis, Dr. Bode and colleagues sought to evaluate changes in measles vaccination rates across 12 clinic sites of the Nationwide Children’s Hospital pediatric primary care network in Columbus among 23,534 children aged 16 months. The study period targeted the time between April and May 2020, when clinic access and appointment attendance declined following the start of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic, until the June-to-August 2020 time period, when clinical care was allowed to return.
The need for the study was prompted by Centers for Disease Control and Prevention reporting on a state-specific precipitous decline in MMR vaccination rates shortly after the onset of COVID-19 in May 2020. Citing the results of one study, such reductions in vaccination have raised concerns over the possibility of a measles resurgence, noted Dr. Bode and associates.
MMR vaccination rates begin to drop with onset of COVID-19 pandemic.
From March 2017 to March 2020, the average rate of MMR vaccination in 16-month-olds was 72%. It subsequently decreased to 67% from April to May 2020, and then dropped further to 62% during the period June to August, 2020 (P = .001). Those without insurance were less likely to be vaccinated than were those carrying private insurance or Medicaid.
Among patients who had not attended a preventive care visit after 12 months of age, the proportion who received vaccines declined during the same time periods, from 10% before the pandemic to 6% at the start of the pandemic and 3% during the summer months of 2020.
“Given the baseline low vaccination rates even before the pandemic and the subsequent decline, we face a critical need to improve timely vaccination and provide catch-up opportunities” in areas with the highest incidence of COVID-19, observed Dr. Bode and colleagues.
Innovative approaches are needed to encourage families to seek preventive care.
In response, the researchers announced the implementation of new community-based vaccination approaches in Ohio, including pop-up vaccine clinics, mobile clinics, and school-based clinics to provide families, who are reluctant to visit health care facilities over COVID-19 related concerns, with safe alternatives. “We believe that it is critical to develop innovative approaches to have families return for preventive care,” they added.
In a separate interview, Herschel Lessin, MD, a private practice pediatrician in Poughkeepsie, N.Y., noted: “This study confirms the anecdotal experience of pediatricians around the country, and our greatest fear that the pandemic will interfere with herd immunity of children for vaccine-preventable illness. Although the study was of urban offices with a primarily Medicaid population, I believe the results to be very worrisome should they prove to be generalizable to the country, as a whole. The significant reduction of well-child visits due to COVID-19 (and fear of COVID-19) seriously impaired the vaccination status of a standard required vaccine in a large population. What is even more worrisome is that the rates continued to fall even after the initial closure of many offices and well into their reopening, despite concerted efforts to try to catch up these missed visits and immunizations.”
Measles is an intensely contagious illness that has not been eradicated, as evidenced by the enormous measles outbreak stemming from Disneyland in 2014-2015, and again with the possible exposure of hundreds to an infected Disneyland visitor last fall, where coverage rates were even higher than in this study, added Dr. Lessin. “This phenomenon, unless forcefully remedied, could easily result in large outbreaks of other vaccine-preventable illness besides COVID-19,” he cautioned.
Dr. Bode and colleagues as well as Dr. Lessin had no conflicts of interest and no relevant financial disclosures.
SOURCE: Bode SM et al. Pediatrics. 2021. doi: 10.1542/peds.2020-035576.
Widespread use of the MMR vaccine is not only crucial for protecting the community against infectious outbreaks, but also serves as the overall pacesetter for preventive services, said Sara M. Bode, MD and colleagues at Nationwide Children’s Hospital in Columbus.
As part of a bivariate logistic regression analysis, Dr. Bode and colleagues sought to evaluate changes in measles vaccination rates across 12 clinic sites of the Nationwide Children’s Hospital pediatric primary care network in Columbus among 23,534 children aged 16 months. The study period targeted the time between April and May 2020, when clinic access and appointment attendance declined following the start of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic, until the June-to-August 2020 time period, when clinical care was allowed to return.
The need for the study was prompted by Centers for Disease Control and Prevention reporting on a state-specific precipitous decline in MMR vaccination rates shortly after the onset of COVID-19 in May 2020. Citing the results of one study, such reductions in vaccination have raised concerns over the possibility of a measles resurgence, noted Dr. Bode and associates.
MMR vaccination rates begin to drop with onset of COVID-19 pandemic.
From March 2017 to March 2020, the average rate of MMR vaccination in 16-month-olds was 72%. It subsequently decreased to 67% from April to May 2020, and then dropped further to 62% during the period June to August, 2020 (P = .001). Those without insurance were less likely to be vaccinated than were those carrying private insurance or Medicaid.
Among patients who had not attended a preventive care visit after 12 months of age, the proportion who received vaccines declined during the same time periods, from 10% before the pandemic to 6% at the start of the pandemic and 3% during the summer months of 2020.
“Given the baseline low vaccination rates even before the pandemic and the subsequent decline, we face a critical need to improve timely vaccination and provide catch-up opportunities” in areas with the highest incidence of COVID-19, observed Dr. Bode and colleagues.
Innovative approaches are needed to encourage families to seek preventive care.
In response, the researchers announced the implementation of new community-based vaccination approaches in Ohio, including pop-up vaccine clinics, mobile clinics, and school-based clinics to provide families, who are reluctant to visit health care facilities over COVID-19 related concerns, with safe alternatives. “We believe that it is critical to develop innovative approaches to have families return for preventive care,” they added.
In a separate interview, Herschel Lessin, MD, a private practice pediatrician in Poughkeepsie, N.Y., noted: “This study confirms the anecdotal experience of pediatricians around the country, and our greatest fear that the pandemic will interfere with herd immunity of children for vaccine-preventable illness. Although the study was of urban offices with a primarily Medicaid population, I believe the results to be very worrisome should they prove to be generalizable to the country, as a whole. The significant reduction of well-child visits due to COVID-19 (and fear of COVID-19) seriously impaired the vaccination status of a standard required vaccine in a large population. What is even more worrisome is that the rates continued to fall even after the initial closure of many offices and well into their reopening, despite concerted efforts to try to catch up these missed visits and immunizations.”
Measles is an intensely contagious illness that has not been eradicated, as evidenced by the enormous measles outbreak stemming from Disneyland in 2014-2015, and again with the possible exposure of hundreds to an infected Disneyland visitor last fall, where coverage rates were even higher than in this study, added Dr. Lessin. “This phenomenon, unless forcefully remedied, could easily result in large outbreaks of other vaccine-preventable illness besides COVID-19,” he cautioned.
Dr. Bode and colleagues as well as Dr. Lessin had no conflicts of interest and no relevant financial disclosures.
SOURCE: Bode SM et al. Pediatrics. 2021. doi: 10.1542/peds.2020-035576.
Widespread use of the MMR vaccine is not only crucial for protecting the community against infectious outbreaks, but also serves as the overall pacesetter for preventive services, said Sara M. Bode, MD and colleagues at Nationwide Children’s Hospital in Columbus.
As part of a bivariate logistic regression analysis, Dr. Bode and colleagues sought to evaluate changes in measles vaccination rates across 12 clinic sites of the Nationwide Children’s Hospital pediatric primary care network in Columbus among 23,534 children aged 16 months. The study period targeted the time between April and May 2020, when clinic access and appointment attendance declined following the start of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic, until the June-to-August 2020 time period, when clinical care was allowed to return.
The need for the study was prompted by Centers for Disease Control and Prevention reporting on a state-specific precipitous decline in MMR vaccination rates shortly after the onset of COVID-19 in May 2020. Citing the results of one study, such reductions in vaccination have raised concerns over the possibility of a measles resurgence, noted Dr. Bode and associates.
MMR vaccination rates begin to drop with onset of COVID-19 pandemic.
From March 2017 to March 2020, the average rate of MMR vaccination in 16-month-olds was 72%. It subsequently decreased to 67% from April to May 2020, and then dropped further to 62% during the period June to August, 2020 (P = .001). Those without insurance were less likely to be vaccinated than were those carrying private insurance or Medicaid.
Among patients who had not attended a preventive care visit after 12 months of age, the proportion who received vaccines declined during the same time periods, from 10% before the pandemic to 6% at the start of the pandemic and 3% during the summer months of 2020.
“Given the baseline low vaccination rates even before the pandemic and the subsequent decline, we face a critical need to improve timely vaccination and provide catch-up opportunities” in areas with the highest incidence of COVID-19, observed Dr. Bode and colleagues.
Innovative approaches are needed to encourage families to seek preventive care.
In response, the researchers announced the implementation of new community-based vaccination approaches in Ohio, including pop-up vaccine clinics, mobile clinics, and school-based clinics to provide families, who are reluctant to visit health care facilities over COVID-19 related concerns, with safe alternatives. “We believe that it is critical to develop innovative approaches to have families return for preventive care,” they added.
In a separate interview, Herschel Lessin, MD, a private practice pediatrician in Poughkeepsie, N.Y., noted: “This study confirms the anecdotal experience of pediatricians around the country, and our greatest fear that the pandemic will interfere with herd immunity of children for vaccine-preventable illness. Although the study was of urban offices with a primarily Medicaid population, I believe the results to be very worrisome should they prove to be generalizable to the country, as a whole. The significant reduction of well-child visits due to COVID-19 (and fear of COVID-19) seriously impaired the vaccination status of a standard required vaccine in a large population. What is even more worrisome is that the rates continued to fall even after the initial closure of many offices and well into their reopening, despite concerted efforts to try to catch up these missed visits and immunizations.”
Measles is an intensely contagious illness that has not been eradicated, as evidenced by the enormous measles outbreak stemming from Disneyland in 2014-2015, and again with the possible exposure of hundreds to an infected Disneyland visitor last fall, where coverage rates were even higher than in this study, added Dr. Lessin. “This phenomenon, unless forcefully remedied, could easily result in large outbreaks of other vaccine-preventable illness besides COVID-19,” he cautioned.
Dr. Bode and colleagues as well as Dr. Lessin had no conflicts of interest and no relevant financial disclosures.
SOURCE: Bode SM et al. Pediatrics. 2021. doi: 10.1542/peds.2020-035576.
FROM PEDIATRICS
ASH guidelines for venous thromboembolism: What family physicians need to know
Each year in the United States, approximately one to two out of every thousand people suffer from venous thromboembolism (VTE), including deep vein thrombosis and pulmonary embolism. .
These guidelines, which were recently published in Blood Advances (Ortel T L et al. Blood Adv 2020 doi: 10.1182/bloodadvances.2020001830), include 28 recommendations.
How to treat uncomplicated patients
For uncomplicated deep vein thrombosis (DVT) and/or pulmonary embolism (PE), the guidelines suggest treating patients at home rather than in the hospital. This is especially important for family physicians to note as many of these patients will now be the responsibility of the primary care doctor to treat and follow. Patients treated at home can avoid the risk of nosocomial infections, especially in the days of COVID-19. Evidence also suggests that being treated at home was shown to reduce the risk of PE versus being treated in the hospital. It is, therefore, crucial that family physicians know which patients are low versus high risk.
Further, the guidelines suggest that these patients with low risk of complications are better treated with direct oral anticoagulants (DOACs) instead of vitamin K antagonists, such as Coumadin.
Medication-related suggestions
The guidelines also suggest that no DOAC is preferred over another. Since DOACs are relatively newer agents, family doctors need to become comfortable with their use. For proximal DVTs, anticoagulation alone can be used without thrombolytics.
Family physicians are often tasked with the decision on when to stop anticoagulation. The authors recommend against using diagnostic tests such as D-Dimer or ultrasound to decide when to stop these medications in low-risk patients. In patients at risk of recurrent VTE due to chronic medical conditions, it is suggested to continue anti-coagulants indefinitely. While anticoagulant therapy effectively reduces risk of VTE, it does increase the risk of bleeding events.
The guidelines are quite extensive and specific in their recommendations and family physicians need to understand them. We are often the first ones in the medical system to diagnose VTE, and it is quite possible to keep these patients home, thereby eliminating risks they may encounter by being hospitalized. In addition, the recommendation regarding the use of DOACs may ease some of the burden of monitoring patients on long-term Coumadin. These medications do not come without risks, and we must be comfortable evaluating for any complications. In our current health care system, different insurance companies have different formularies making it necessary for us to know all these medications.
In the past, the diagnosis of PE and even a DVT would mean a hospital stay. We now know, and these guidelines reaffirm, that this is not necessary in uncomplicated cases.
In addition to diagnosing VTE, family physicians are also tasked with following up with patients who were hospitalized or started on treatment by other physicians. We need to know the plan on when to stop the medication or when to reevaluate its use. Patients often bring this question to us, and these guidelines will help us answer that question.
Many patients who have more complicated medical conditions often see multiple specialists. The ASH recommendations help standardize the care of these patients across specialties.
What the recommendations are missing
As family doctors, we often treat patients with multiple comorbidities. These guidelines do not make recommendations for patients with cancer, who are at high risk of VTE events. Some patients also have conditions that increase their risk of bleeding or have contraindications to the use of anticoagulants. It would be helpful to have more recommendations for both of these types of patients in addition to the use of inferior vena cava filter in patients with proximal DVT. The document is also missing recommendations for pregnant patients, which would be useful.
Overall, these guidelines include much of what we already do in our practices while doing a great job of incorporating the newer DOACs. These guidelines are easy for family physicians to put into practice.
Dr. Girgis practices family medicine in South River, N.J., and is a clinical assistant professor of family medicine at Robert Wood Johnson Medical School, New Brunswick, N.J. You can contact her at [email protected].
Each year in the United States, approximately one to two out of every thousand people suffer from venous thromboembolism (VTE), including deep vein thrombosis and pulmonary embolism. .
These guidelines, which were recently published in Blood Advances (Ortel T L et al. Blood Adv 2020 doi: 10.1182/bloodadvances.2020001830), include 28 recommendations.
How to treat uncomplicated patients
For uncomplicated deep vein thrombosis (DVT) and/or pulmonary embolism (PE), the guidelines suggest treating patients at home rather than in the hospital. This is especially important for family physicians to note as many of these patients will now be the responsibility of the primary care doctor to treat and follow. Patients treated at home can avoid the risk of nosocomial infections, especially in the days of COVID-19. Evidence also suggests that being treated at home was shown to reduce the risk of PE versus being treated in the hospital. It is, therefore, crucial that family physicians know which patients are low versus high risk.
Further, the guidelines suggest that these patients with low risk of complications are better treated with direct oral anticoagulants (DOACs) instead of vitamin K antagonists, such as Coumadin.
Medication-related suggestions
The guidelines also suggest that no DOAC is preferred over another. Since DOACs are relatively newer agents, family doctors need to become comfortable with their use. For proximal DVTs, anticoagulation alone can be used without thrombolytics.
Family physicians are often tasked with the decision on when to stop anticoagulation. The authors recommend against using diagnostic tests such as D-Dimer or ultrasound to decide when to stop these medications in low-risk patients. In patients at risk of recurrent VTE due to chronic medical conditions, it is suggested to continue anti-coagulants indefinitely. While anticoagulant therapy effectively reduces risk of VTE, it does increase the risk of bleeding events.
The guidelines are quite extensive and specific in their recommendations and family physicians need to understand them. We are often the first ones in the medical system to diagnose VTE, and it is quite possible to keep these patients home, thereby eliminating risks they may encounter by being hospitalized. In addition, the recommendation regarding the use of DOACs may ease some of the burden of monitoring patients on long-term Coumadin. These medications do not come without risks, and we must be comfortable evaluating for any complications. In our current health care system, different insurance companies have different formularies making it necessary for us to know all these medications.
In the past, the diagnosis of PE and even a DVT would mean a hospital stay. We now know, and these guidelines reaffirm, that this is not necessary in uncomplicated cases.
In addition to diagnosing VTE, family physicians are also tasked with following up with patients who were hospitalized or started on treatment by other physicians. We need to know the plan on when to stop the medication or when to reevaluate its use. Patients often bring this question to us, and these guidelines will help us answer that question.
Many patients who have more complicated medical conditions often see multiple specialists. The ASH recommendations help standardize the care of these patients across specialties.
What the recommendations are missing
As family doctors, we often treat patients with multiple comorbidities. These guidelines do not make recommendations for patients with cancer, who are at high risk of VTE events. Some patients also have conditions that increase their risk of bleeding or have contraindications to the use of anticoagulants. It would be helpful to have more recommendations for both of these types of patients in addition to the use of inferior vena cava filter in patients with proximal DVT. The document is also missing recommendations for pregnant patients, which would be useful.
Overall, these guidelines include much of what we already do in our practices while doing a great job of incorporating the newer DOACs. These guidelines are easy for family physicians to put into practice.
Dr. Girgis practices family medicine in South River, N.J., and is a clinical assistant professor of family medicine at Robert Wood Johnson Medical School, New Brunswick, N.J. You can contact her at [email protected].
Each year in the United States, approximately one to two out of every thousand people suffer from venous thromboembolism (VTE), including deep vein thrombosis and pulmonary embolism. .
These guidelines, which were recently published in Blood Advances (Ortel T L et al. Blood Adv 2020 doi: 10.1182/bloodadvances.2020001830), include 28 recommendations.
How to treat uncomplicated patients
For uncomplicated deep vein thrombosis (DVT) and/or pulmonary embolism (PE), the guidelines suggest treating patients at home rather than in the hospital. This is especially important for family physicians to note as many of these patients will now be the responsibility of the primary care doctor to treat and follow. Patients treated at home can avoid the risk of nosocomial infections, especially in the days of COVID-19. Evidence also suggests that being treated at home was shown to reduce the risk of PE versus being treated in the hospital. It is, therefore, crucial that family physicians know which patients are low versus high risk.
Further, the guidelines suggest that these patients with low risk of complications are better treated with direct oral anticoagulants (DOACs) instead of vitamin K antagonists, such as Coumadin.
Medication-related suggestions
The guidelines also suggest that no DOAC is preferred over another. Since DOACs are relatively newer agents, family doctors need to become comfortable with their use. For proximal DVTs, anticoagulation alone can be used without thrombolytics.
Family physicians are often tasked with the decision on when to stop anticoagulation. The authors recommend against using diagnostic tests such as D-Dimer or ultrasound to decide when to stop these medications in low-risk patients. In patients at risk of recurrent VTE due to chronic medical conditions, it is suggested to continue anti-coagulants indefinitely. While anticoagulant therapy effectively reduces risk of VTE, it does increase the risk of bleeding events.
The guidelines are quite extensive and specific in their recommendations and family physicians need to understand them. We are often the first ones in the medical system to diagnose VTE, and it is quite possible to keep these patients home, thereby eliminating risks they may encounter by being hospitalized. In addition, the recommendation regarding the use of DOACs may ease some of the burden of monitoring patients on long-term Coumadin. These medications do not come without risks, and we must be comfortable evaluating for any complications. In our current health care system, different insurance companies have different formularies making it necessary for us to know all these medications.
In the past, the diagnosis of PE and even a DVT would mean a hospital stay. We now know, and these guidelines reaffirm, that this is not necessary in uncomplicated cases.
In addition to diagnosing VTE, family physicians are also tasked with following up with patients who were hospitalized or started on treatment by other physicians. We need to know the plan on when to stop the medication or when to reevaluate its use. Patients often bring this question to us, and these guidelines will help us answer that question.
Many patients who have more complicated medical conditions often see multiple specialists. The ASH recommendations help standardize the care of these patients across specialties.
What the recommendations are missing
As family doctors, we often treat patients with multiple comorbidities. These guidelines do not make recommendations for patients with cancer, who are at high risk of VTE events. Some patients also have conditions that increase their risk of bleeding or have contraindications to the use of anticoagulants. It would be helpful to have more recommendations for both of these types of patients in addition to the use of inferior vena cava filter in patients with proximal DVT. The document is also missing recommendations for pregnant patients, which would be useful.
Overall, these guidelines include much of what we already do in our practices while doing a great job of incorporating the newer DOACs. These guidelines are easy for family physicians to put into practice.
Dr. Girgis practices family medicine in South River, N.J., and is a clinical assistant professor of family medicine at Robert Wood Johnson Medical School, New Brunswick, N.J. You can contact her at [email protected].
The top pediatric articles of 2019
Updates in pediatric hospital medicine
The expansion of the field of pediatric hospital medicine in the past 30 years has resulted in improved health care outcomes for hospitalized children1,2 and has been accompanied by a robust increase in the amount of scholarly work related to the field.3 We performed a review of the literature published in 2019 to identify the 10 articles that had the most impact on pediatric hospital medicine, and presented the findings at HM20 Virtual, the 2020 annual conference of the Society of Hospital Medicine. Five of the selected articles are highlighted here.
STUDY 1
Wechsler ME et al. Step-up therapy in black children and adults with poorly controlled asthma. N Engl J Med. 2019 Sep 26;381(13):1227-39.
Background
Current pediatric asthma guidelines suggest adding a long-acting beta-agonist (LABA) to inhaled corticosteroid (ICS) therapy, rather than increasing the ICS dose, for children with poorly controlled asthma. However, these data are based on trials with disproportionately few Black subjects. This study aimed to determine the best step-up therapy for Black patients whose asthma was poorly controlled on ICS monotherapy.
Study overview and results
The authors reported two parallel double-blind, randomized, controlled trials, one in children and one in adolescents and adults. The study of children included 280 subjects ranging in age from 5 to 11, with at least one Black grandparent, and with poorly controlled asthma on low-dose ICS therapy. It used a four-way crossover design in which each subject was treated with four different 14-week treatment regimens: either double (medium-dose) or quintuple (high-dose) their baseline ICS dose, with or without the addition of a LABA. A superior response was defined by the composite outcome of at least one fewer asthma exacerbation, more asthma-control days, or a 5–percentage point difference in predicted FEV1. Forty-six percent of children had improved asthma outcomes when the ICS dose was increased rather than with the addition of a LABA. In contrast, Black adolescents and Black adults had superior responses to the addition of a LABA. There was no significant interaction between the percentage of African ancestry as determined by DNA genotyping and the primary composite outcome. High-dose ICS was associated with a decrease in the ratio of urinary cortisol to creatinine in children younger than 8 years.
Limitations
Approximately 25% of children dropped out of the study, with disproportionately more children dropping out while on a high-dose ICS regimen. Additionally, the difference in the composite outcome was primarily driven by differences in FEV1, with few subjects demonstrating a difference in asthma exacerbations or asthma-control days. Although a decrease in urinary cortisol to creatinine ratio was noted in children under 8 on high-dose ICS, the study period was not long enough to determine the clinical implications of this finding.
Important findings and implications
While studies with a majority of white children have suggested a superior response from adding a LABA compared to increasing the dose of an ICS, almost half of Black children showed a superior response when the dose of an ICS was increased rather than adding a LABA. It is important to note that current guidelines are based on studies with a disproportionate majority of white subjects and may not accurately reflect optimal care for patients in other racial groups. This study underscores the need to include a diverse patient population in research studies.
STUDY 2
Chang PW, Newman TB. A simpler prediction rule for rebound hyperbilirubinemia. Pediatrics. 2019 Jul;144(1):e20183712.
Background
Hyperbilirubinemia (jaundice) is estimated to affect 50%-60% of all newborns. Rebound hyperbilirubinemia – a rise in bilirubin after cessation of phototherapy – is common and can lead to recently discharged infants being readmitted for additional therapy. Lack of clear guidelines regarding when to discharge infants with hyperbilirubinemia has likely contributed to practice variation and some trepidation regarding whether a bilirubin level is “low enough” to discontinue therapy.
Study overview and results
The authors had previously proposed a three-factor hyperbilirubinemia risk model and sought to simplify their rule further.4 They examined a retrospective cohort of 7,048 infants greater than or equal to 35 weeks’ gestation using a random split sample. The authors derived a two-factor model using the same methods and compared its performance to the three-factor model. The two-factor formula was shown to be a good fit as a logistic regression model (Hosmer-Lemeshow test 9.21; P = .33), and the AUROC (area under the receiver operating characteristic) curves for the derivation and validation cohorts were similar between the two-factor (0.877 and 0.876, respectively) and three-factor risk models (0.887 and 0.881, respectively).
Limitations
These data are limited to infants receiving their first treatment of phototherapy and have not been externally validated. An important variable, serum bilirubin at phototherapy termination, was estimated in most subjects, which may have affected the accuracy of the prediction rule. Whether infants received home phototherapy was based only on equipment orders, and some infants may have received phototherapy unbeknownst to investigators. Last, infants with rebound hyperbilirubinemia at less than 72 hours after phototherapy discontinuation may have been missed.
Important findings and implications
This prediction model provides evidence-based, concrete data that can be used in making joint decisions with families regarding discharge timing of infants with hyperbilirubinemia. It also could be beneficial when deciding appropriate follow-up time after discharge.
STUDY 3
Ramgopal S et al. Risk of serious bacterial infection in infants aged ≤60 days presenting to emergency departments with a history of fever only. J Pediatr. 2019 Jan;204:191-195. doi: 10.1016/j.jpeds.2018.08.043.
Background
Febrile infants aged 60 days and younger are at risk for serious bacterial infections (SBI) including urinary tract infections (UTI), bacteremia, and meningitis. As physical exam is a poor discriminator of SBI in this age group, providers frequently rely on laboratory values and risk factors to guide management. Infants presenting with documented fevers by caregivers but found to have no fever in the emergency department are a challenge, and there are limited data regarding SBI frequency in this population.
Study overview and results
The authors performed a secondary analysis of a prospectively gathered cohort of infants aged 60 days and younger within the Pediatric Emergency Care Applied Research Network (PECARN) who had blood, urine, and CSF data available. Notable exclusions included infants who were premature, had a focal infection, were clinically ill, had recent antibiotic use, did not have blood, urine, and CSF data available, or were lost to telephone follow-up at 7 days to ensure wellness. The study cohort included 6,014 infants, 1,233 (32%) who were febrile by history alone. Rates of overall SBI were lower in the afebrile group (8.8% vs. 12.8%). For infants 0-28 days, rates of UTI were lower for the afebrile group (9.5% vs. 14.5%), but there was no difference in the rates of bacteremia or meningitis. For infants 29-60 days, rates of UTI (6.6% vs. 9.3%) and bacteremia (.5% vs. 1.7%) were lower in the afebrile group.
Limitations
Neither the use of home antipyretics nor the method of temperature taking at home were studied. Also, as this was a secondary analysis, it is possible that not all infants who presented with history of fever only were captured, as work-up was dictated by individual treating providers who may have chosen not to work up certain afebrile infants.
Important findings and implications
Nearly one-third of infants presenting for fever evaluation are afebrile on arrival. Although overall rates of SBI were lower in the group with fever by history only, this difference is largely accounted for by differing rates of UTI. Rates of bacteremia and meningitis remained substantial between groups, particularly for infants aged 0-28 days. Because of the significant morbidity associated with these infections, it is reasonable to suggest that absence of fever on presentation alone should not alter clinical or laboratory work-up, particularly in infants 0-28 days.
STUDY 4
Humphrey-Murto S et al. The influence of prior performance information on ratings of current performance and implications for learner handover: A scoping review. Acad Med. 2019 Jul;94(7):1050-7.
Background
Learner Handover (LH) or “forward feeding” occurs when information about trainees is shared between faculty supervisors. Although this can be helpful to tailor educational experiences and build upon previous assessments, it risks stigmatizing trainees and adding bias to future feedback and assessments as the trainee never really has a “clean slate.” In this study, the authors sought to uncover the key concepts of how prior performance information (PPI) influences assessments and any implications for medical education.
Study overview and results
The authors performed a cross-disciplinary scoping review looking at over 17,000 articles published between 1980 and 2017 across the domains of psychology, sports, business, and education. Seven themes were identified with the following notable findings. Raters exposed to positive PPI scored a learner’s performance higher, and vice versa. There was a dose-response relationship with more positive and more negative PPI resulting in higher and lower assessments, respectively. General standards, such as a direction to complete all work in a timely manner, caused an assimilation effect, while specific standards, such as a direction to complete a certain task by a certain day, did not. More motivated and more experienced raters are less affected by PPI, and those who believe that people can change (incremental theorists) are less affected by PPI while those who believe personal attributes are fixed (entity theorists) are more affected.
Limitations
The heterogeneity of the studies and the fact that they were largely conducted in experimental settings may limit generalizability to medical education. Slightly less than half of the studies included a control arm. Last, most of the studies looked at the ratings of only one target performance, not multiple performances over time.
Important findings and implications
Ratings of current performance displace toward PPI direction, with negative PPI more influential than positive PPI. In a formative setting, PPI may help the assessor focus on areas of possible weakness. In contrast, for a summative assessment, PPI may be prejudicial and have an impact on the rating given to the student. Clinicians should be mindful of the information they share with future raters about learners and the potential bias on future assessments that can manifest as a result.
STUDY 5
McCann ME et al. Neurodevelopmental outcome at 5 years of age after general anaesthesia or awake-regional anaesthesia in infancy (GAS): An international, multicentre, randomised, controlled equivalence trial. The Lancet. 2019 Feb;393:664-77.
Background
Animal models and observational studies have suggested a link between early anesthesia exposure and adverse neurocognitive outcomes; however, findings have been mixed and studies are prone to confounding. This study is the first randomized controlled trial to compare neurocognitive outcomes for infants exposed to general anesthesia versus awake-regional anesthesia.
Study overview and results
In this international, multicenter, assessor-masked trial, 722 infants undergoing inguinal hernia repair were randomized to awake-regional anesthesia or single-agent sevoflurane-based general anesthesia. Infants born at greater than 26 weeks’ gestational age were eligible, while those with prior anesthesia exposure or risks for neurocognitive delay were excluded. The primary outcome was full-scale intelligence quotient (FSIQ) testing at 5 years of age on the Wechsler Preschool and Primary Scale of Intelligence, third edition (WPPSI-III). Seven additional neurodevelopmental assessments and parental questionnaires regarding behavior were administered as secondary outcomes. Average anesthesia exposure was 54 minutes and no infant had exposure greater than 120 minutes. There was no significant difference in mean scores on WPPSI-III FSIQ testing, and no difference in the additional neurocognitive assessments or parent-reported outcomes used as secondary outcomes.
Limitations
This study was limited to single, short periods of single-agent anesthesia exposure in children with no additional neurologic risk factors, so caution should be used in extrapolating these data to children with medical complexity and children undergoing multiple procedures, longer surgeries, or multidrug anesthetic regimens. The study population was majority male because of the surgical pathology selected and included only children in the narrow range of postmenstrual age 60 weeks or less. While this population represents a suspected a period of high cerebral vulnerability based on animal models, the implications of anesthesia exposure at other ages are unclear.
Important findings and implications
An estimated 10% of children from developed countries are exposed to general anesthesia during the first 3 years of life. While hospitalists do not typically select the route of anesthesia, they frequently care for patients undergoing procedures and must address parental concerns regarding the safety of anesthesia exposure. Given the rigorous study methods and long-term follow up in the current study, these data should provide reassurance that, for healthy infants undergoing short, single-agent anesthetic exposure, there is no evidence of future adverse neurologic outcomes.
Dr. Russo is director of pediatrics, medical director for quality and innovation, at WellSpan Health, York, Pa. Dr. Money is a pediatric hospitalist at Primary Children’s Hospital, University of Utah School of Medicine, Salt Lake City. Dr. Steed is instructor of hospital medicine, Northwestern Memorial Hospital and Ann and Robert H. Lurie Children’s Hospital of Chicago, Northwestern University School of Medicine, Chicago. The authors would like to thank Dr. Klint M. Schwenk and the Society for Hospital Medicine Pediatric Special Interest Group Executive Council.
References
1. Roberts KB, Fisher ER, and Rauch DA. The history of pediatric hospital medicine in the United States, 1996-2019. J Hosp Med. 2020 Jul;15(7):424-7.
2. Mussman GM and Conway PH. Pediatric hospitalist systems versus traditional models of care: Effect on quality and cost outcomes. J Hosp Med. 2012 Apr;7(4):350-7.
3. Wang ME, Shaughnessy EE, and Leyenaar JK. The future of pediatric hospital medicine: Challenges and opportunities. J Hosp Med. 2020 Jul;15(7):428-30.
4. Chang PW et al. A clinical prediction rule for rebound hyperbilirubinemia following inpatient phototherapy. Pediatrics. 2017;139 Mar;139(3):e20162896.
Updates in pediatric hospital medicine
Updates in pediatric hospital medicine
The expansion of the field of pediatric hospital medicine in the past 30 years has resulted in improved health care outcomes for hospitalized children1,2 and has been accompanied by a robust increase in the amount of scholarly work related to the field.3 We performed a review of the literature published in 2019 to identify the 10 articles that had the most impact on pediatric hospital medicine, and presented the findings at HM20 Virtual, the 2020 annual conference of the Society of Hospital Medicine. Five of the selected articles are highlighted here.
STUDY 1
Wechsler ME et al. Step-up therapy in black children and adults with poorly controlled asthma. N Engl J Med. 2019 Sep 26;381(13):1227-39.
Background
Current pediatric asthma guidelines suggest adding a long-acting beta-agonist (LABA) to inhaled corticosteroid (ICS) therapy, rather than increasing the ICS dose, for children with poorly controlled asthma. However, these data are based on trials with disproportionately few Black subjects. This study aimed to determine the best step-up therapy for Black patients whose asthma was poorly controlled on ICS monotherapy.
Study overview and results
The authors reported two parallel double-blind, randomized, controlled trials, one in children and one in adolescents and adults. The study of children included 280 subjects ranging in age from 5 to 11, with at least one Black grandparent, and with poorly controlled asthma on low-dose ICS therapy. It used a four-way crossover design in which each subject was treated with four different 14-week treatment regimens: either double (medium-dose) or quintuple (high-dose) their baseline ICS dose, with or without the addition of a LABA. A superior response was defined by the composite outcome of at least one fewer asthma exacerbation, more asthma-control days, or a 5–percentage point difference in predicted FEV1. Forty-six percent of children had improved asthma outcomes when the ICS dose was increased rather than with the addition of a LABA. In contrast, Black adolescents and Black adults had superior responses to the addition of a LABA. There was no significant interaction between the percentage of African ancestry as determined by DNA genotyping and the primary composite outcome. High-dose ICS was associated with a decrease in the ratio of urinary cortisol to creatinine in children younger than 8 years.
Limitations
Approximately 25% of children dropped out of the study, with disproportionately more children dropping out while on a high-dose ICS regimen. Additionally, the difference in the composite outcome was primarily driven by differences in FEV1, with few subjects demonstrating a difference in asthma exacerbations or asthma-control days. Although a decrease in urinary cortisol to creatinine ratio was noted in children under 8 on high-dose ICS, the study period was not long enough to determine the clinical implications of this finding.
Important findings and implications
While studies with a majority of white children have suggested a superior response from adding a LABA compared to increasing the dose of an ICS, almost half of Black children showed a superior response when the dose of an ICS was increased rather than adding a LABA. It is important to note that current guidelines are based on studies with a disproportionate majority of white subjects and may not accurately reflect optimal care for patients in other racial groups. This study underscores the need to include a diverse patient population in research studies.
STUDY 2
Chang PW, Newman TB. A simpler prediction rule for rebound hyperbilirubinemia. Pediatrics. 2019 Jul;144(1):e20183712.
Background
Hyperbilirubinemia (jaundice) is estimated to affect 50%-60% of all newborns. Rebound hyperbilirubinemia – a rise in bilirubin after cessation of phototherapy – is common and can lead to recently discharged infants being readmitted for additional therapy. Lack of clear guidelines regarding when to discharge infants with hyperbilirubinemia has likely contributed to practice variation and some trepidation regarding whether a bilirubin level is “low enough” to discontinue therapy.
Study overview and results
The authors had previously proposed a three-factor hyperbilirubinemia risk model and sought to simplify their rule further.4 They examined a retrospective cohort of 7,048 infants greater than or equal to 35 weeks’ gestation using a random split sample. The authors derived a two-factor model using the same methods and compared its performance to the three-factor model. The two-factor formula was shown to be a good fit as a logistic regression model (Hosmer-Lemeshow test 9.21; P = .33), and the AUROC (area under the receiver operating characteristic) curves for the derivation and validation cohorts were similar between the two-factor (0.877 and 0.876, respectively) and three-factor risk models (0.887 and 0.881, respectively).
Limitations
These data are limited to infants receiving their first treatment of phototherapy and have not been externally validated. An important variable, serum bilirubin at phototherapy termination, was estimated in most subjects, which may have affected the accuracy of the prediction rule. Whether infants received home phototherapy was based only on equipment orders, and some infants may have received phototherapy unbeknownst to investigators. Last, infants with rebound hyperbilirubinemia at less than 72 hours after phototherapy discontinuation may have been missed.
Important findings and implications
This prediction model provides evidence-based, concrete data that can be used in making joint decisions with families regarding discharge timing of infants with hyperbilirubinemia. It also could be beneficial when deciding appropriate follow-up time after discharge.
STUDY 3
Ramgopal S et al. Risk of serious bacterial infection in infants aged ≤60 days presenting to emergency departments with a history of fever only. J Pediatr. 2019 Jan;204:191-195. doi: 10.1016/j.jpeds.2018.08.043.
Background
Febrile infants aged 60 days and younger are at risk for serious bacterial infections (SBI) including urinary tract infections (UTI), bacteremia, and meningitis. As physical exam is a poor discriminator of SBI in this age group, providers frequently rely on laboratory values and risk factors to guide management. Infants presenting with documented fevers by caregivers but found to have no fever in the emergency department are a challenge, and there are limited data regarding SBI frequency in this population.
Study overview and results
The authors performed a secondary analysis of a prospectively gathered cohort of infants aged 60 days and younger within the Pediatric Emergency Care Applied Research Network (PECARN) who had blood, urine, and CSF data available. Notable exclusions included infants who were premature, had a focal infection, were clinically ill, had recent antibiotic use, did not have blood, urine, and CSF data available, or were lost to telephone follow-up at 7 days to ensure wellness. The study cohort included 6,014 infants, 1,233 (32%) who were febrile by history alone. Rates of overall SBI were lower in the afebrile group (8.8% vs. 12.8%). For infants 0-28 days, rates of UTI were lower for the afebrile group (9.5% vs. 14.5%), but there was no difference in the rates of bacteremia or meningitis. For infants 29-60 days, rates of UTI (6.6% vs. 9.3%) and bacteremia (.5% vs. 1.7%) were lower in the afebrile group.
Limitations
Neither the use of home antipyretics nor the method of temperature taking at home were studied. Also, as this was a secondary analysis, it is possible that not all infants who presented with history of fever only were captured, as work-up was dictated by individual treating providers who may have chosen not to work up certain afebrile infants.
Important findings and implications
Nearly one-third of infants presenting for fever evaluation are afebrile on arrival. Although overall rates of SBI were lower in the group with fever by history only, this difference is largely accounted for by differing rates of UTI. Rates of bacteremia and meningitis remained substantial between groups, particularly for infants aged 0-28 days. Because of the significant morbidity associated with these infections, it is reasonable to suggest that absence of fever on presentation alone should not alter clinical or laboratory work-up, particularly in infants 0-28 days.
STUDY 4
Humphrey-Murto S et al. The influence of prior performance information on ratings of current performance and implications for learner handover: A scoping review. Acad Med. 2019 Jul;94(7):1050-7.
Background
Learner Handover (LH) or “forward feeding” occurs when information about trainees is shared between faculty supervisors. Although this can be helpful to tailor educational experiences and build upon previous assessments, it risks stigmatizing trainees and adding bias to future feedback and assessments as the trainee never really has a “clean slate.” In this study, the authors sought to uncover the key concepts of how prior performance information (PPI) influences assessments and any implications for medical education.
Study overview and results
The authors performed a cross-disciplinary scoping review looking at over 17,000 articles published between 1980 and 2017 across the domains of psychology, sports, business, and education. Seven themes were identified with the following notable findings. Raters exposed to positive PPI scored a learner’s performance higher, and vice versa. There was a dose-response relationship with more positive and more negative PPI resulting in higher and lower assessments, respectively. General standards, such as a direction to complete all work in a timely manner, caused an assimilation effect, while specific standards, such as a direction to complete a certain task by a certain day, did not. More motivated and more experienced raters are less affected by PPI, and those who believe that people can change (incremental theorists) are less affected by PPI while those who believe personal attributes are fixed (entity theorists) are more affected.
Limitations
The heterogeneity of the studies and the fact that they were largely conducted in experimental settings may limit generalizability to medical education. Slightly less than half of the studies included a control arm. Last, most of the studies looked at the ratings of only one target performance, not multiple performances over time.
Important findings and implications
Ratings of current performance displace toward PPI direction, with negative PPI more influential than positive PPI. In a formative setting, PPI may help the assessor focus on areas of possible weakness. In contrast, for a summative assessment, PPI may be prejudicial and have an impact on the rating given to the student. Clinicians should be mindful of the information they share with future raters about learners and the potential bias on future assessments that can manifest as a result.
STUDY 5
McCann ME et al. Neurodevelopmental outcome at 5 years of age after general anaesthesia or awake-regional anaesthesia in infancy (GAS): An international, multicentre, randomised, controlled equivalence trial. The Lancet. 2019 Feb;393:664-77.
Background
Animal models and observational studies have suggested a link between early anesthesia exposure and adverse neurocognitive outcomes; however, findings have been mixed and studies are prone to confounding. This study is the first randomized controlled trial to compare neurocognitive outcomes for infants exposed to general anesthesia versus awake-regional anesthesia.
Study overview and results
In this international, multicenter, assessor-masked trial, 722 infants undergoing inguinal hernia repair were randomized to awake-regional anesthesia or single-agent sevoflurane-based general anesthesia. Infants born at greater than 26 weeks’ gestational age were eligible, while those with prior anesthesia exposure or risks for neurocognitive delay were excluded. The primary outcome was full-scale intelligence quotient (FSIQ) testing at 5 years of age on the Wechsler Preschool and Primary Scale of Intelligence, third edition (WPPSI-III). Seven additional neurodevelopmental assessments and parental questionnaires regarding behavior were administered as secondary outcomes. Average anesthesia exposure was 54 minutes and no infant had exposure greater than 120 minutes. There was no significant difference in mean scores on WPPSI-III FSIQ testing, and no difference in the additional neurocognitive assessments or parent-reported outcomes used as secondary outcomes.
Limitations
This study was limited to single, short periods of single-agent anesthesia exposure in children with no additional neurologic risk factors, so caution should be used in extrapolating these data to children with medical complexity and children undergoing multiple procedures, longer surgeries, or multidrug anesthetic regimens. The study population was majority male because of the surgical pathology selected and included only children in the narrow range of postmenstrual age 60 weeks or less. While this population represents a suspected a period of high cerebral vulnerability based on animal models, the implications of anesthesia exposure at other ages are unclear.
Important findings and implications
An estimated 10% of children from developed countries are exposed to general anesthesia during the first 3 years of life. While hospitalists do not typically select the route of anesthesia, they frequently care for patients undergoing procedures and must address parental concerns regarding the safety of anesthesia exposure. Given the rigorous study methods and long-term follow up in the current study, these data should provide reassurance that, for healthy infants undergoing short, single-agent anesthetic exposure, there is no evidence of future adverse neurologic outcomes.
Dr. Russo is director of pediatrics, medical director for quality and innovation, at WellSpan Health, York, Pa. Dr. Money is a pediatric hospitalist at Primary Children’s Hospital, University of Utah School of Medicine, Salt Lake City. Dr. Steed is instructor of hospital medicine, Northwestern Memorial Hospital and Ann and Robert H. Lurie Children’s Hospital of Chicago, Northwestern University School of Medicine, Chicago. The authors would like to thank Dr. Klint M. Schwenk and the Society for Hospital Medicine Pediatric Special Interest Group Executive Council.
References
1. Roberts KB, Fisher ER, and Rauch DA. The history of pediatric hospital medicine in the United States, 1996-2019. J Hosp Med. 2020 Jul;15(7):424-7.
2. Mussman GM and Conway PH. Pediatric hospitalist systems versus traditional models of care: Effect on quality and cost outcomes. J Hosp Med. 2012 Apr;7(4):350-7.
3. Wang ME, Shaughnessy EE, and Leyenaar JK. The future of pediatric hospital medicine: Challenges and opportunities. J Hosp Med. 2020 Jul;15(7):428-30.
4. Chang PW et al. A clinical prediction rule for rebound hyperbilirubinemia following inpatient phototherapy. Pediatrics. 2017;139 Mar;139(3):e20162896.
The expansion of the field of pediatric hospital medicine in the past 30 years has resulted in improved health care outcomes for hospitalized children1,2 and has been accompanied by a robust increase in the amount of scholarly work related to the field.3 We performed a review of the literature published in 2019 to identify the 10 articles that had the most impact on pediatric hospital medicine, and presented the findings at HM20 Virtual, the 2020 annual conference of the Society of Hospital Medicine. Five of the selected articles are highlighted here.
STUDY 1
Wechsler ME et al. Step-up therapy in black children and adults with poorly controlled asthma. N Engl J Med. 2019 Sep 26;381(13):1227-39.
Background
Current pediatric asthma guidelines suggest adding a long-acting beta-agonist (LABA) to inhaled corticosteroid (ICS) therapy, rather than increasing the ICS dose, for children with poorly controlled asthma. However, these data are based on trials with disproportionately few Black subjects. This study aimed to determine the best step-up therapy for Black patients whose asthma was poorly controlled on ICS monotherapy.
Study overview and results
The authors reported two parallel double-blind, randomized, controlled trials, one in children and one in adolescents and adults. The study of children included 280 subjects ranging in age from 5 to 11, with at least one Black grandparent, and with poorly controlled asthma on low-dose ICS therapy. It used a four-way crossover design in which each subject was treated with four different 14-week treatment regimens: either double (medium-dose) or quintuple (high-dose) their baseline ICS dose, with or without the addition of a LABA. A superior response was defined by the composite outcome of at least one fewer asthma exacerbation, more asthma-control days, or a 5–percentage point difference in predicted FEV1. Forty-six percent of children had improved asthma outcomes when the ICS dose was increased rather than with the addition of a LABA. In contrast, Black adolescents and Black adults had superior responses to the addition of a LABA. There was no significant interaction between the percentage of African ancestry as determined by DNA genotyping and the primary composite outcome. High-dose ICS was associated with a decrease in the ratio of urinary cortisol to creatinine in children younger than 8 years.
Limitations
Approximately 25% of children dropped out of the study, with disproportionately more children dropping out while on a high-dose ICS regimen. Additionally, the difference in the composite outcome was primarily driven by differences in FEV1, with few subjects demonstrating a difference in asthma exacerbations or asthma-control days. Although a decrease in urinary cortisol to creatinine ratio was noted in children under 8 on high-dose ICS, the study period was not long enough to determine the clinical implications of this finding.
Important findings and implications
While studies with a majority of white children have suggested a superior response from adding a LABA compared to increasing the dose of an ICS, almost half of Black children showed a superior response when the dose of an ICS was increased rather than adding a LABA. It is important to note that current guidelines are based on studies with a disproportionate majority of white subjects and may not accurately reflect optimal care for patients in other racial groups. This study underscores the need to include a diverse patient population in research studies.
STUDY 2
Chang PW, Newman TB. A simpler prediction rule for rebound hyperbilirubinemia. Pediatrics. 2019 Jul;144(1):e20183712.
Background
Hyperbilirubinemia (jaundice) is estimated to affect 50%-60% of all newborns. Rebound hyperbilirubinemia – a rise in bilirubin after cessation of phototherapy – is common and can lead to recently discharged infants being readmitted for additional therapy. Lack of clear guidelines regarding when to discharge infants with hyperbilirubinemia has likely contributed to practice variation and some trepidation regarding whether a bilirubin level is “low enough” to discontinue therapy.
Study overview and results
The authors had previously proposed a three-factor hyperbilirubinemia risk model and sought to simplify their rule further.4 They examined a retrospective cohort of 7,048 infants greater than or equal to 35 weeks’ gestation using a random split sample. The authors derived a two-factor model using the same methods and compared its performance to the three-factor model. The two-factor formula was shown to be a good fit as a logistic regression model (Hosmer-Lemeshow test 9.21; P = .33), and the AUROC (area under the receiver operating characteristic) curves for the derivation and validation cohorts were similar between the two-factor (0.877 and 0.876, respectively) and three-factor risk models (0.887 and 0.881, respectively).
Limitations
These data are limited to infants receiving their first treatment of phototherapy and have not been externally validated. An important variable, serum bilirubin at phototherapy termination, was estimated in most subjects, which may have affected the accuracy of the prediction rule. Whether infants received home phototherapy was based only on equipment orders, and some infants may have received phototherapy unbeknownst to investigators. Last, infants with rebound hyperbilirubinemia at less than 72 hours after phototherapy discontinuation may have been missed.
Important findings and implications
This prediction model provides evidence-based, concrete data that can be used in making joint decisions with families regarding discharge timing of infants with hyperbilirubinemia. It also could be beneficial when deciding appropriate follow-up time after discharge.
STUDY 3
Ramgopal S et al. Risk of serious bacterial infection in infants aged ≤60 days presenting to emergency departments with a history of fever only. J Pediatr. 2019 Jan;204:191-195. doi: 10.1016/j.jpeds.2018.08.043.
Background
Febrile infants aged 60 days and younger are at risk for serious bacterial infections (SBI) including urinary tract infections (UTI), bacteremia, and meningitis. As physical exam is a poor discriminator of SBI in this age group, providers frequently rely on laboratory values and risk factors to guide management. Infants presenting with documented fevers by caregivers but found to have no fever in the emergency department are a challenge, and there are limited data regarding SBI frequency in this population.
Study overview and results
The authors performed a secondary analysis of a prospectively gathered cohort of infants aged 60 days and younger within the Pediatric Emergency Care Applied Research Network (PECARN) who had blood, urine, and CSF data available. Notable exclusions included infants who were premature, had a focal infection, were clinically ill, had recent antibiotic use, did not have blood, urine, and CSF data available, or were lost to telephone follow-up at 7 days to ensure wellness. The study cohort included 6,014 infants, 1,233 (32%) who were febrile by history alone. Rates of overall SBI were lower in the afebrile group (8.8% vs. 12.8%). For infants 0-28 days, rates of UTI were lower for the afebrile group (9.5% vs. 14.5%), but there was no difference in the rates of bacteremia or meningitis. For infants 29-60 days, rates of UTI (6.6% vs. 9.3%) and bacteremia (.5% vs. 1.7%) were lower in the afebrile group.
Limitations
Neither the use of home antipyretics nor the method of temperature taking at home were studied. Also, as this was a secondary analysis, it is possible that not all infants who presented with history of fever only were captured, as work-up was dictated by individual treating providers who may have chosen not to work up certain afebrile infants.
Important findings and implications
Nearly one-third of infants presenting for fever evaluation are afebrile on arrival. Although overall rates of SBI were lower in the group with fever by history only, this difference is largely accounted for by differing rates of UTI. Rates of bacteremia and meningitis remained substantial between groups, particularly for infants aged 0-28 days. Because of the significant morbidity associated with these infections, it is reasonable to suggest that absence of fever on presentation alone should not alter clinical or laboratory work-up, particularly in infants 0-28 days.
STUDY 4
Humphrey-Murto S et al. The influence of prior performance information on ratings of current performance and implications for learner handover: A scoping review. Acad Med. 2019 Jul;94(7):1050-7.
Background
Learner Handover (LH) or “forward feeding” occurs when information about trainees is shared between faculty supervisors. Although this can be helpful to tailor educational experiences and build upon previous assessments, it risks stigmatizing trainees and adding bias to future feedback and assessments as the trainee never really has a “clean slate.” In this study, the authors sought to uncover the key concepts of how prior performance information (PPI) influences assessments and any implications for medical education.
Study overview and results
The authors performed a cross-disciplinary scoping review looking at over 17,000 articles published between 1980 and 2017 across the domains of psychology, sports, business, and education. Seven themes were identified with the following notable findings. Raters exposed to positive PPI scored a learner’s performance higher, and vice versa. There was a dose-response relationship with more positive and more negative PPI resulting in higher and lower assessments, respectively. General standards, such as a direction to complete all work in a timely manner, caused an assimilation effect, while specific standards, such as a direction to complete a certain task by a certain day, did not. More motivated and more experienced raters are less affected by PPI, and those who believe that people can change (incremental theorists) are less affected by PPI while those who believe personal attributes are fixed (entity theorists) are more affected.
Limitations
The heterogeneity of the studies and the fact that they were largely conducted in experimental settings may limit generalizability to medical education. Slightly less than half of the studies included a control arm. Last, most of the studies looked at the ratings of only one target performance, not multiple performances over time.
Important findings and implications
Ratings of current performance displace toward PPI direction, with negative PPI more influential than positive PPI. In a formative setting, PPI may help the assessor focus on areas of possible weakness. In contrast, for a summative assessment, PPI may be prejudicial and have an impact on the rating given to the student. Clinicians should be mindful of the information they share with future raters about learners and the potential bias on future assessments that can manifest as a result.
STUDY 5
McCann ME et al. Neurodevelopmental outcome at 5 years of age after general anaesthesia or awake-regional anaesthesia in infancy (GAS): An international, multicentre, randomised, controlled equivalence trial. The Lancet. 2019 Feb;393:664-77.
Background
Animal models and observational studies have suggested a link between early anesthesia exposure and adverse neurocognitive outcomes; however, findings have been mixed and studies are prone to confounding. This study is the first randomized controlled trial to compare neurocognitive outcomes for infants exposed to general anesthesia versus awake-regional anesthesia.
Study overview and results
In this international, multicenter, assessor-masked trial, 722 infants undergoing inguinal hernia repair were randomized to awake-regional anesthesia or single-agent sevoflurane-based general anesthesia. Infants born at greater than 26 weeks’ gestational age were eligible, while those with prior anesthesia exposure or risks for neurocognitive delay were excluded. The primary outcome was full-scale intelligence quotient (FSIQ) testing at 5 years of age on the Wechsler Preschool and Primary Scale of Intelligence, third edition (WPPSI-III). Seven additional neurodevelopmental assessments and parental questionnaires regarding behavior were administered as secondary outcomes. Average anesthesia exposure was 54 minutes and no infant had exposure greater than 120 minutes. There was no significant difference in mean scores on WPPSI-III FSIQ testing, and no difference in the additional neurocognitive assessments or parent-reported outcomes used as secondary outcomes.
Limitations
This study was limited to single, short periods of single-agent anesthesia exposure in children with no additional neurologic risk factors, so caution should be used in extrapolating these data to children with medical complexity and children undergoing multiple procedures, longer surgeries, or multidrug anesthetic regimens. The study population was majority male because of the surgical pathology selected and included only children in the narrow range of postmenstrual age 60 weeks or less. While this population represents a suspected a period of high cerebral vulnerability based on animal models, the implications of anesthesia exposure at other ages are unclear.
Important findings and implications
An estimated 10% of children from developed countries are exposed to general anesthesia during the first 3 years of life. While hospitalists do not typically select the route of anesthesia, they frequently care for patients undergoing procedures and must address parental concerns regarding the safety of anesthesia exposure. Given the rigorous study methods and long-term follow up in the current study, these data should provide reassurance that, for healthy infants undergoing short, single-agent anesthetic exposure, there is no evidence of future adverse neurologic outcomes.
Dr. Russo is director of pediatrics, medical director for quality and innovation, at WellSpan Health, York, Pa. Dr. Money is a pediatric hospitalist at Primary Children’s Hospital, University of Utah School of Medicine, Salt Lake City. Dr. Steed is instructor of hospital medicine, Northwestern Memorial Hospital and Ann and Robert H. Lurie Children’s Hospital of Chicago, Northwestern University School of Medicine, Chicago. The authors would like to thank Dr. Klint M. Schwenk and the Society for Hospital Medicine Pediatric Special Interest Group Executive Council.
References
1. Roberts KB, Fisher ER, and Rauch DA. The history of pediatric hospital medicine in the United States, 1996-2019. J Hosp Med. 2020 Jul;15(7):424-7.
2. Mussman GM and Conway PH. Pediatric hospitalist systems versus traditional models of care: Effect on quality and cost outcomes. J Hosp Med. 2012 Apr;7(4):350-7.
3. Wang ME, Shaughnessy EE, and Leyenaar JK. The future of pediatric hospital medicine: Challenges and opportunities. J Hosp Med. 2020 Jul;15(7):428-30.
4. Chang PW et al. A clinical prediction rule for rebound hyperbilirubinemia following inpatient phototherapy. Pediatrics. 2017;139 Mar;139(3):e20162896.
Nicotine vaping tapers off among teens
Levels of nicotine and marijuana vaping among adolescents remain elevated but did not increase significantly in the past year, data from the annual Monitoring the Future survey show.
The 2020 survey included responses from 11,821 individuals in 112 schools across the United States from Feb. 11, 2020, to March 14, 2020, at which time data collection ended prematurely because of the COVID-19 pandemic.
A key positive finding in this year’s survey was the relatively stable levels of nicotine vaping from 2019 to 2020, following a trend of notably increased use annually since vaping was added to the survey in 2017.
During the years 2017-2019, the percentage of teens who reported vaping nicotine in the past 12 months increased from 7.5% to 16.5% among 8th graders, from 15.8% to 30.7% among 10th graders, and from 18.8% to 35.3% among 12th graders. However, in 2020, the percentages of teens who reported past-year nicotine vaping were relatively steady at 16.6%, 30.7%, and 34.5%, for 8th-, 10th-, and 12th-grade students, respectively. In addition, reports of daily or near-daily nicotine vaping (defined as 20 occasions in the past 30 days) decreased significantly, from 6.8% to 3.6% among 10th graders and from 11.6% to 5.3% among 12th graders.
“The rapid rise of teen nicotine vaping in recent years has been unprecedented and deeply concerning since we know that nicotine is highly addictive and can be delivered at high doses by vaping devices, which may also contain other toxic chemicals that may be harmful when inhaled,” said Nora D. Volkow, MD, director of the National Institute on Drug Abuse in a press release accompanying the release of the findings. “It is encouraging to see a leveling off of this trend though the rates still remain very high.”
Reports of past-year marijuana vaping remained similar to 2019 levels after a twofold increase in the past 2 years, according to the survey. In early 2020, 8.1%, 19.1%, and 22.1% of 8th, 10th, and 12th graders reported past-year use. However, daily marijuana vaping decreased by more than half from 2019, to 1.1% among 10th graders and 1.5% among 12th graders.
Past-year use of the JUUL devices specifically also declined among older teens, from 28.7% in 2019 to 20% in 2020 among 10th graders and from 28.4% in 2019 to 22.7% in 2020 among 12th graders.
Other trends this year included the increased past-year use of amphetamines, inhalants, and cough medicines among 8th graders, and relatively low reported use among 12th graders of LSD (3.9%), synthetic cannabinoids (2.4%), cocaine (2.9%), ecstasy (1.8%), methamphetamine (1.4%), and heroin (0.3%).
The findings were published in JAMA Pediatrics.
Early data show progress
“The MTF survey is the most referenced and reliable longitudinal study reporting current use of tobacco, drugs, and alcohol among young people,” said Mark S. Gold, MD, of Washington University, St. Louis, in an interview.
“The new data, collected before data collection stopped prematurely due to the COVID-19 pandemic, suggests that some progress is being made in slowing the increase in substance use among these, the most vulnerable,” he said.
“The best news was that nicotine vaping decreased significantly after its meteoric increase over the past few years,” Dr. Gold emphasized. “Past-year vaping of marijuana remained steady at alarming levels in 2020, with 8.1% of 8th graders, 19.1% of 10th graders, and 22.1% of 12th graders reporting past-year use, following a two-fold increase over the past 2 years.” The use of all forms of marijuana, including smoking and vaping, did not significantly change in any of the three grades for lifetime use, past 12-month use, past 30-day use, and daily use from 2019 to 2020.
“Teen alcohol use has not significantly changed over the past 5 years,” and cigarette smoking in the last 30 days did not significantly change from 2019 to 2020, said Dr. Gold. However, “as with adults, psychostimulant use is increasing. Past year nonmedical use of amphetamines among 8th graders increased, from 3.5% in 2017 to 5.3% in 2020.”
COVID-era limitations
“The data suggest that pre-COVID pandemic vaping, smoking cigarettes, marijuana, and alcohol use had stabilized,” Dr. Gold said. “However, it is very difficult to predict what the COVID era data will show as many young people are at home, on the streets, and unsupervised; while adult substance misuse, substance use disorders, and overdoses are increasing. Drug supplies and access have increased for alcohol, cannabis, vaping, and tobacco as have supply synthetics like methamphetamine and fentanyl.”
In addition, “access to evaluation, intervention, and treatment have been curtailed during the pandemic,” Dr. Gold said. “The loss of peer role models, daily routine, and teacher or other adult supervision and interventions may interact with increasing despair, social isolation, depression, and anxiety in ways that are unknown. “It will not be clear until the next survey if perceived dangerousness has changed in ways that can protect these 8th, 10th, and 12th graders and increase the numbers of never users or current nonusers.”
The Monitoring the Future survey is conducted each year by the University of Michigan’s Institute for Social Research, Ann Arbor, and supported by NIDA, part of the National Institutes of Health. Dr. Gold had no relevant financial conflicts to disclose.
Levels of nicotine and marijuana vaping among adolescents remain elevated but did not increase significantly in the past year, data from the annual Monitoring the Future survey show.
The 2020 survey included responses from 11,821 individuals in 112 schools across the United States from Feb. 11, 2020, to March 14, 2020, at which time data collection ended prematurely because of the COVID-19 pandemic.
A key positive finding in this year’s survey was the relatively stable levels of nicotine vaping from 2019 to 2020, following a trend of notably increased use annually since vaping was added to the survey in 2017.
During the years 2017-2019, the percentage of teens who reported vaping nicotine in the past 12 months increased from 7.5% to 16.5% among 8th graders, from 15.8% to 30.7% among 10th graders, and from 18.8% to 35.3% among 12th graders. However, in 2020, the percentages of teens who reported past-year nicotine vaping were relatively steady at 16.6%, 30.7%, and 34.5%, for 8th-, 10th-, and 12th-grade students, respectively. In addition, reports of daily or near-daily nicotine vaping (defined as 20 occasions in the past 30 days) decreased significantly, from 6.8% to 3.6% among 10th graders and from 11.6% to 5.3% among 12th graders.
“The rapid rise of teen nicotine vaping in recent years has been unprecedented and deeply concerning since we know that nicotine is highly addictive and can be delivered at high doses by vaping devices, which may also contain other toxic chemicals that may be harmful when inhaled,” said Nora D. Volkow, MD, director of the National Institute on Drug Abuse in a press release accompanying the release of the findings. “It is encouraging to see a leveling off of this trend though the rates still remain very high.”
Reports of past-year marijuana vaping remained similar to 2019 levels after a twofold increase in the past 2 years, according to the survey. In early 2020, 8.1%, 19.1%, and 22.1% of 8th, 10th, and 12th graders reported past-year use. However, daily marijuana vaping decreased by more than half from 2019, to 1.1% among 10th graders and 1.5% among 12th graders.
Past-year use of the JUUL devices specifically also declined among older teens, from 28.7% in 2019 to 20% in 2020 among 10th graders and from 28.4% in 2019 to 22.7% in 2020 among 12th graders.
Other trends this year included the increased past-year use of amphetamines, inhalants, and cough medicines among 8th graders, and relatively low reported use among 12th graders of LSD (3.9%), synthetic cannabinoids (2.4%), cocaine (2.9%), ecstasy (1.8%), methamphetamine (1.4%), and heroin (0.3%).
The findings were published in JAMA Pediatrics.
Early data show progress
“The MTF survey is the most referenced and reliable longitudinal study reporting current use of tobacco, drugs, and alcohol among young people,” said Mark S. Gold, MD, of Washington University, St. Louis, in an interview.
“The new data, collected before data collection stopped prematurely due to the COVID-19 pandemic, suggests that some progress is being made in slowing the increase in substance use among these, the most vulnerable,” he said.
“The best news was that nicotine vaping decreased significantly after its meteoric increase over the past few years,” Dr. Gold emphasized. “Past-year vaping of marijuana remained steady at alarming levels in 2020, with 8.1% of 8th graders, 19.1% of 10th graders, and 22.1% of 12th graders reporting past-year use, following a two-fold increase over the past 2 years.” The use of all forms of marijuana, including smoking and vaping, did not significantly change in any of the three grades for lifetime use, past 12-month use, past 30-day use, and daily use from 2019 to 2020.
“Teen alcohol use has not significantly changed over the past 5 years,” and cigarette smoking in the last 30 days did not significantly change from 2019 to 2020, said Dr. Gold. However, “as with adults, psychostimulant use is increasing. Past year nonmedical use of amphetamines among 8th graders increased, from 3.5% in 2017 to 5.3% in 2020.”
COVID-era limitations
“The data suggest that pre-COVID pandemic vaping, smoking cigarettes, marijuana, and alcohol use had stabilized,” Dr. Gold said. “However, it is very difficult to predict what the COVID era data will show as many young people are at home, on the streets, and unsupervised; while adult substance misuse, substance use disorders, and overdoses are increasing. Drug supplies and access have increased for alcohol, cannabis, vaping, and tobacco as have supply synthetics like methamphetamine and fentanyl.”
In addition, “access to evaluation, intervention, and treatment have been curtailed during the pandemic,” Dr. Gold said. “The loss of peer role models, daily routine, and teacher or other adult supervision and interventions may interact with increasing despair, social isolation, depression, and anxiety in ways that are unknown. “It will not be clear until the next survey if perceived dangerousness has changed in ways that can protect these 8th, 10th, and 12th graders and increase the numbers of never users or current nonusers.”
The Monitoring the Future survey is conducted each year by the University of Michigan’s Institute for Social Research, Ann Arbor, and supported by NIDA, part of the National Institutes of Health. Dr. Gold had no relevant financial conflicts to disclose.
Levels of nicotine and marijuana vaping among adolescents remain elevated but did not increase significantly in the past year, data from the annual Monitoring the Future survey show.
The 2020 survey included responses from 11,821 individuals in 112 schools across the United States from Feb. 11, 2020, to March 14, 2020, at which time data collection ended prematurely because of the COVID-19 pandemic.
A key positive finding in this year’s survey was the relatively stable levels of nicotine vaping from 2019 to 2020, following a trend of notably increased use annually since vaping was added to the survey in 2017.
During the years 2017-2019, the percentage of teens who reported vaping nicotine in the past 12 months increased from 7.5% to 16.5% among 8th graders, from 15.8% to 30.7% among 10th graders, and from 18.8% to 35.3% among 12th graders. However, in 2020, the percentages of teens who reported past-year nicotine vaping were relatively steady at 16.6%, 30.7%, and 34.5%, for 8th-, 10th-, and 12th-grade students, respectively. In addition, reports of daily or near-daily nicotine vaping (defined as 20 occasions in the past 30 days) decreased significantly, from 6.8% to 3.6% among 10th graders and from 11.6% to 5.3% among 12th graders.
“The rapid rise of teen nicotine vaping in recent years has been unprecedented and deeply concerning since we know that nicotine is highly addictive and can be delivered at high doses by vaping devices, which may also contain other toxic chemicals that may be harmful when inhaled,” said Nora D. Volkow, MD, director of the National Institute on Drug Abuse in a press release accompanying the release of the findings. “It is encouraging to see a leveling off of this trend though the rates still remain very high.”
Reports of past-year marijuana vaping remained similar to 2019 levels after a twofold increase in the past 2 years, according to the survey. In early 2020, 8.1%, 19.1%, and 22.1% of 8th, 10th, and 12th graders reported past-year use. However, daily marijuana vaping decreased by more than half from 2019, to 1.1% among 10th graders and 1.5% among 12th graders.
Past-year use of the JUUL devices specifically also declined among older teens, from 28.7% in 2019 to 20% in 2020 among 10th graders and from 28.4% in 2019 to 22.7% in 2020 among 12th graders.
Other trends this year included the increased past-year use of amphetamines, inhalants, and cough medicines among 8th graders, and relatively low reported use among 12th graders of LSD (3.9%), synthetic cannabinoids (2.4%), cocaine (2.9%), ecstasy (1.8%), methamphetamine (1.4%), and heroin (0.3%).
The findings were published in JAMA Pediatrics.
Early data show progress
“The MTF survey is the most referenced and reliable longitudinal study reporting current use of tobacco, drugs, and alcohol among young people,” said Mark S. Gold, MD, of Washington University, St. Louis, in an interview.
“The new data, collected before data collection stopped prematurely due to the COVID-19 pandemic, suggests that some progress is being made in slowing the increase in substance use among these, the most vulnerable,” he said.
“The best news was that nicotine vaping decreased significantly after its meteoric increase over the past few years,” Dr. Gold emphasized. “Past-year vaping of marijuana remained steady at alarming levels in 2020, with 8.1% of 8th graders, 19.1% of 10th graders, and 22.1% of 12th graders reporting past-year use, following a two-fold increase over the past 2 years.” The use of all forms of marijuana, including smoking and vaping, did not significantly change in any of the three grades for lifetime use, past 12-month use, past 30-day use, and daily use from 2019 to 2020.
“Teen alcohol use has not significantly changed over the past 5 years,” and cigarette smoking in the last 30 days did not significantly change from 2019 to 2020, said Dr. Gold. However, “as with adults, psychostimulant use is increasing. Past year nonmedical use of amphetamines among 8th graders increased, from 3.5% in 2017 to 5.3% in 2020.”
COVID-era limitations
“The data suggest that pre-COVID pandemic vaping, smoking cigarettes, marijuana, and alcohol use had stabilized,” Dr. Gold said. “However, it is very difficult to predict what the COVID era data will show as many young people are at home, on the streets, and unsupervised; while adult substance misuse, substance use disorders, and overdoses are increasing. Drug supplies and access have increased for alcohol, cannabis, vaping, and tobacco as have supply synthetics like methamphetamine and fentanyl.”
In addition, “access to evaluation, intervention, and treatment have been curtailed during the pandemic,” Dr. Gold said. “The loss of peer role models, daily routine, and teacher or other adult supervision and interventions may interact with increasing despair, social isolation, depression, and anxiety in ways that are unknown. “It will not be clear until the next survey if perceived dangerousness has changed in ways that can protect these 8th, 10th, and 12th graders and increase the numbers of never users or current nonusers.”
The Monitoring the Future survey is conducted each year by the University of Michigan’s Institute for Social Research, Ann Arbor, and supported by NIDA, part of the National Institutes of Health. Dr. Gold had no relevant financial conflicts to disclose.
E-cigarette use tied to increased COPD, asthma risk
Results from a large national prospective cohort study of adults demonstrated that the use of electronic cigarettes is associated with an increased risk of asthma, chronic obstructive pulmonary disease (COPD), emphysema, and chronic bronchitis – independent of cigarette smoking and other combustible tobacco product use.
“Our longitudinal results are consistent with the findings of prior population studies,” researchers led by Wubin Xie, DrPH, MPH, wrote in a study published online in JAMA Network Open. “With a more refined study design assessing multiple respiratory conditions and extensive sensitivity checks to mitigate bias from reverse causation and residual confounding by cigarette smoking and other tobacco product use, our results strengthen the evidence of the potential role of e-cigarette use in pulmonary disease pathogenesis. The findings may be used to inform counseling of patients on the potential risks of e-cigarette use.”
Dr. Xie of Boston University, and colleagues used data from the Population Assessment of Tobacco and Health (PATH) study waves 1-4 to examine the association of e-cigarette use with incident respiratory conditions, including COPD, emphysema, chronic bronchitis, and asthma. An earlier analysis of PATH data found an association between e-cigarette use with a composite respiratory disease outcome, but it did not consider the timing of respiratory events over follow-up and was underpowered to evaluate specific respiratory conditions.
The current analysis included data from 21,618 U.S. adults who were surveyed in four waves of PATH between 2013 and 2018. Of these, 49% were men, 65% were non-Hispanic White, 12% were non-Hispanic Black, 16% were Hispanic, and the remainder were non-Hispanic other. Their mean pack-years was 6.7 at baseline, 26% had self-reported hypertension, and their mean body mass index was 27.8 kg/m2. The analysis was limited to data from the wave 1 cohort of adults and the prospective follow-up at waves 2-4 from public use files. It excluded adults who reported a history of a respiratory condition such as COPD, emphysema, chronic bronchitis, or asthma at wave 1 (baseline).
Two-thirds of respondents (66%) were never e-cigarette users, 12% were former e-cigarette users, and 5% were current e-cigarette users. After the researchers adjusted for cigarette and other combustible tobacco product use, demographic characteristics, and chronic health conditions, they observed an increased risk of respiratory disease among former e-cigarette users (incidence rate ratio, 1.28) and current e-cigarette users (IRR, 1.31). Among respondents with good self-reported health, the IRR for former e-cigarette users was 1.21 and the IRR for current e-cigarette users was 1.43. As for specific respiratory diseases among current e-cigarette users, the IRR was 1.33 for chronic bronchitis, 1.69 for emphysema, 1.57 for COPD, and 1.31 for asthma.
“Our findings on clinical outcome were consistent with studies assessing in vivo biomarkers of e-cigarette exposure in animal subjects, human participants, and population studies,” the authors wrote. “Studies have documented that exclusive e-cigarette use may be associated with higher exposure to harmful and potentially harmful constituents, compared with tobacco nonuse. The potential mechanisms of the association of e-cigarette exposure with pulmonary diseases include pulmonary inflammation, increased oxidative stress, and inhibited immune response. Animal studies have generated substantial evidence on e-cigarette exposure and emphysematous lung destruction, loss of pulmonary capillaries, reduced small airway function, and airway hyperresponsiveness, suggesting the plausibility of e-cigarettes causing chronic lung diseases.”
They acknowledged certain limitations of the study, including its reliance on self-reported measures of e-cigarette and other tobacco product use and its reliance on self-reported diagnoses of respiratory diseases.
The study was supported by grants from the National Heart, Lung, and Blood Institute; the Food and Drug Administration Center for Tobacco Products; and the American Lung Association Public Policy Research Award. Dr. Xie reported having no financial disclosures. His coauthors reported having received research grants and personal fees from a variety of sources.
SOURCE: Xie W et al. JAMA Netw Open. 2020 Nov 12. doi: 10.1001/jamanetworkopen.2020.20816
Results from a large national prospective cohort study of adults demonstrated that the use of electronic cigarettes is associated with an increased risk of asthma, chronic obstructive pulmonary disease (COPD), emphysema, and chronic bronchitis – independent of cigarette smoking and other combustible tobacco product use.
“Our longitudinal results are consistent with the findings of prior population studies,” researchers led by Wubin Xie, DrPH, MPH, wrote in a study published online in JAMA Network Open. “With a more refined study design assessing multiple respiratory conditions and extensive sensitivity checks to mitigate bias from reverse causation and residual confounding by cigarette smoking and other tobacco product use, our results strengthen the evidence of the potential role of e-cigarette use in pulmonary disease pathogenesis. The findings may be used to inform counseling of patients on the potential risks of e-cigarette use.”
Dr. Xie of Boston University, and colleagues used data from the Population Assessment of Tobacco and Health (PATH) study waves 1-4 to examine the association of e-cigarette use with incident respiratory conditions, including COPD, emphysema, chronic bronchitis, and asthma. An earlier analysis of PATH data found an association between e-cigarette use with a composite respiratory disease outcome, but it did not consider the timing of respiratory events over follow-up and was underpowered to evaluate specific respiratory conditions.
The current analysis included data from 21,618 U.S. adults who were surveyed in four waves of PATH between 2013 and 2018. Of these, 49% were men, 65% were non-Hispanic White, 12% were non-Hispanic Black, 16% were Hispanic, and the remainder were non-Hispanic other. Their mean pack-years was 6.7 at baseline, 26% had self-reported hypertension, and their mean body mass index was 27.8 kg/m2. The analysis was limited to data from the wave 1 cohort of adults and the prospective follow-up at waves 2-4 from public use files. It excluded adults who reported a history of a respiratory condition such as COPD, emphysema, chronic bronchitis, or asthma at wave 1 (baseline).
Two-thirds of respondents (66%) were never e-cigarette users, 12% were former e-cigarette users, and 5% were current e-cigarette users. After the researchers adjusted for cigarette and other combustible tobacco product use, demographic characteristics, and chronic health conditions, they observed an increased risk of respiratory disease among former e-cigarette users (incidence rate ratio, 1.28) and current e-cigarette users (IRR, 1.31). Among respondents with good self-reported health, the IRR for former e-cigarette users was 1.21 and the IRR for current e-cigarette users was 1.43. As for specific respiratory diseases among current e-cigarette users, the IRR was 1.33 for chronic bronchitis, 1.69 for emphysema, 1.57 for COPD, and 1.31 for asthma.
“Our findings on clinical outcome were consistent with studies assessing in vivo biomarkers of e-cigarette exposure in animal subjects, human participants, and population studies,” the authors wrote. “Studies have documented that exclusive e-cigarette use may be associated with higher exposure to harmful and potentially harmful constituents, compared with tobacco nonuse. The potential mechanisms of the association of e-cigarette exposure with pulmonary diseases include pulmonary inflammation, increased oxidative stress, and inhibited immune response. Animal studies have generated substantial evidence on e-cigarette exposure and emphysematous lung destruction, loss of pulmonary capillaries, reduced small airway function, and airway hyperresponsiveness, suggesting the plausibility of e-cigarettes causing chronic lung diseases.”
They acknowledged certain limitations of the study, including its reliance on self-reported measures of e-cigarette and other tobacco product use and its reliance on self-reported diagnoses of respiratory diseases.
The study was supported by grants from the National Heart, Lung, and Blood Institute; the Food and Drug Administration Center for Tobacco Products; and the American Lung Association Public Policy Research Award. Dr. Xie reported having no financial disclosures. His coauthors reported having received research grants and personal fees from a variety of sources.
SOURCE: Xie W et al. JAMA Netw Open. 2020 Nov 12. doi: 10.1001/jamanetworkopen.2020.20816
Results from a large national prospective cohort study of adults demonstrated that the use of electronic cigarettes is associated with an increased risk of asthma, chronic obstructive pulmonary disease (COPD), emphysema, and chronic bronchitis – independent of cigarette smoking and other combustible tobacco product use.
“Our longitudinal results are consistent with the findings of prior population studies,” researchers led by Wubin Xie, DrPH, MPH, wrote in a study published online in JAMA Network Open. “With a more refined study design assessing multiple respiratory conditions and extensive sensitivity checks to mitigate bias from reverse causation and residual confounding by cigarette smoking and other tobacco product use, our results strengthen the evidence of the potential role of e-cigarette use in pulmonary disease pathogenesis. The findings may be used to inform counseling of patients on the potential risks of e-cigarette use.”
Dr. Xie of Boston University, and colleagues used data from the Population Assessment of Tobacco and Health (PATH) study waves 1-4 to examine the association of e-cigarette use with incident respiratory conditions, including COPD, emphysema, chronic bronchitis, and asthma. An earlier analysis of PATH data found an association between e-cigarette use with a composite respiratory disease outcome, but it did not consider the timing of respiratory events over follow-up and was underpowered to evaluate specific respiratory conditions.
The current analysis included data from 21,618 U.S. adults who were surveyed in four waves of PATH between 2013 and 2018. Of these, 49% were men, 65% were non-Hispanic White, 12% were non-Hispanic Black, 16% were Hispanic, and the remainder were non-Hispanic other. Their mean pack-years was 6.7 at baseline, 26% had self-reported hypertension, and their mean body mass index was 27.8 kg/m2. The analysis was limited to data from the wave 1 cohort of adults and the prospective follow-up at waves 2-4 from public use files. It excluded adults who reported a history of a respiratory condition such as COPD, emphysema, chronic bronchitis, or asthma at wave 1 (baseline).
Two-thirds of respondents (66%) were never e-cigarette users, 12% were former e-cigarette users, and 5% were current e-cigarette users. After the researchers adjusted for cigarette and other combustible tobacco product use, demographic characteristics, and chronic health conditions, they observed an increased risk of respiratory disease among former e-cigarette users (incidence rate ratio, 1.28) and current e-cigarette users (IRR, 1.31). Among respondents with good self-reported health, the IRR for former e-cigarette users was 1.21 and the IRR for current e-cigarette users was 1.43. As for specific respiratory diseases among current e-cigarette users, the IRR was 1.33 for chronic bronchitis, 1.69 for emphysema, 1.57 for COPD, and 1.31 for asthma.
“Our findings on clinical outcome were consistent with studies assessing in vivo biomarkers of e-cigarette exposure in animal subjects, human participants, and population studies,” the authors wrote. “Studies have documented that exclusive e-cigarette use may be associated with higher exposure to harmful and potentially harmful constituents, compared with tobacco nonuse. The potential mechanisms of the association of e-cigarette exposure with pulmonary diseases include pulmonary inflammation, increased oxidative stress, and inhibited immune response. Animal studies have generated substantial evidence on e-cigarette exposure and emphysematous lung destruction, loss of pulmonary capillaries, reduced small airway function, and airway hyperresponsiveness, suggesting the plausibility of e-cigarettes causing chronic lung diseases.”
They acknowledged certain limitations of the study, including its reliance on self-reported measures of e-cigarette and other tobacco product use and its reliance on self-reported diagnoses of respiratory diseases.
The study was supported by grants from the National Heart, Lung, and Blood Institute; the Food and Drug Administration Center for Tobacco Products; and the American Lung Association Public Policy Research Award. Dr. Xie reported having no financial disclosures. His coauthors reported having received research grants and personal fees from a variety of sources.
SOURCE: Xie W et al. JAMA Netw Open. 2020 Nov 12. doi: 10.1001/jamanetworkopen.2020.20816
FROM JAMA NETWORK OPEN