Pulmonology

Acute flares of idiopathic pulmonary fibrosis have a mortality rate as high as 90% or more, depending on their severity. But an experimental regimen that includes autoantibody reduction was found to improve survival significantly, as well as oxygen levels and walk distances, according to a small preliminary study published in PLOS ONE.

“It’s a preliminary study, but it’s very exciting,” Amit Gaggar, MD, PhD, an endowed professor of medicine at the University of Alabama at Birmingham (UAB), said in an interview. “We don’t really have a treatment for acute exacerbations of pulmonary fibrosis, and the mortality is extremely high, so it’s really critical that we start thinking outside the box a little bit for therapeutics.” Dr. Gaggar isn’t affiliated with the study.

Study leader Steven R. Duncan, MD, also of UAB, acknowledged that the experimental therapy has its detractors. “There’s been a tremendous bias against the role of immunologic therapy in idiopathic fibrosis, although it seems to be lessening,” he said.

The preliminary study treated 24 patients who had acute exacerbations of idiopathic pulmonary fibrosis (AE-IPF) with a 19-day regimen called triple-modality autoantibody reduction. The three contributing modalities are therapeutic plasma exchange (TPE), rituximab, and intravenous immunoglobulin treatments. The standard treatment for AE-IPF consists of antibiotics and corticosteroids.

Dr. Duncan led the only other study of autoantibody reduction for AE-IPF, published in PLOS ONE in 2015. The latest preliminary study is a precursor to a National Heart, Lung, and Blood Institute–funded phase 2 randomized clinical trial, called STRIVE-IPF, currently enrolling AE-IPF patients at six sites.

In the preliminary study, 10 patients survived at least a year, an overall survival rate of 42%. Overall survival rates at 1, 3, and 6 months were 67%, 63%, and 46%. The study couldn’t identify characteristics of survivors versus nonsurvivors, although the latter had a trend toward greater initial oxygen requirements. Among the 10 patients who needed less than 25 L/min supplemental O2, the survival rate was 57%. In patients who needed more than 25 L/min, the survival rate was 20% (P = .07). Only 1 of 5 patients who needed greater than 40 L/min survived a year (P = .36).

After the 19-day regimen, 15 patients, or 63%, had significant drops in supplemental O2 requirements, from an average of 15 L/min to 3 L/min (P = .0007). Thirteen (87%) of the patients who were taking an antifibrotic medication (either pirfenidone or nintedanib) at baseline needed less O2 and/or had increased walking distances, compared with five who weren’t prescribed either of the agents (P = .15), although 1-year survival didn’t vary significantly with antifibrotic use.

The mechanism of antibody reduction is to filter out B-cells, infiltrates of which are typically found in lungs of AE-IPF patients, Dr. Duncan said. The regimen involves nine TPEs over 15 days, two IV rituximab 1-gm treatments over that course, and IV Ig 0.5-gm/kg treatments daily on days 16 through 19.

“Plasma exchange rapidly gets rid of the antibodies,” Dr. Duncan said in an interview. “It’s the basis for a number of autoantibody-mediated diseases, such as myasthenia gravis.”

While the TPE removes the B-cells, they have a proclivity to re-emerge, hence the rituximab treatment, he said. IV Ig further inhibits B-cell activity. “The IV Ig probably works in large part by feedback inhibition of the B-cells that have survived the rituximab,” Dr. Duncan said.

He added that with the TPE and rituximab patients had “sometimes amazing response” but then would relapse. “Since we added IV Ig, we see far fewer relapses,” he said. “And interestingly, if they do relapse, we can salvage them by giving them this treatment again.”

The preliminary study doesn’t make clear what patients would benefit most from the triple-modality therapy, but it did provide some clues. “We found that patients who have higher levels of antibodies against epithelial cells tend to do the best, and patients who had less severe disease – that is, less disturbance of gas exchange requiring less O2 – tend to do better,” Dr. Duncan said. The STRIVE trial should serve to identify specific biomarkers, he said.

Dr. Gaggar, the UAB professor who’s not affiliated with the study, concurred that it’s “too early to tell” which patients would benefit. “Certainly, these patients that undergo exacerbations would be of high interest,” he said, “but the potential is there that the other chronic lung diseases that have exacerbations may also benefit from this kind of therapy.”

He noted that the preliminary study focused on one type of autoantibody generating from epithelial cells. “In many of these studies where we limit ourselves to a single autoantibody population, we might be at the tip of iceberg,” Dr. Gaggar said. “There might be autoantibodies generated from other cells in the lung or the body that might be also pathogenic. This is really powerful because this is a subgroup of autoantibodies, but they still had that kind of impact in this small study.”

The STRIVE study is scheduled for completion in September 2022.

Dr. Duncan disclosed relationships with Novartis and Tyr Pharma outside the study subject. Dr. Gaggar has no relevant disclosures.

A version of this article first appeared on Medscape.com.

Acute flares of idiopathic pulmonary fibrosis have a mortality rate as high as 90% or more, depending on their severity. But an experimental regimen that includes autoantibody reduction was found to improve survival significantly, as well as oxygen levels and walk distances, according to a small preliminary study published in PLOS ONE.

“It’s a preliminary study, but it’s very exciting,” Amit Gaggar, MD, PhD, an endowed professor of medicine at the University of Alabama at Birmingham (UAB), said in an interview. “We don’t really have a treatment for acute exacerbations of pulmonary fibrosis, and the mortality is extremely high, so it’s really critical that we start thinking outside the box a little bit for therapeutics.” Dr. Gaggar isn’t affiliated with the study.

Study leader Steven R. Duncan, MD, also of UAB, acknowledged that the experimental therapy has its detractors. “There’s been a tremendous bias against the role of immunologic therapy in idiopathic fibrosis, although it seems to be lessening,” he said.

The preliminary study treated 24 patients who had acute exacerbations of idiopathic pulmonary fibrosis (AE-IPF) with a 19-day regimen called triple-modality autoantibody reduction. The three contributing modalities are therapeutic plasma exchange (TPE), rituximab, and intravenous immunoglobulin treatments. The standard treatment for AE-IPF consists of antibiotics and corticosteroids.

Dr. Duncan led the only other study of autoantibody reduction for AE-IPF, published in PLOS ONE in 2015. The latest preliminary study is a precursor to a National Heart, Lung, and Blood Institute–funded phase 2 randomized clinical trial, called STRIVE-IPF, currently enrolling AE-IPF patients at six sites.

In the preliminary study, 10 patients survived at least a year, an overall survival rate of 42%. Overall survival rates at 1, 3, and 6 months were 67%, 63%, and 46%. The study couldn’t identify characteristics of survivors versus nonsurvivors, although the latter had a trend toward greater initial oxygen requirements. Among the 10 patients who needed less than 25 L/min supplemental O2, the survival rate was 57%. In patients who needed more than 25 L/min, the survival rate was 20% (P = .07). Only 1 of 5 patients who needed greater than 40 L/min survived a year (P = .36).

After the 19-day regimen, 15 patients, or 63%, had significant drops in supplemental O2 requirements, from an average of 15 L/min to 3 L/min (P = .0007). Thirteen (87%) of the patients who were taking an antifibrotic medication (either pirfenidone or nintedanib) at baseline needed less O2 and/or had increased walking distances, compared with five who weren’t prescribed either of the agents (P = .15), although 1-year survival didn’t vary significantly with antifibrotic use.

The mechanism of antibody reduction is to filter out B-cells, infiltrates of which are typically found in lungs of AE-IPF patients, Dr. Duncan said. The regimen involves nine TPEs over 15 days, two IV rituximab 1-gm treatments over that course, and IV Ig 0.5-gm/kg treatments daily on days 16 through 19.

“Plasma exchange rapidly gets rid of the antibodies,” Dr. Duncan said in an interview. “It’s the basis for a number of autoantibody-mediated diseases, such as myasthenia gravis.”

While the TPE removes the B-cells, they have a proclivity to re-emerge, hence the rituximab treatment, he said. IV Ig further inhibits B-cell activity. “The IV Ig probably works in large part by feedback inhibition of the B-cells that have survived the rituximab,” Dr. Duncan said.

He added that with the TPE and rituximab patients had “sometimes amazing response” but then would relapse. “Since we added IV Ig, we see far fewer relapses,” he said. “And interestingly, if they do relapse, we can salvage them by giving them this treatment again.”

The preliminary study doesn’t make clear what patients would benefit most from the triple-modality therapy, but it did provide some clues. “We found that patients who have higher levels of antibodies against epithelial cells tend to do the best, and patients who had less severe disease – that is, less disturbance of gas exchange requiring less O2 – tend to do better,” Dr. Duncan said. The STRIVE trial should serve to identify specific biomarkers, he said.

Dr. Gaggar, the UAB professor who’s not affiliated with the study, concurred that it’s “too early to tell” which patients would benefit. “Certainly, these patients that undergo exacerbations would be of high interest,” he said, “but the potential is there that the other chronic lung diseases that have exacerbations may also benefit from this kind of therapy.”

He noted that the preliminary study focused on one type of autoantibody generating from epithelial cells. “In many of these studies where we limit ourselves to a single autoantibody population, we might be at the tip of iceberg,” Dr. Gaggar said. “There might be autoantibodies generated from other cells in the lung or the body that might be also pathogenic. This is really powerful because this is a subgroup of autoantibodies, but they still had that kind of impact in this small study.”

The STRIVE study is scheduled for completion in September 2022.

Dr. Duncan disclosed relationships with Novartis and Tyr Pharma outside the study subject. Dr. Gaggar has no relevant disclosures.

A version of this article first appeared on Medscape.com.

Acute flares of idiopathic pulmonary fibrosis have a mortality rate as high as 90% or more, depending on their severity. But an experimental regimen that includes autoantibody reduction was found to improve survival significantly, as well as oxygen levels and walk distances, according to a small preliminary study published in PLOS ONE.

“It’s a preliminary study, but it’s very exciting,” Amit Gaggar, MD, PhD, an endowed professor of medicine at the University of Alabama at Birmingham (UAB), said in an interview. “We don’t really have a treatment for acute exacerbations of pulmonary fibrosis, and the mortality is extremely high, so it’s really critical that we start thinking outside the box a little bit for therapeutics.” Dr. Gaggar isn’t affiliated with the study.

Study leader Steven R. Duncan, MD, also of UAB, acknowledged that the experimental therapy has its detractors. “There’s been a tremendous bias against the role of immunologic therapy in idiopathic fibrosis, although it seems to be lessening,” he said.

The preliminary study treated 24 patients who had acute exacerbations of idiopathic pulmonary fibrosis (AE-IPF) with a 19-day regimen called triple-modality autoantibody reduction. The three contributing modalities are therapeutic plasma exchange (TPE), rituximab, and intravenous immunoglobulin treatments. The standard treatment for AE-IPF consists of antibiotics and corticosteroids.

Dr. Duncan led the only other study of autoantibody reduction for AE-IPF, published in PLOS ONE in 2015. The latest preliminary study is a precursor to a National Heart, Lung, and Blood Institute–funded phase 2 randomized clinical trial, called STRIVE-IPF, currently enrolling AE-IPF patients at six sites.

In the preliminary study, 10 patients survived at least a year, an overall survival rate of 42%. Overall survival rates at 1, 3, and 6 months were 67%, 63%, and 46%. The study couldn’t identify characteristics of survivors versus nonsurvivors, although the latter had a trend toward greater initial oxygen requirements. Among the 10 patients who needed less than 25 L/min supplemental O2, the survival rate was 57%. In patients who needed more than 25 L/min, the survival rate was 20% (P = .07). Only 1 of 5 patients who needed greater than 40 L/min survived a year (P = .36).

After the 19-day regimen, 15 patients, or 63%, had significant drops in supplemental O2 requirements, from an average of 15 L/min to 3 L/min (P = .0007). Thirteen (87%) of the patients who were taking an antifibrotic medication (either pirfenidone or nintedanib) at baseline needed less O2 and/or had increased walking distances, compared with five who weren’t prescribed either of the agents (P = .15), although 1-year survival didn’t vary significantly with antifibrotic use.

The mechanism of antibody reduction is to filter out B-cells, infiltrates of which are typically found in lungs of AE-IPF patients, Dr. Duncan said. The regimen involves nine TPEs over 15 days, two IV rituximab 1-gm treatments over that course, and IV Ig 0.5-gm/kg treatments daily on days 16 through 19.

“Plasma exchange rapidly gets rid of the antibodies,” Dr. Duncan said in an interview. “It’s the basis for a number of autoantibody-mediated diseases, such as myasthenia gravis.”

While the TPE removes the B-cells, they have a proclivity to re-emerge, hence the rituximab treatment, he said. IV Ig further inhibits B-cell activity. “The IV Ig probably works in large part by feedback inhibition of the B-cells that have survived the rituximab,” Dr. Duncan said.

He added that with the TPE and rituximab patients had “sometimes amazing response” but then would relapse. “Since we added IV Ig, we see far fewer relapses,” he said. “And interestingly, if they do relapse, we can salvage them by giving them this treatment again.”

The preliminary study doesn’t make clear what patients would benefit most from the triple-modality therapy, but it did provide some clues. “We found that patients who have higher levels of antibodies against epithelial cells tend to do the best, and patients who had less severe disease – that is, less disturbance of gas exchange requiring less O2 – tend to do better,” Dr. Duncan said. The STRIVE trial should serve to identify specific biomarkers, he said.

Dr. Gaggar, the UAB professor who’s not affiliated with the study, concurred that it’s “too early to tell” which patients would benefit. “Certainly, these patients that undergo exacerbations would be of high interest,” he said, “but the potential is there that the other chronic lung diseases that have exacerbations may also benefit from this kind of therapy.”

He noted that the preliminary study focused on one type of autoantibody generating from epithelial cells. “In many of these studies where we limit ourselves to a single autoantibody population, we might be at the tip of iceberg,” Dr. Gaggar said. “There might be autoantibodies generated from other cells in the lung or the body that might be also pathogenic. This is really powerful because this is a subgroup of autoantibodies, but they still had that kind of impact in this small study.”

The STRIVE study is scheduled for completion in September 2022.

Dr. Duncan disclosed relationships with Novartis and Tyr Pharma outside the study subject. Dr. Gaggar has no relevant disclosures.

A version of this article first appeared on Medscape.com.

Chest pain is one of the most common concerns in patients presenting to the emergency department in the United States, accounting for approximately 7.6 million visits annually.¹ Given the high mortality rate associated with acute coronary syndromes, prompt evaluation of chest pain is essential.² Even in mild cases, recognition of newly onset or worsening coronary artery disease (CAD) is crucial to ensure that patients receive optimal medication therapy.

In symptomatic patients with risk factors for CAD, such as advanced age, hypertension, hyperlipidemia, obesity, and diabetes mellitus, myocardial perfusion imaging (MPI) is frequently used as a modality to assess the presence, location, and severity of ischemic or infarcted myocardium.² MPI requires administration of a radiopharmaceutical before and after the patient undergoes a form of stress.² This radiopharmaceutical is then detected in the myocardium with a nuclear camera, and images are obtained of the heart to assess myocardial blood flow.²

MPI can be performed using exercise-induced stress via a treadmill, or medication-induced stress (Table 1). In both strategies, healthy coronary arteries dilate to provide the myocardium with more blood flow to meet the increasing myocardial oxygen demand during this period of stress. While healthy vessels are able to dilate appropriately, coronary arteries with flow-limiting stenoses are unable to dilate to the same extent in response to stress.² Because radioactive isotope uptake by the myocardium is directly related to arterial blood flow, MPI is able to demonstrate a mismatch in coronary blood flow between healthy and diseased coronary arteries indicated by differences in radioisotope uptake.² The presence of such a mismatch, in conjunction with clinical history, potentially suggests the presence of CAD.

Because nicotine and nicotine replacement therapy (NRT) may have substantial effects on coronary circulation, a current area of controversy is whether these should be stopped prior to the use of a stress-inducing medication during MPI. To date, no formal drug interaction studies have been conducted between nicotine and regadenoson.⁵ Similarly, the ADVANCE MPI 2 Trial, which led to the US Food and Drug Administration approval of regadenoson, did not specify restrictions on the use of nicotine prior to stress testing in the protocol.⁶ However, as this trial was multicenter, investigators admit that individual study sites could have had their own restrictions on the use of nicotine prior to stress testing with regadenoson, but this information was not collected.⁶ The current review focuses on how the simultaneous use of nicotine or NRT during MPI with pharmacologic agents, such as regadenoson, may affect the accuracy of imaging results and the clinical impact of this interaction.

Nicotine Coronary Artery Effect

It is well documented that long-term cigarette smoking is a major risk factor for CAD.⁷ Compared with nonsmokers, cigarette smokers experience 2 times greater risk of morbidity and mortality from ischemic heart disease.⁷ There are several mechanisms by which nicotine induces damage to the myocardium (Figure). Nicotine has direct effects on both the sympathetic nervous system (SNS) and myocardial endothelium.⁸ Together, these factors result in reduced coronary blood flow, leading to less oxygen supply to meet an increased oxygen demand, resulting in myocardial ischemia.

Nicotine’s effect on coronary vasomotor tone occurs primarily through noradrenergic stimulation of α and β receptors associated with coronary vasoconstriction or vasodilation, respectively.^9,10 These competing influences on coronary blood flow appear to manifest differently based on whether patients are at rest or in a stressed state. A study by Czerin and colleagues demonstrated that in healthy patients with relatively short smoking histories and in a healthy nonsmoker control group, coronary blood flow increased by 25% and 40%, respectively, with nicotine use at rest.⁹ However, when these patients were stressed with dipyramidole and while smoking during the examination, myocardial blood flow was reduced by 11% in the study group and 14% in the control group.⁹ This is likely because the patients studied had relatively healthy coronary arteries that were able to maximally dilate when stressed. In this scenario, nicotine’s dilatory effects are offset by nicotine’s α-receptor–mediated vasoconstriction effects.⁹ Of note, patients in the study group experienced a somewhat diminished increase in coronary blood flow at rest with nicotine use, suggesting that even a short smoking history may damage the myocardial endothelium, rendering it less responsive to nicotine’s vasodilatory effects.⁹

Nicotine Replacement Therapy and Stress Testing

Given the association between cigarette smoking and CAD, medical practitioners strongly encourage patients to quit smoking to reduce their risk of adverse cardiovascular outcomes. Various smoking cessation treatments are available for patients. Common, readily accessible forms of therapy include nicotine replacement products (Table 2).

Early studies of NRT in patients with underlying CVD found an increased risk of cardiovascular events, such as myocardial infarction, presumably due to the nicotine content of these products.^13,14 However, the concentration of nicotine in NRT is substantially lower than that found in cigarettes and in some formulations, such as transdermal patches, nicotine is delivered over a prolonged period of time.¹⁵ For this reason, NRT is thought to be safe in patients with underlying CVD and stable ischemic heart disease. A recent systematic review and meta-analysis found that while NRT may be associated with tachycardia, it did not increase the risk of more serious cardiovascular adverse effects (AEs).^16,17

Given the lower nicotine concentration in NRT products, the associated hemodynamic effect of nicotine also is thought to be less pronounced. In a study conducted by Tzivoni and colleagues in patients with CAD using transdermal nicotine patches, no differences in blood pressure, heart rate, ischemia, or arrhythmias were found from baseline to 2 weeks.¹⁸ These findings were further confirmed in a small study by Lucini and colleagues, which found that nicotine patches produced slight hemodynamic effects, but to a lesser extent than cigarette smoking.¹⁹ For the NRT gum formulation, while a small study found that 4 mg produced coronary vasoconstriction in patients with underlying CAD, a study by Nitenberg and Antony demonstrated that healthy and diseased coronary arteries did not significantly constrict while patients were using nicotine gum both before and after a cold pressor test, suggesting a lesser degree of coronary vasoconstriction than nicotine from cigarette smoking.^20,21 Similar findings have been described with the nicotine intranasal spray in a study by Keeley and colleagues, which showed no additional AEs on myocardial demand or vasoconstriction when an intranasal nicotine spray was added to cigarette smoking.²² Importantly, a review of the transdermal and gum formulations found that these less pronounced hemodynamic effects were observed across different doses of NRT; however, further studies are needed to clarify the relationship between NRT dose and cardiovascular effects.²³

Overall, NRT does not seem to activate the SNS to the same degree as nicotine obtained via cigarette smoking and likely does not increase the myocardial oxygen demand as much. Additionally, by containing a lower concentration of nicotine, NRT may not impair the myocardium’s ability to supply oxygen to coronary arteries to the same extent as nicotine from cigarette smoking. Therefore, the effects of NRT on MPI using a stress-inducing medication may not be as pronounced. However, due to study limitations, results should be interpreted cautiously.^18-23

Conclusions

Because of the close relationship between cigarette smoking and CAD, many patients with underlying CVD are either current smokers or may be using NRT for smoking cessation. Therefore, the question of whether to refrain from nicotine use prior to MPI is clinically relevant. Currently, there is a lack of high-quality studies demonstrating the effects of nicotine and NRT on coronary perfusion. Because of this, the impact of nicotine and NRT use on the accuracy of MPI using stress-inducing medications remains uncertain. Nevertheless, given that nicotine and NRT may largely affect the accuracy of imaging results, several institutions have adopted protocols that prohibit patients from using these drugs on the day of nuclear stress testing.

There are currently no data specifying the number of hours to hold nicotine products prior to cardiac stress testing. It is generally recommended that other medications that affect coronary blood flow be held for 5 half-lives before conducting MPI.⁴ Following the same guidance for nicotine and NRT may present a reasonable approach to ensure accurate imaging results. Based on the discussed literature, patients should be instructed to refrain from cigarette smoking for at least 5 to 10 hours prior to MPI, given nicotine’s half-life of about 1 to 2 hours.²⁴

The data for NRT are less clear. While use of NRT may not be an absolute contraindication to conducting MPI, it is important to consider that this may affect the accuracy of results. Given this uncertainty, it is likely ideal to hold NRT prior to MPI, based on the specific formulation of NRT and that product's half-life. Further robust studies are needed to analyze the impact of nicotine and NRT on the accuracy of nuclear stress testing using a medication.

Chest pain is one of the most common concerns in patients presenting to the emergency department in the United States, accounting for approximately 7.6 million visits annually.¹ Given the high mortality rate associated with acute coronary syndromes, prompt evaluation of chest pain is essential.² Even in mild cases, recognition of newly onset or worsening coronary artery disease (CAD) is crucial to ensure that patients receive optimal medication therapy.

In symptomatic patients with risk factors for CAD, such as advanced age, hypertension, hyperlipidemia, obesity, and diabetes mellitus, myocardial perfusion imaging (MPI) is frequently used as a modality to assess the presence, location, and severity of ischemic or infarcted myocardium.² MPI requires administration of a radiopharmaceutical before and after the patient undergoes a form of stress.² This radiopharmaceutical is then detected in the myocardium with a nuclear camera, and images are obtained of the heart to assess myocardial blood flow.²

MPI can be performed using exercise-induced stress via a treadmill, or medication-induced stress (Table 1). In both strategies, healthy coronary arteries dilate to provide the myocardium with more blood flow to meet the increasing myocardial oxygen demand during this period of stress. While healthy vessels are able to dilate appropriately, coronary arteries with flow-limiting stenoses are unable to dilate to the same extent in response to stress.² Because radioactive isotope uptake by the myocardium is directly related to arterial blood flow, MPI is able to demonstrate a mismatch in coronary blood flow between healthy and diseased coronary arteries indicated by differences in radioisotope uptake.² The presence of such a mismatch, in conjunction with clinical history, potentially suggests the presence of CAD.

Because nicotine and nicotine replacement therapy (NRT) may have substantial effects on coronary circulation, a current area of controversy is whether these should be stopped prior to the use of a stress-inducing medication during MPI. To date, no formal drug interaction studies have been conducted between nicotine and regadenoson.⁵ Similarly, the ADVANCE MPI 2 Trial, which led to the US Food and Drug Administration approval of regadenoson, did not specify restrictions on the use of nicotine prior to stress testing in the protocol.⁶ However, as this trial was multicenter, investigators admit that individual study sites could have had their own restrictions on the use of nicotine prior to stress testing with regadenoson, but this information was not collected.⁶ The current review focuses on how the simultaneous use of nicotine or NRT during MPI with pharmacologic agents, such as regadenoson, may affect the accuracy of imaging results and the clinical impact of this interaction.

Nicotine Coronary Artery Effect

It is well documented that long-term cigarette smoking is a major risk factor for CAD.⁷ Compared with nonsmokers, cigarette smokers experience 2 times greater risk of morbidity and mortality from ischemic heart disease.⁷ There are several mechanisms by which nicotine induces damage to the myocardium (Figure). Nicotine has direct effects on both the sympathetic nervous system (SNS) and myocardial endothelium.⁸ Together, these factors result in reduced coronary blood flow, leading to less oxygen supply to meet an increased oxygen demand, resulting in myocardial ischemia.

Nicotine’s effect on coronary vasomotor tone occurs primarily through noradrenergic stimulation of α and β receptors associated with coronary vasoconstriction or vasodilation, respectively.^9,10 These competing influences on coronary blood flow appear to manifest differently based on whether patients are at rest or in a stressed state. A study by Czerin and colleagues demonstrated that in healthy patients with relatively short smoking histories and in a healthy nonsmoker control group, coronary blood flow increased by 25% and 40%, respectively, with nicotine use at rest.⁹ However, when these patients were stressed with dipyramidole and while smoking during the examination, myocardial blood flow was reduced by 11% in the study group and 14% in the control group.⁹ This is likely because the patients studied had relatively healthy coronary arteries that were able to maximally dilate when stressed. In this scenario, nicotine’s dilatory effects are offset by nicotine’s α-receptor–mediated vasoconstriction effects.⁹ Of note, patients in the study group experienced a somewhat diminished increase in coronary blood flow at rest with nicotine use, suggesting that even a short smoking history may damage the myocardial endothelium, rendering it less responsive to nicotine’s vasodilatory effects.⁹

Nicotine Replacement Therapy and Stress Testing

Given the association between cigarette smoking and CAD, medical practitioners strongly encourage patients to quit smoking to reduce their risk of adverse cardiovascular outcomes. Various smoking cessation treatments are available for patients. Common, readily accessible forms of therapy include nicotine replacement products (Table 2).

Early studies of NRT in patients with underlying CVD found an increased risk of cardiovascular events, such as myocardial infarction, presumably due to the nicotine content of these products.^13,14 However, the concentration of nicotine in NRT is substantially lower than that found in cigarettes and in some formulations, such as transdermal patches, nicotine is delivered over a prolonged period of time.¹⁵ For this reason, NRT is thought to be safe in patients with underlying CVD and stable ischemic heart disease. A recent systematic review and meta-analysis found that while NRT may be associated with tachycardia, it did not increase the risk of more serious cardiovascular adverse effects (AEs).^16,17

Given the lower nicotine concentration in NRT products, the associated hemodynamic effect of nicotine also is thought to be less pronounced. In a study conducted by Tzivoni and colleagues in patients with CAD using transdermal nicotine patches, no differences in blood pressure, heart rate, ischemia, or arrhythmias were found from baseline to 2 weeks.¹⁸ These findings were further confirmed in a small study by Lucini and colleagues, which found that nicotine patches produced slight hemodynamic effects, but to a lesser extent than cigarette smoking.¹⁹ For the NRT gum formulation, while a small study found that 4 mg produced coronary vasoconstriction in patients with underlying CAD, a study by Nitenberg and Antony demonstrated that healthy and diseased coronary arteries did not significantly constrict while patients were using nicotine gum both before and after a cold pressor test, suggesting a lesser degree of coronary vasoconstriction than nicotine from cigarette smoking.^20,21 Similar findings have been described with the nicotine intranasal spray in a study by Keeley and colleagues, which showed no additional AEs on myocardial demand or vasoconstriction when an intranasal nicotine spray was added to cigarette smoking.²² Importantly, a review of the transdermal and gum formulations found that these less pronounced hemodynamic effects were observed across different doses of NRT; however, further studies are needed to clarify the relationship between NRT dose and cardiovascular effects.²³

Overall, NRT does not seem to activate the SNS to the same degree as nicotine obtained via cigarette smoking and likely does not increase the myocardial oxygen demand as much. Additionally, by containing a lower concentration of nicotine, NRT may not impair the myocardium’s ability to supply oxygen to coronary arteries to the same extent as nicotine from cigarette smoking. Therefore, the effects of NRT on MPI using a stress-inducing medication may not be as pronounced. However, due to study limitations, results should be interpreted cautiously.^18-23

Conclusions

Because of the close relationship between cigarette smoking and CAD, many patients with underlying CVD are either current smokers or may be using NRT for smoking cessation. Therefore, the question of whether to refrain from nicotine use prior to MPI is clinically relevant. Currently, there is a lack of high-quality studies demonstrating the effects of nicotine and NRT on coronary perfusion. Because of this, the impact of nicotine and NRT use on the accuracy of MPI using stress-inducing medications remains uncertain. Nevertheless, given that nicotine and NRT may largely affect the accuracy of imaging results, several institutions have adopted protocols that prohibit patients from using these drugs on the day of nuclear stress testing.

There are currently no data specifying the number of hours to hold nicotine products prior to cardiac stress testing. It is generally recommended that other medications that affect coronary blood flow be held for 5 half-lives before conducting MPI.⁴ Following the same guidance for nicotine and NRT may present a reasonable approach to ensure accurate imaging results. Based on the discussed literature, patients should be instructed to refrain from cigarette smoking for at least 5 to 10 hours prior to MPI, given nicotine’s half-life of about 1 to 2 hours.²⁴

The data for NRT are less clear. While use of NRT may not be an absolute contraindication to conducting MPI, it is important to consider that this may affect the accuracy of results. Given this uncertainty, it is likely ideal to hold NRT prior to MPI, based on the specific formulation of NRT and that product's half-life. Further robust studies are needed to analyze the impact of nicotine and NRT on the accuracy of nuclear stress testing using a medication.

Chest pain is one of the most common concerns in patients presenting to the emergency department in the United States, accounting for approximately 7.6 million visits annually.¹ Given the high mortality rate associated with acute coronary syndromes, prompt evaluation of chest pain is essential.² Even in mild cases, recognition of newly onset or worsening coronary artery disease (CAD) is crucial to ensure that patients receive optimal medication therapy.

In symptomatic patients with risk factors for CAD, such as advanced age, hypertension, hyperlipidemia, obesity, and diabetes mellitus, myocardial perfusion imaging (MPI) is frequently used as a modality to assess the presence, location, and severity of ischemic or infarcted myocardium.² MPI requires administration of a radiopharmaceutical before and after the patient undergoes a form of stress.² This radiopharmaceutical is then detected in the myocardium with a nuclear camera, and images are obtained of the heart to assess myocardial blood flow.²

MPI can be performed using exercise-induced stress via a treadmill, or medication-induced stress (Table 1). In both strategies, healthy coronary arteries dilate to provide the myocardium with more blood flow to meet the increasing myocardial oxygen demand during this period of stress. While healthy vessels are able to dilate appropriately, coronary arteries with flow-limiting stenoses are unable to dilate to the same extent in response to stress.² Because radioactive isotope uptake by the myocardium is directly related to arterial blood flow, MPI is able to demonstrate a mismatch in coronary blood flow between healthy and diseased coronary arteries indicated by differences in radioisotope uptake.² The presence of such a mismatch, in conjunction with clinical history, potentially suggests the presence of CAD.

Because nicotine and nicotine replacement therapy (NRT) may have substantial effects on coronary circulation, a current area of controversy is whether these should be stopped prior to the use of a stress-inducing medication during MPI. To date, no formal drug interaction studies have been conducted between nicotine and regadenoson.⁵ Similarly, the ADVANCE MPI 2 Trial, which led to the US Food and Drug Administration approval of regadenoson, did not specify restrictions on the use of nicotine prior to stress testing in the protocol.⁶ However, as this trial was multicenter, investigators admit that individual study sites could have had their own restrictions on the use of nicotine prior to stress testing with regadenoson, but this information was not collected.⁶ The current review focuses on how the simultaneous use of nicotine or NRT during MPI with pharmacologic agents, such as regadenoson, may affect the accuracy of imaging results and the clinical impact of this interaction.

Nicotine Coronary Artery Effect

It is well documented that long-term cigarette smoking is a major risk factor for CAD.⁷ Compared with nonsmokers, cigarette smokers experience 2 times greater risk of morbidity and mortality from ischemic heart disease.⁷ There are several mechanisms by which nicotine induces damage to the myocardium (Figure). Nicotine has direct effects on both the sympathetic nervous system (SNS) and myocardial endothelium.⁸ Together, these factors result in reduced coronary blood flow, leading to less oxygen supply to meet an increased oxygen demand, resulting in myocardial ischemia.

Nicotine’s effect on coronary vasomotor tone occurs primarily through noradrenergic stimulation of α and β receptors associated with coronary vasoconstriction or vasodilation, respectively.^9,10 These competing influences on coronary blood flow appear to manifest differently based on whether patients are at rest or in a stressed state. A study by Czerin and colleagues demonstrated that in healthy patients with relatively short smoking histories and in a healthy nonsmoker control group, coronary blood flow increased by 25% and 40%, respectively, with nicotine use at rest.⁹ However, when these patients were stressed with dipyramidole and while smoking during the examination, myocardial blood flow was reduced by 11% in the study group and 14% in the control group.⁹ This is likely because the patients studied had relatively healthy coronary arteries that were able to maximally dilate when stressed. In this scenario, nicotine’s dilatory effects are offset by nicotine’s α-receptor–mediated vasoconstriction effects.⁹ Of note, patients in the study group experienced a somewhat diminished increase in coronary blood flow at rest with nicotine use, suggesting that even a short smoking history may damage the myocardial endothelium, rendering it less responsive to nicotine’s vasodilatory effects.⁹

Nicotine Replacement Therapy and Stress Testing

Given the association between cigarette smoking and CAD, medical practitioners strongly encourage patients to quit smoking to reduce their risk of adverse cardiovascular outcomes. Various smoking cessation treatments are available for patients. Common, readily accessible forms of therapy include nicotine replacement products (Table 2).

Early studies of NRT in patients with underlying CVD found an increased risk of cardiovascular events, such as myocardial infarction, presumably due to the nicotine content of these products.^13,14 However, the concentration of nicotine in NRT is substantially lower than that found in cigarettes and in some formulations, such as transdermal patches, nicotine is delivered over a prolonged period of time.¹⁵ For this reason, NRT is thought to be safe in patients with underlying CVD and stable ischemic heart disease. A recent systematic review and meta-analysis found that while NRT may be associated with tachycardia, it did not increase the risk of more serious cardiovascular adverse effects (AEs).^16,17

Given the lower nicotine concentration in NRT products, the associated hemodynamic effect of nicotine also is thought to be less pronounced. In a study conducted by Tzivoni and colleagues in patients with CAD using transdermal nicotine patches, no differences in blood pressure, heart rate, ischemia, or arrhythmias were found from baseline to 2 weeks.¹⁸ These findings were further confirmed in a small study by Lucini and colleagues, which found that nicotine patches produced slight hemodynamic effects, but to a lesser extent than cigarette smoking.¹⁹ For the NRT gum formulation, while a small study found that 4 mg produced coronary vasoconstriction in patients with underlying CAD, a study by Nitenberg and Antony demonstrated that healthy and diseased coronary arteries did not significantly constrict while patients were using nicotine gum both before and after a cold pressor test, suggesting a lesser degree of coronary vasoconstriction than nicotine from cigarette smoking.^20,21 Similar findings have been described with the nicotine intranasal spray in a study by Keeley and colleagues, which showed no additional AEs on myocardial demand or vasoconstriction when an intranasal nicotine spray was added to cigarette smoking.²² Importantly, a review of the transdermal and gum formulations found that these less pronounced hemodynamic effects were observed across different doses of NRT; however, further studies are needed to clarify the relationship between NRT dose and cardiovascular effects.²³

Overall, NRT does not seem to activate the SNS to the same degree as nicotine obtained via cigarette smoking and likely does not increase the myocardial oxygen demand as much. Additionally, by containing a lower concentration of nicotine, NRT may not impair the myocardium’s ability to supply oxygen to coronary arteries to the same extent as nicotine from cigarette smoking. Therefore, the effects of NRT on MPI using a stress-inducing medication may not be as pronounced. However, due to study limitations, results should be interpreted cautiously.^18-23

Conclusions

Because of the close relationship between cigarette smoking and CAD, many patients with underlying CVD are either current smokers or may be using NRT for smoking cessation. Therefore, the question of whether to refrain from nicotine use prior to MPI is clinically relevant. Currently, there is a lack of high-quality studies demonstrating the effects of nicotine and NRT on coronary perfusion. Because of this, the impact of nicotine and NRT use on the accuracy of MPI using stress-inducing medications remains uncertain. Nevertheless, given that nicotine and NRT may largely affect the accuracy of imaging results, several institutions have adopted protocols that prohibit patients from using these drugs on the day of nuclear stress testing.

There are currently no data specifying the number of hours to hold nicotine products prior to cardiac stress testing. It is generally recommended that other medications that affect coronary blood flow be held for 5 half-lives before conducting MPI.⁴ Following the same guidance for nicotine and NRT may present a reasonable approach to ensure accurate imaging results. Based on the discussed literature, patients should be instructed to refrain from cigarette smoking for at least 5 to 10 hours prior to MPI, given nicotine’s half-life of about 1 to 2 hours.²⁴

The data for NRT are less clear. While use of NRT may not be an absolute contraindication to conducting MPI, it is important to consider that this may affect the accuracy of results. Given this uncertainty, it is likely ideal to hold NRT prior to MPI, based on the specific formulation of NRT and that product's half-life. Further robust studies are needed to analyze the impact of nicotine and NRT on the accuracy of nuclear stress testing using a medication.

I would like to start the new year off by returning to the past – when the physical exam was emphasized and utilized in decision making. I think a big reason that its use has diminished in recent years is due to the physical exam not having been emphasized in training.

For those seeking to increase their comfort with conducting the physical exam, below are several methods I have found helpful to use in practice.
 

Examining the pharynx

We were usually taught to ask the patient to say ahhh, with or without a nasty tongue depressor.

When I was on my pediatrics rotation, I was taught to ask the patients to roar like a lion, which always gave a nice look at their posterior pharynx. The kids also really liked doing this, but it might seem a little strange to ask adults to do this.

A technique I have found that works well with adults is to ask them to yawn. I have found that this get me a great look at the pharynx for about half of my patients.
 

Auscultatory percussion for pleural effusions

Guarino and colleagues described a technique that is easily mastered and very effective for determining the presence of pleural effusions.¹ It involves placing the stethoscope 3 cm below the last rib in the mid clavicular line and tapping from the apex down to the last rib.

For patients without effusion, a sharp change to a loud percussion note will occur at the last rib.

If the patient has an effusion, the loud percussion note will start at the top of the effusion.

This method was remarkably successful at finding pleural effusions. In the study, Dr. Guarino found a sensitivity of 96% and a specificity of 100%.
 

Physical exam for anemia

Look at the nails and see if they look pale. How can we do this?

The first step is to know what your own hematocrit is. You can then compare the color of your nail to that of the patient.

If you have a normal hematocrit and the patient’s nail bed color is lighter than yours, the patient likely has anemia. If you do this frequently, you will get good at estimating hematocrit. This is especially important if you do not have labs readily available.

Another way to assess for anemia is to look at the color tint of the lower conjunctiva. The best way to look for this is to look at whether there is a generous amount of visible capillaries in the lower conjunctiva. Patients without anemia have a darker red color because of these vessels, whereas patients with anemia are a lighter pink.

Strobach and colleagues² looked at both nail bed rubor and color tint of the lower conjunctiva and found that both reliably predicted presence and degree of anemia.

Determining if clubbing is present

Most physicians are aware of Shamroth sign, and use it to evaluate for clubbing. Shamroth sign is the loss of the diamond that is created by placing the back surfaces of opposite terminal phalanges together.

I have found that it’s easier to diagnose mild clubbing by looking at the finger in profile. If the ratio of the distal phalangeal depth compared to the depth across the distal interphalangeal joint is greater than 1:1, then clubbing is present.³

Pearls

1. Have the patient try yawning to better see the pharynx without using a tongue blade.

2. Try the technique of auscultatory percussion to be more accurate at picking up pleural effusions.

3. Know your hematocrit, so you can better use color shade to assess for anemia.

4. Try looking at fingers in profile to pick up clubbing.

Dr. Paauw is professor of medicine in the division of general internal medicine at the University of Washington, Seattle, and serves as 3rd-year medical student clerkship director at the University of Washington. He is a member of the editorial advisory board of Internal Medicine News. Dr. Paauw has no conflicts to disclose. Contact him at [email protected].

References

1. Guarino JR and Guarino JC. Auscultatory percussion: A simple method to detect pleural effusion. J Gen Intern Med. 1994 Feb;9(2):71-4.

2. Strobach RS et al. The value of the physical examination in the diagnosis of anemia. Correlation of the physical findings and the hemoglobin concentration. Arch Intern Med. 1988 Apr;148(4):831-2.

3. Spicknall KE et al. Clubbing: an update on diagnosis, differential diagnosis, pathophysiology, and clinical relevance. J Am Acad Dermatol. 2005 Jun;52(6):1020-8.

I would like to start the new year off by returning to the past – when the physical exam was emphasized and utilized in decision making. I think a big reason that its use has diminished in recent years is due to the physical exam not having been emphasized in training.

For those seeking to increase their comfort with conducting the physical exam, below are several methods I have found helpful to use in practice.
 

Examining the pharynx

We were usually taught to ask the patient to say ahhh, with or without a nasty tongue depressor.

When I was on my pediatrics rotation, I was taught to ask the patients to roar like a lion, which always gave a nice look at their posterior pharynx. The kids also really liked doing this, but it might seem a little strange to ask adults to do this.

A technique I have found that works well with adults is to ask them to yawn. I have found that this get me a great look at the pharynx for about half of my patients.
 

Auscultatory percussion for pleural effusions

Guarino and colleagues described a technique that is easily mastered and very effective for determining the presence of pleural effusions.¹ It involves placing the stethoscope 3 cm below the last rib in the mid clavicular line and tapping from the apex down to the last rib.

For patients without effusion, a sharp change to a loud percussion note will occur at the last rib.

If the patient has an effusion, the loud percussion note will start at the top of the effusion.

This method was remarkably successful at finding pleural effusions. In the study, Dr. Guarino found a sensitivity of 96% and a specificity of 100%.
 

Physical exam for anemia

Look at the nails and see if they look pale. How can we do this?

The first step is to know what your own hematocrit is. You can then compare the color of your nail to that of the patient.

If you have a normal hematocrit and the patient’s nail bed color is lighter than yours, the patient likely has anemia. If you do this frequently, you will get good at estimating hematocrit. This is especially important if you do not have labs readily available.

Another way to assess for anemia is to look at the color tint of the lower conjunctiva. The best way to look for this is to look at whether there is a generous amount of visible capillaries in the lower conjunctiva. Patients without anemia have a darker red color because of these vessels, whereas patients with anemia are a lighter pink.

Strobach and colleagues² looked at both nail bed rubor and color tint of the lower conjunctiva and found that both reliably predicted presence and degree of anemia.

Determining if clubbing is present

Most physicians are aware of Shamroth sign, and use it to evaluate for clubbing. Shamroth sign is the loss of the diamond that is created by placing the back surfaces of opposite terminal phalanges together.

I have found that it’s easier to diagnose mild clubbing by looking at the finger in profile. If the ratio of the distal phalangeal depth compared to the depth across the distal interphalangeal joint is greater than 1:1, then clubbing is present.³

Pearls

1. Have the patient try yawning to better see the pharynx without using a tongue blade.

2. Try the technique of auscultatory percussion to be more accurate at picking up pleural effusions.

3. Know your hematocrit, so you can better use color shade to assess for anemia.

4. Try looking at fingers in profile to pick up clubbing.

Dr. Paauw is professor of medicine in the division of general internal medicine at the University of Washington, Seattle, and serves as 3rd-year medical student clerkship director at the University of Washington. He is a member of the editorial advisory board of Internal Medicine News. Dr. Paauw has no conflicts to disclose. Contact him at [email protected].

References

1. Guarino JR and Guarino JC. Auscultatory percussion: A simple method to detect pleural effusion. J Gen Intern Med. 1994 Feb;9(2):71-4.

2. Strobach RS et al. The value of the physical examination in the diagnosis of anemia. Correlation of the physical findings and the hemoglobin concentration. Arch Intern Med. 1988 Apr;148(4):831-2.

3. Spicknall KE et al. Clubbing: an update on diagnosis, differential diagnosis, pathophysiology, and clinical relevance. J Am Acad Dermatol. 2005 Jun;52(6):1020-8.

I would like to start the new year off by returning to the past – when the physical exam was emphasized and utilized in decision making. I think a big reason that its use has diminished in recent years is due to the physical exam not having been emphasized in training.

For those seeking to increase their comfort with conducting the physical exam, below are several methods I have found helpful to use in practice.
 

Examining the pharynx

We were usually taught to ask the patient to say ahhh, with or without a nasty tongue depressor.

When I was on my pediatrics rotation, I was taught to ask the patients to roar like a lion, which always gave a nice look at their posterior pharynx. The kids also really liked doing this, but it might seem a little strange to ask adults to do this.

A technique I have found that works well with adults is to ask them to yawn. I have found that this get me a great look at the pharynx for about half of my patients.
 

Auscultatory percussion for pleural effusions

Guarino and colleagues described a technique that is easily mastered and very effective for determining the presence of pleural effusions.¹ It involves placing the stethoscope 3 cm below the last rib in the mid clavicular line and tapping from the apex down to the last rib.

For patients without effusion, a sharp change to a loud percussion note will occur at the last rib.

If the patient has an effusion, the loud percussion note will start at the top of the effusion.

This method was remarkably successful at finding pleural effusions. In the study, Dr. Guarino found a sensitivity of 96% and a specificity of 100%.
 

Physical exam for anemia

Look at the nails and see if they look pale. How can we do this?

The first step is to know what your own hematocrit is. You can then compare the color of your nail to that of the patient.

If you have a normal hematocrit and the patient’s nail bed color is lighter than yours, the patient likely has anemia. If you do this frequently, you will get good at estimating hematocrit. This is especially important if you do not have labs readily available.

Another way to assess for anemia is to look at the color tint of the lower conjunctiva. The best way to look for this is to look at whether there is a generous amount of visible capillaries in the lower conjunctiva. Patients without anemia have a darker red color because of these vessels, whereas patients with anemia are a lighter pink.

Strobach and colleagues² looked at both nail bed rubor and color tint of the lower conjunctiva and found that both reliably predicted presence and degree of anemia.

Determining if clubbing is present

Most physicians are aware of Shamroth sign, and use it to evaluate for clubbing. Shamroth sign is the loss of the diamond that is created by placing the back surfaces of opposite terminal phalanges together.

I have found that it’s easier to diagnose mild clubbing by looking at the finger in profile. If the ratio of the distal phalangeal depth compared to the depth across the distal interphalangeal joint is greater than 1:1, then clubbing is present.³

Pearls

1. Have the patient try yawning to better see the pharynx without using a tongue blade.

2. Try the technique of auscultatory percussion to be more accurate at picking up pleural effusions.

3. Know your hematocrit, so you can better use color shade to assess for anemia.

4. Try looking at fingers in profile to pick up clubbing.

Dr. Paauw is professor of medicine in the division of general internal medicine at the University of Washington, Seattle, and serves as 3rd-year medical student clerkship director at the University of Washington. He is a member of the editorial advisory board of Internal Medicine News. Dr. Paauw has no conflicts to disclose. Contact him at [email protected].

References

1. Guarino JR and Guarino JC. Auscultatory percussion: A simple method to detect pleural effusion. J Gen Intern Med. 1994 Feb;9(2):71-4.

2. Strobach RS et al. The value of the physical examination in the diagnosis of anemia. Correlation of the physical findings and the hemoglobin concentration. Arch Intern Med. 1988 Apr;148(4):831-2.

3. Spicknall KE et al. Clubbing: an update on diagnosis, differential diagnosis, pathophysiology, and clinical relevance. J Am Acad Dermatol. 2005 Jun;52(6):1020-8.

Preschoolers who experienced community-acquired pneumonia in infancy were significantly more likely than were those with no history of pneumonia to develop chronic respiratory disorders, based on data from approximately 7,000 individuals.

“Lower respiratory tract infections (LRTI) during the first years of life cause injury to the rapidly developing lung at its most critical stage,” wrote Rotem Lapidot, MD, of Boston University, and colleagues. Previous research has linked pneumonia with subsequent chronic cough, bronchitis, and recurrent pneumonia in children, but data are needed to assess the impact of early community-acquired pneumonia (CAP) on respiratory health in otherwise healthy infants, the researchers said.

In a retrospective matched cohort study published in Respiratory Medicine , the researchers identified 1,343 infants who had CAP in the first 2 years of life, and 6,715 controls, using a large electronic health records dataset (Optum EHR dataset) for the period from Jan. 2011 through June 2018.

The primary outcomes were the development of any chronic respiratory disorders, reactive airway disease, and CAP hospitalizations between ages 2 and 5 years. Infants in the CAP group were otherwise healthy; those with congenital or other conditions that might predispose them to pneumonia were excluded. Baseline characteristics were similar between the CAP patients and controls.
 

Future risk

Overall, the rates per 100 patient-years for any chronic respiratory disorder were 11.6 for CAP patients versus 4.9 for controls (relative risk, 2.4). Rates for reactive airway disease and CAP hospitalization were 6.1 versus 1.9 per 100 patient-years (RR, 3.2) and 1.0 versus 0.2 per 100 patient-years (RR, 6.3) for the CAP patients and controls, respectively.

The distribution of CAP etiology of CAP in infants at the first hospitalization was 20% bacterial, 27% viral, and 53% unspecified. The relative rates of later respiratory illness were similar across etiologies of the initial hospitalization for CAP, which support the association between infant CAP and later respiratory disease, the researchers said.

Nearly all (97%) of the CAP patients had only one qualifying hospitalization for CAP before 2 years of age, and the mean age at the first hospitalization was 8.9 months. “Rates and relative rates of any chronic respiratory disorder, and our composite for reactive airway disease, increased with age at which the initial CAP hospitalization occurred,” and were highest for children hospitalized at close to 2 years of age, the researchers noted.
 

Persistent inflammation?

“Our findings add to the evolving hypothesis that persistent inflammation following pneumonia creates an increased risk for subsequent respiratory disease and exacerbations of underlying disease,” the researchers wrote.

The study findings were limited by several factors, including the potential for misclassification of some infants with and without underlying conditions, reliance on discharge information for etiology, and possible lack of generalizability to other populations, the researchers noted.

However, the results indicate an increased risk for respiratory illness in early childhood among infants with CAP, and support the need for greater attention to CAP prevention and for strategies to reduce inflammation after pneumonia, they said. “Further study is needed to confirm the long-term consequences of infant CAP and the underlying mechanisms that lead to such long-term sequelae,” they concluded.

Dr. Lapidot and several coauthors disclosed ties with Pfizer, the study sponsor.

A version of this article first appeared on Medscape.com.

Preschoolers who experienced community-acquired pneumonia in infancy were significantly more likely than were those with no history of pneumonia to develop chronic respiratory disorders, based on data from approximately 7,000 individuals.

“Lower respiratory tract infections (LRTI) during the first years of life cause injury to the rapidly developing lung at its most critical stage,” wrote Rotem Lapidot, MD, of Boston University, and colleagues. Previous research has linked pneumonia with subsequent chronic cough, bronchitis, and recurrent pneumonia in children, but data are needed to assess the impact of early community-acquired pneumonia (CAP) on respiratory health in otherwise healthy infants, the researchers said.

In a retrospective matched cohort study published in Respiratory Medicine , the researchers identified 1,343 infants who had CAP in the first 2 years of life, and 6,715 controls, using a large electronic health records dataset (Optum EHR dataset) for the period from Jan. 2011 through June 2018.

The primary outcomes were the development of any chronic respiratory disorders, reactive airway disease, and CAP hospitalizations between ages 2 and 5 years. Infants in the CAP group were otherwise healthy; those with congenital or other conditions that might predispose them to pneumonia were excluded. Baseline characteristics were similar between the CAP patients and controls.
 

Future risk

Overall, the rates per 100 patient-years for any chronic respiratory disorder were 11.6 for CAP patients versus 4.9 for controls (relative risk, 2.4). Rates for reactive airway disease and CAP hospitalization were 6.1 versus 1.9 per 100 patient-years (RR, 3.2) and 1.0 versus 0.2 per 100 patient-years (RR, 6.3) for the CAP patients and controls, respectively.

The distribution of CAP etiology of CAP in infants at the first hospitalization was 20% bacterial, 27% viral, and 53% unspecified. The relative rates of later respiratory illness were similar across etiologies of the initial hospitalization for CAP, which support the association between infant CAP and later respiratory disease, the researchers said.

Nearly all (97%) of the CAP patients had only one qualifying hospitalization for CAP before 2 years of age, and the mean age at the first hospitalization was 8.9 months. “Rates and relative rates of any chronic respiratory disorder, and our composite for reactive airway disease, increased with age at which the initial CAP hospitalization occurred,” and were highest for children hospitalized at close to 2 years of age, the researchers noted.
 

Persistent inflammation?

“Our findings add to the evolving hypothesis that persistent inflammation following pneumonia creates an increased risk for subsequent respiratory disease and exacerbations of underlying disease,” the researchers wrote.

The study findings were limited by several factors, including the potential for misclassification of some infants with and without underlying conditions, reliance on discharge information for etiology, and possible lack of generalizability to other populations, the researchers noted.

However, the results indicate an increased risk for respiratory illness in early childhood among infants with CAP, and support the need for greater attention to CAP prevention and for strategies to reduce inflammation after pneumonia, they said. “Further study is needed to confirm the long-term consequences of infant CAP and the underlying mechanisms that lead to such long-term sequelae,” they concluded.

Dr. Lapidot and several coauthors disclosed ties with Pfizer, the study sponsor.

A version of this article first appeared on Medscape.com.

Preschoolers who experienced community-acquired pneumonia in infancy were significantly more likely than were those with no history of pneumonia to develop chronic respiratory disorders, based on data from approximately 7,000 individuals.

“Lower respiratory tract infections (LRTI) during the first years of life cause injury to the rapidly developing lung at its most critical stage,” wrote Rotem Lapidot, MD, of Boston University, and colleagues. Previous research has linked pneumonia with subsequent chronic cough, bronchitis, and recurrent pneumonia in children, but data are needed to assess the impact of early community-acquired pneumonia (CAP) on respiratory health in otherwise healthy infants, the researchers said.

In a retrospective matched cohort study published in Respiratory Medicine , the researchers identified 1,343 infants who had CAP in the first 2 years of life, and 6,715 controls, using a large electronic health records dataset (Optum EHR dataset) for the period from Jan. 2011 through June 2018.

The primary outcomes were the development of any chronic respiratory disorders, reactive airway disease, and CAP hospitalizations between ages 2 and 5 years. Infants in the CAP group were otherwise healthy; those with congenital or other conditions that might predispose them to pneumonia were excluded. Baseline characteristics were similar between the CAP patients and controls.
 

Future risk

Overall, the rates per 100 patient-years for any chronic respiratory disorder were 11.6 for CAP patients versus 4.9 for controls (relative risk, 2.4). Rates for reactive airway disease and CAP hospitalization were 6.1 versus 1.9 per 100 patient-years (RR, 3.2) and 1.0 versus 0.2 per 100 patient-years (RR, 6.3) for the CAP patients and controls, respectively.

The distribution of CAP etiology of CAP in infants at the first hospitalization was 20% bacterial, 27% viral, and 53% unspecified. The relative rates of later respiratory illness were similar across etiologies of the initial hospitalization for CAP, which support the association between infant CAP and later respiratory disease, the researchers said.

Nearly all (97%) of the CAP patients had only one qualifying hospitalization for CAP before 2 years of age, and the mean age at the first hospitalization was 8.9 months. “Rates and relative rates of any chronic respiratory disorder, and our composite for reactive airway disease, increased with age at which the initial CAP hospitalization occurred,” and were highest for children hospitalized at close to 2 years of age, the researchers noted.
 

Persistent inflammation?

“Our findings add to the evolving hypothesis that persistent inflammation following pneumonia creates an increased risk for subsequent respiratory disease and exacerbations of underlying disease,” the researchers wrote.

The study findings were limited by several factors, including the potential for misclassification of some infants with and without underlying conditions, reliance on discharge information for etiology, and possible lack of generalizability to other populations, the researchers noted.

However, the results indicate an increased risk for respiratory illness in early childhood among infants with CAP, and support the need for greater attention to CAP prevention and for strategies to reduce inflammation after pneumonia, they said. “Further study is needed to confirm the long-term consequences of infant CAP and the underlying mechanisms that lead to such long-term sequelae,” they concluded.

Dr. Lapidot and several coauthors disclosed ties with Pfizer, the study sponsor.

A version of this article first appeared on Medscape.com.

Patients with chronic obstructive pulmonary disease (COPD) who are both frail and who have poor lung function or dyspnea are at especially high risk of disability within 3 to 5 years as well as all-cause mortality years later, a prospective cohort study of community-dwelling adults has shown.

“Frailty, a widely recognized geriatric syndrome characterized by multidimensional functional decline in bio-psycho-social factors, is associated with functional disability and mortality,” senior author Tze Pin Ng, MD, National University of Singapore, and colleagues explain.“Our results ... suggest that beyond traditional prognostic markers such as FEV1% (forced expiratory volume in 1 second) and dyspnea, the physical frailty phenotype provides additional useful prognostic information on future risks of disability and mortality,” the authors suggest.

The study was published online Dec. 12 in the journal CHEST^®.

SLAS-1 and SLAS-2

Data from the Singapore Longitudinal Ageing Study (SLAS-1) and SLAS-2 were collected and analyzed. SLAS-1 recruited 2,804 participants 55 years of age and older from Sept. 2003 through Dec. 2004, while SLAS-2 recruited 3,270 participants of the same age between March 2009 and June 2013. “Follow-up visits and assessments were conducted approximately 3-5 years apart,” the investigators noted.

Mortality was determined at a mean of 9.5 years of follow-up for SLAS-1 participants and a mean of 6.5 years’ follow-up for SLAS-2 participants. A total of 4,627 participants were eventually included in the analysis, of whom 1,162 patients had COPD and 3,465 patients did not. COPD was classified as mild if FEV1% was greater than or equal to 80%; moderate if FEV1% was greater than or equal to 50% to less than 80%, and severe if FEV1% was less than 50%.

Frailty in turn was based on five clinical criteria, including weakness, slowness, low physical activity, exhaustion, and shrinking. Participants were classified as frail if they met three or more of these criteria and prefrail if they met one or two criteria.

Adverse health outcomes were judged on the basis of instrumental or basic activities of daily living (IADL/ADL), while disability was judged by self-reported difficulties in or requiring assistance with at least one IADL or ADL.
 

Frail or prefrail

Almost half of the participants were frail or prefrail, as the authors reported, while 25% had COPD. Among the participants with COPD, 30% had moderate to severe COPD, 6.4% had dyspnea, and almost half had prefrailty, while approximately 7% were classified as frail.

This percentage was 86% higher than it was for participants without COPD, among whom just 3.2% were assessed as frail, at an odds ratio of 1.86 (95% CI, 1.35-2.56). Further adjustments for possible confounders reduced the gap between frail COPD and frail non-COPD participants, but frailty remained significantly associated with COPD, at an OR of 1.61 (95% CI, 1.15-2.26), the investigators note.

Furthermore, compared to those without COPD, a diagnosis of COPD without and with dyspnea was associated with a 1.5- and 4.2-fold increase in prevalent frailty (95% CI, 1.04-2.08; 1.84-9.19), respectively, although not with prefrailty. Again, adjusting for multiple confounders, FEV1%, dyspnea, and both prefrailty and frailty were associated with an approximately twofold higher prevalence of IADL/ADL disability, while the prevalence of IADL/ADL disability for participants with COPD was approximately fourfold higher in those with co-occurring FEV1% less than 80% with either prefrailty, frailty, or dyspnea.

Furthermore, the presence of prefrailty or frailty in combination with a lower FEV1% or dyspnea was associated with a 3.7- to 3.8-fold increased risk of having an IADL or ADL disability.
 

Frailty and mortality

Some 1,116 participants with COPD were followed for a mean of 2,981 days for mortality outcomes. Both FEV1% less than 50% and the presence of prefrailty and frailty almost doubled the risk of mortality, at an adjusted hazard ratio of 1.8 (95% CI, 1.24-2.68) compared to patients with an FEV1% greater than or equal to 80%. In combination with either FEV1% less than 80% or prefrailty/frailty, dyspnea almost more than doubled the risk of mortality, at an HR of 2.4 for both combinations.

“However, the mortality risk of participants with COPD was highest among those with FEV1% less than 80% and prefrailty/frailty,” the authors note, more than tripling mortality risk at an adjusted HR of 3.25 (95% CI, 1.97-5.36). Interestingly, FEV1 less than 80% and prefrailty/frailty – both alone and in combination – were also associated with a twofold to fourfold increased risk of IADL or ADL disability in participants without COPD but were less strongly associated with mortality.

Researchers then went on to create a summary risk score containing all relevant variables with values ranging from 0 to 5. The highest risk category of 3 to 5 was associated with a 7- to 8.5-fold increased risk for IADL and ADL disability and mortality among participants with COPD, and that risk remained high after adjusting for multiple confounders.

Interestingly, frailty did not significantly predict mortality in women, while dyspnea did not significantly predict mortality in men. “Recognition and assessment of physical frailty in addition to FEV1% and dyspnea would allow for more accurate identification and targeted treatment of COPD at risk of future adverse outcomes,” the authors suggest.
 

Frailty scoring system

Asked to comment on the study, Sachin Gupta, MD, a pulmonologist and critical care specialist at Alameda Health System in Oakland, Calif., noted that the current study adds to the body of literature that outcomes in patients with COPD depend as much on objectively measured variables as on qualitative measures. “By applying a frailty scoring system, these researchers were able to categorize frailty and study its impact on patient characteristics and outcomes,” he told this news organization in an email.

The summary risk assessment tool developed and assessed is familiar: It carries parallels to the widely utilized BODE Index, replacing body mass index and 6-minute walk distance with the frailty scale, he added. “Findings from this study support the idea that what meets the eye in face-to-face visits – frailty – can be codified and be part of a tool that is predictive of outcomes,” Dr. Gupta underscored.

The authors had no conflicts of interest to declare. Dr. Gupta disclosed that he is also an employee and shareholder at Genentech.

A version of this article first appeared on Medscape.com.

Patients with chronic obstructive pulmonary disease (COPD) who are both frail and who have poor lung function or dyspnea are at especially high risk of disability within 3 to 5 years as well as all-cause mortality years later, a prospective cohort study of community-dwelling adults has shown.

“Frailty, a widely recognized geriatric syndrome characterized by multidimensional functional decline in bio-psycho-social factors, is associated with functional disability and mortality,” senior author Tze Pin Ng, MD, National University of Singapore, and colleagues explain.“Our results ... suggest that beyond traditional prognostic markers such as FEV1% (forced expiratory volume in 1 second) and dyspnea, the physical frailty phenotype provides additional useful prognostic information on future risks of disability and mortality,” the authors suggest.

The study was published online Dec. 12 in the journal CHEST^®.

SLAS-1 and SLAS-2

Data from the Singapore Longitudinal Ageing Study (SLAS-1) and SLAS-2 were collected and analyzed. SLAS-1 recruited 2,804 participants 55 years of age and older from Sept. 2003 through Dec. 2004, while SLAS-2 recruited 3,270 participants of the same age between March 2009 and June 2013. “Follow-up visits and assessments were conducted approximately 3-5 years apart,” the investigators noted.

Mortality was determined at a mean of 9.5 years of follow-up for SLAS-1 participants and a mean of 6.5 years’ follow-up for SLAS-2 participants. A total of 4,627 participants were eventually included in the analysis, of whom 1,162 patients had COPD and 3,465 patients did not. COPD was classified as mild if FEV1% was greater than or equal to 80%; moderate if FEV1% was greater than or equal to 50% to less than 80%, and severe if FEV1% was less than 50%.

Frailty in turn was based on five clinical criteria, including weakness, slowness, low physical activity, exhaustion, and shrinking. Participants were classified as frail if they met three or more of these criteria and prefrail if they met one or two criteria.

Adverse health outcomes were judged on the basis of instrumental or basic activities of daily living (IADL/ADL), while disability was judged by self-reported difficulties in or requiring assistance with at least one IADL or ADL.
 

Frail or prefrail

Almost half of the participants were frail or prefrail, as the authors reported, while 25% had COPD. Among the participants with COPD, 30% had moderate to severe COPD, 6.4% had dyspnea, and almost half had prefrailty, while approximately 7% were classified as frail.

This percentage was 86% higher than it was for participants without COPD, among whom just 3.2% were assessed as frail, at an odds ratio of 1.86 (95% CI, 1.35-2.56). Further adjustments for possible confounders reduced the gap between frail COPD and frail non-COPD participants, but frailty remained significantly associated with COPD, at an OR of 1.61 (95% CI, 1.15-2.26), the investigators note.

Furthermore, compared to those without COPD, a diagnosis of COPD without and with dyspnea was associated with a 1.5- and 4.2-fold increase in prevalent frailty (95% CI, 1.04-2.08; 1.84-9.19), respectively, although not with prefrailty. Again, adjusting for multiple confounders, FEV1%, dyspnea, and both prefrailty and frailty were associated with an approximately twofold higher prevalence of IADL/ADL disability, while the prevalence of IADL/ADL disability for participants with COPD was approximately fourfold higher in those with co-occurring FEV1% less than 80% with either prefrailty, frailty, or dyspnea.

Furthermore, the presence of prefrailty or frailty in combination with a lower FEV1% or dyspnea was associated with a 3.7- to 3.8-fold increased risk of having an IADL or ADL disability.
 

Frailty and mortality

Some 1,116 participants with COPD were followed for a mean of 2,981 days for mortality outcomes. Both FEV1% less than 50% and the presence of prefrailty and frailty almost doubled the risk of mortality, at an adjusted hazard ratio of 1.8 (95% CI, 1.24-2.68) compared to patients with an FEV1% greater than or equal to 80%. In combination with either FEV1% less than 80% or prefrailty/frailty, dyspnea almost more than doubled the risk of mortality, at an HR of 2.4 for both combinations.

“However, the mortality risk of participants with COPD was highest among those with FEV1% less than 80% and prefrailty/frailty,” the authors note, more than tripling mortality risk at an adjusted HR of 3.25 (95% CI, 1.97-5.36). Interestingly, FEV1 less than 80% and prefrailty/frailty – both alone and in combination – were also associated with a twofold to fourfold increased risk of IADL or ADL disability in participants without COPD but were less strongly associated with mortality.

Researchers then went on to create a summary risk score containing all relevant variables with values ranging from 0 to 5. The highest risk category of 3 to 5 was associated with a 7- to 8.5-fold increased risk for IADL and ADL disability and mortality among participants with COPD, and that risk remained high after adjusting for multiple confounders.

Interestingly, frailty did not significantly predict mortality in women, while dyspnea did not significantly predict mortality in men. “Recognition and assessment of physical frailty in addition to FEV1% and dyspnea would allow for more accurate identification and targeted treatment of COPD at risk of future adverse outcomes,” the authors suggest.
 

Frailty scoring system

Asked to comment on the study, Sachin Gupta, MD, a pulmonologist and critical care specialist at Alameda Health System in Oakland, Calif., noted that the current study adds to the body of literature that outcomes in patients with COPD depend as much on objectively measured variables as on qualitative measures. “By applying a frailty scoring system, these researchers were able to categorize frailty and study its impact on patient characteristics and outcomes,” he told this news organization in an email.

The summary risk assessment tool developed and assessed is familiar: It carries parallels to the widely utilized BODE Index, replacing body mass index and 6-minute walk distance with the frailty scale, he added. “Findings from this study support the idea that what meets the eye in face-to-face visits – frailty – can be codified and be part of a tool that is predictive of outcomes,” Dr. Gupta underscored.

The authors had no conflicts of interest to declare. Dr. Gupta disclosed that he is also an employee and shareholder at Genentech.

A version of this article first appeared on Medscape.com.

Patients with chronic obstructive pulmonary disease (COPD) who are both frail and who have poor lung function or dyspnea are at especially high risk of disability within 3 to 5 years as well as all-cause mortality years later, a prospective cohort study of community-dwelling adults has shown.

“Frailty, a widely recognized geriatric syndrome characterized by multidimensional functional decline in bio-psycho-social factors, is associated with functional disability and mortality,” senior author Tze Pin Ng, MD, National University of Singapore, and colleagues explain.“Our results ... suggest that beyond traditional prognostic markers such as FEV1% (forced expiratory volume in 1 second) and dyspnea, the physical frailty phenotype provides additional useful prognostic information on future risks of disability and mortality,” the authors suggest.

The study was published online Dec. 12 in the journal CHEST^®.

SLAS-1 and SLAS-2

Data from the Singapore Longitudinal Ageing Study (SLAS-1) and SLAS-2 were collected and analyzed. SLAS-1 recruited 2,804 participants 55 years of age and older from Sept. 2003 through Dec. 2004, while SLAS-2 recruited 3,270 participants of the same age between March 2009 and June 2013. “Follow-up visits and assessments were conducted approximately 3-5 years apart,” the investigators noted.

Mortality was determined at a mean of 9.5 years of follow-up for SLAS-1 participants and a mean of 6.5 years’ follow-up for SLAS-2 participants. A total of 4,627 participants were eventually included in the analysis, of whom 1,162 patients had COPD and 3,465 patients did not. COPD was classified as mild if FEV1% was greater than or equal to 80%; moderate if FEV1% was greater than or equal to 50% to less than 80%, and severe if FEV1% was less than 50%.

Frailty in turn was based on five clinical criteria, including weakness, slowness, low physical activity, exhaustion, and shrinking. Participants were classified as frail if they met three or more of these criteria and prefrail if they met one or two criteria.

Adverse health outcomes were judged on the basis of instrumental or basic activities of daily living (IADL/ADL), while disability was judged by self-reported difficulties in or requiring assistance with at least one IADL or ADL.
 

Frail or prefrail

Almost half of the participants were frail or prefrail, as the authors reported, while 25% had COPD. Among the participants with COPD, 30% had moderate to severe COPD, 6.4% had dyspnea, and almost half had prefrailty, while approximately 7% were classified as frail.

This percentage was 86% higher than it was for participants without COPD, among whom just 3.2% were assessed as frail, at an odds ratio of 1.86 (95% CI, 1.35-2.56). Further adjustments for possible confounders reduced the gap between frail COPD and frail non-COPD participants, but frailty remained significantly associated with COPD, at an OR of 1.61 (95% CI, 1.15-2.26), the investigators note.

Furthermore, compared to those without COPD, a diagnosis of COPD without and with dyspnea was associated with a 1.5- and 4.2-fold increase in prevalent frailty (95% CI, 1.04-2.08; 1.84-9.19), respectively, although not with prefrailty. Again, adjusting for multiple confounders, FEV1%, dyspnea, and both prefrailty and frailty were associated with an approximately twofold higher prevalence of IADL/ADL disability, while the prevalence of IADL/ADL disability for participants with COPD was approximately fourfold higher in those with co-occurring FEV1% less than 80% with either prefrailty, frailty, or dyspnea.

Furthermore, the presence of prefrailty or frailty in combination with a lower FEV1% or dyspnea was associated with a 3.7- to 3.8-fold increased risk of having an IADL or ADL disability.
 

Frailty and mortality

Some 1,116 participants with COPD were followed for a mean of 2,981 days for mortality outcomes. Both FEV1% less than 50% and the presence of prefrailty and frailty almost doubled the risk of mortality, at an adjusted hazard ratio of 1.8 (95% CI, 1.24-2.68) compared to patients with an FEV1% greater than or equal to 80%. In combination with either FEV1% less than 80% or prefrailty/frailty, dyspnea almost more than doubled the risk of mortality, at an HR of 2.4 for both combinations.

“However, the mortality risk of participants with COPD was highest among those with FEV1% less than 80% and prefrailty/frailty,” the authors note, more than tripling mortality risk at an adjusted HR of 3.25 (95% CI, 1.97-5.36). Interestingly, FEV1 less than 80% and prefrailty/frailty – both alone and in combination – were also associated with a twofold to fourfold increased risk of IADL or ADL disability in participants without COPD but were less strongly associated with mortality.

Researchers then went on to create a summary risk score containing all relevant variables with values ranging from 0 to 5. The highest risk category of 3 to 5 was associated with a 7- to 8.5-fold increased risk for IADL and ADL disability and mortality among participants with COPD, and that risk remained high after adjusting for multiple confounders.

Interestingly, frailty did not significantly predict mortality in women, while dyspnea did not significantly predict mortality in men. “Recognition and assessment of physical frailty in addition to FEV1% and dyspnea would allow for more accurate identification and targeted treatment of COPD at risk of future adverse outcomes,” the authors suggest.
 

Frailty scoring system

Asked to comment on the study, Sachin Gupta, MD, a pulmonologist and critical care specialist at Alameda Health System in Oakland, Calif., noted that the current study adds to the body of literature that outcomes in patients with COPD depend as much on objectively measured variables as on qualitative measures. “By applying a frailty scoring system, these researchers were able to categorize frailty and study its impact on patient characteristics and outcomes,” he told this news organization in an email.

The summary risk assessment tool developed and assessed is familiar: It carries parallels to the widely utilized BODE Index, replacing body mass index and 6-minute walk distance with the frailty scale, he added. “Findings from this study support the idea that what meets the eye in face-to-face visits – frailty – can be codified and be part of a tool that is predictive of outcomes,” Dr. Gupta underscored.

The authors had no conflicts of interest to declare. Dr. Gupta disclosed that he is also an employee and shareholder at Genentech.

A version of this article first appeared on Medscape.com.

A low body mass index (BMI) indicative of being underweight as well as a weight loss of 2 kg or more over the course of 1 year were both independently associated with a higher mortality risk in the following year in patients with fibrotic interstitial lung disease (ILD). In contrast, being both overweight and obese appeared to be protective against mortality at the same 1-year endpoint, according to the results of an observational, retrospective cohort study.

Compared with patients with a normal BMI, patients who were underweight at a BMI of less than 18.5 kg/m² were over three times more likely to die at 1 year, at a hazard ratio of 3.19 (P < .001), senior author Christopher Ryerson, MD, University of British Columbia, Vancouver, and colleagues reported in the journal Chest.

In contrast, patients who were overweight with a BMI of 25-29 had roughly half the mortality risk as those who were underweight, at an HR of 0.52 (P < .001). Results were roughly similar among the patients with obesity with a BMI in excess of 30, among whom the HR for mortality at 1 year was 0.55 (P < .001), compared with those who were underweight.

“All patients with fibrotic ILD should still engage in exercise and eat an appropriate diet and it is still okay if you are obese and lose weight as a consequence of these lifestyle choices,” Dr. Ryerson told this news organization. “But physicians should be concerned about patients who have severe ILD and who start to lose weight unintentionally since this often represents end-stage fibrosis or some other major comorbidity such as cancer.”
 

Two large cohorts

Patients from two large cohorts, including the six-center Canadian Registry for Pulmonary Fibrosis (CARE-PF) and the ILD registry at the University of California, San Francisco, were enrolled in the study. A total of 1,786 patients were included from the CARE-PF registry, which served as the derivation cohort, while another 1,779 patients from the UCSF registry served as the validation cohort. In the CARE-PF cohort, 21% of all ILD patients experienced a weight loss of at least 1 kg in the first year of follow-up, including 31% of patients with idiopathic pulmonary fibrosis (IPF).

“Fewer patients experienced a weight loss of at least 1 kg during the first year of the study period in the UCSF cohort,” the authors noted, at only 12% of all ILD patients, some 14% of those with IPF losing at least 1 kg of weight over the course of the year. At 2 years’ follow-up, 35% of all ILD patients had lost at least 1 kg, as had 46% of all IPF patients. Looking at BMI, “a higher value was associated with decreased 1-year mortality in both cohorts on unadjusted analysis,” the investigators observed.

In the CARE-PF cohort, the HR for 1-year mortality was 0.96 per unit difference in BMI (P < .001), while in the UCSF cohort, the HR for 1-year mortality was exactly the same, at 0.96 per unit difference in BMI (P < .001). The authors then adjusted findings for the ILD-GAP index, which included gender, age, and physiology index. After adjusting for this index, the HR for 1-year mortality in the CARE-PF cohort was 0.93 per unit change in BMI (95% CI, 0.90-0.967; P < .001), while in the UCSF cohort, the HR was 0.96 per unit change in BMI (95% CI, 0.94-0.98; P = .001).

Indeed, each 1-kg change above a BMI of 30, adjusted for the ILD-GAP index, was associated with a reduced risk of mortality at 1 year in both cohorts, at an HR of 0.98 (P = .001) in the CARE-PF cohort and an HR of 0.98 (P < .001) in the UCSF cohort. In contrast, patients who experienced a BMI weight loss of 2 kg or more within 1 year had a 41% increased risk of death in the subsequent year after adjusting for the ILD-GAP index and baseline BMI category, at an HR of 1.41 (P = .04). “The absolute change in mortality is much smaller than this,” Dr. Ryerson acknowledged.

“However, the magnitude [in mortality risk] did impress us and this illustrates how weight loss is a frequent consequence of end-stage disease which is something that we have all observed clinically as well,” he added.

Mortality risk plateaued in patients with a greater weight loss, the investigators observed, and there was no association between weight and subsequent 1-year mortality in either cohort on unadjusted analysis.

On the other hand, being underweight was associated with between a 13% and 16% higher mortality risk at 1 year after adjusting for the ILD-GAP, at an HR of 0.84 per 10 kg (P = .001) in the CARE-PF cohort and an HR of 0.87 per 10 kg (P < .001) in the UCSF cohort. “Results were similar in the two studied cohorts, suggesting a robust and generalizable association of both low BMI and weight loss with mortality,” the authors emphasized.

“Together these studies highlight the potential link between obesity and ILD pathogenesis and further suggest the possibility that nutritional support may have a more specific and important role in the management of fibrotic ILD,” the authors wrote. Dr. Ryerson in turn noted that being able to determine mortality risk more accurately than current mortality risk prediction models are able to do is very helpful when dealing with what are sometimes life-and-death decisions.

He also said that having more insight into a patient’s prognosis can change how physicians manage patients with respect to either transplantation or palliation and potentially the need to be more aggressive with pharmacotherapy as well.
 

Addressing weight loss

Asked to comment on the findings, Elizabeth Volkmann, MD, associate professor of medicine, University of California, Los Angeles, said that this was a very important study and something that she feels does not get adequate attention in clinical practice.

“Weight loss and malnutrition occur in many patients with ILD due to various factors such as gastrointestinal side effects from antifibrotic therapies, decreased oral intake due to psychosocial issues including depression, and increased caloric requirements due to increased work of breathing,” she said in an interview. That said, weight loss and malnutrition are still often underaddressed during clinical encounters for patients with ILD where the focus is on lung health.

“This study illuminates the importance of addressing weight loss in all patients with ILD as it can contribute to heightened risk of mortality,” Dr. Volkmann reemphasized. Dr. Volkmann and colleagues themselves recently reported that radiographic progression of scleroderma lung disease over the course of 1-2 years is associated with an increased risk of long-term mortality, based on two independent studies of systemic sclerosis–interstitial lung disease with extensive follow-up.

Over 8 years of follow-up, patients in the Scleroderma Lung Study II who exhibited an increase of 2% or more in the QILD score – a score that reflects the sum of all abnormally classified scores, including those for fibrosis, ground glass opacity, and honeycombing – for the whole lung at 24 months had an almost fourfold increased risk in mortality, which was significant (P = .014).

The association of an increase in the QILD of at least 2% at 12 months was suggestive in its association with mortality in the SLS I cohort at 12 years of follow-up, a finding that suggests that radiographic progression measured at 2 years is a better predictor of long-term mortality than at 1 year, as the authors concluded.

The CARR-PF is funded by Boehringer Ingelheim. Dr. Ryerson reported receiving personal fees from Boehringer Ingelheim. Dr. Volkmann consults or has received speaker fees from Boehringer Ingelheim and has received grant support from Kadmon and Horizon Therapeutics.

A version of this article first appeared on Medscape.com.

A low body mass index (BMI) indicative of being underweight as well as a weight loss of 2 kg or more over the course of 1 year were both independently associated with a higher mortality risk in the following year in patients with fibrotic interstitial lung disease (ILD). In contrast, being both overweight and obese appeared to be protective against mortality at the same 1-year endpoint, according to the results of an observational, retrospective cohort study.

Compared with patients with a normal BMI, patients who were underweight at a BMI of less than 18.5 kg/m² were over three times more likely to die at 1 year, at a hazard ratio of 3.19 (P < .001), senior author Christopher Ryerson, MD, University of British Columbia, Vancouver, and colleagues reported in the journal Chest.

In contrast, patients who were overweight with a BMI of 25-29 had roughly half the mortality risk as those who were underweight, at an HR of 0.52 (P < .001). Results were roughly similar among the patients with obesity with a BMI in excess of 30, among whom the HR for mortality at 1 year was 0.55 (P < .001), compared with those who were underweight.

“All patients with fibrotic ILD should still engage in exercise and eat an appropriate diet and it is still okay if you are obese and lose weight as a consequence of these lifestyle choices,” Dr. Ryerson told this news organization. “But physicians should be concerned about patients who have severe ILD and who start to lose weight unintentionally since this often represents end-stage fibrosis or some other major comorbidity such as cancer.”
 

Two large cohorts

Patients from two large cohorts, including the six-center Canadian Registry for Pulmonary Fibrosis (CARE-PF) and the ILD registry at the University of California, San Francisco, were enrolled in the study. A total of 1,786 patients were included from the CARE-PF registry, which served as the derivation cohort, while another 1,779 patients from the UCSF registry served as the validation cohort. In the CARE-PF cohort, 21% of all ILD patients experienced a weight loss of at least 1 kg in the first year of follow-up, including 31% of patients with idiopathic pulmonary fibrosis (IPF).

“Fewer patients experienced a weight loss of at least 1 kg during the first year of the study period in the UCSF cohort,” the authors noted, at only 12% of all ILD patients, some 14% of those with IPF losing at least 1 kg of weight over the course of the year. At 2 years’ follow-up, 35% of all ILD patients had lost at least 1 kg, as had 46% of all IPF patients. Looking at BMI, “a higher value was associated with decreased 1-year mortality in both cohorts on unadjusted analysis,” the investigators observed.

In the CARE-PF cohort, the HR for 1-year mortality was 0.96 per unit difference in BMI (P < .001), while in the UCSF cohort, the HR for 1-year mortality was exactly the same, at 0.96 per unit difference in BMI (P < .001). The authors then adjusted findings for the ILD-GAP index, which included gender, age, and physiology index. After adjusting for this index, the HR for 1-year mortality in the CARE-PF cohort was 0.93 per unit change in BMI (95% CI, 0.90-0.967; P < .001), while in the UCSF cohort, the HR was 0.96 per unit change in BMI (95% CI, 0.94-0.98; P = .001).

Indeed, each 1-kg change above a BMI of 30, adjusted for the ILD-GAP index, was associated with a reduced risk of mortality at 1 year in both cohorts, at an HR of 0.98 (P = .001) in the CARE-PF cohort and an HR of 0.98 (P < .001) in the UCSF cohort. In contrast, patients who experienced a BMI weight loss of 2 kg or more within 1 year had a 41% increased risk of death in the subsequent year after adjusting for the ILD-GAP index and baseline BMI category, at an HR of 1.41 (P = .04). “The absolute change in mortality is much smaller than this,” Dr. Ryerson acknowledged.

“However, the magnitude [in mortality risk] did impress us and this illustrates how weight loss is a frequent consequence of end-stage disease which is something that we have all observed clinically as well,” he added.

Mortality risk plateaued in patients with a greater weight loss, the investigators observed, and there was no association between weight and subsequent 1-year mortality in either cohort on unadjusted analysis.

On the other hand, being underweight was associated with between a 13% and 16% higher mortality risk at 1 year after adjusting for the ILD-GAP, at an HR of 0.84 per 10 kg (P = .001) in the CARE-PF cohort and an HR of 0.87 per 10 kg (P < .001) in the UCSF cohort. “Results were similar in the two studied cohorts, suggesting a robust and generalizable association of both low BMI and weight loss with mortality,” the authors emphasized.

“Together these studies highlight the potential link between obesity and ILD pathogenesis and further suggest the possibility that nutritional support may have a more specific and important role in the management of fibrotic ILD,” the authors wrote. Dr. Ryerson in turn noted that being able to determine mortality risk more accurately than current mortality risk prediction models are able to do is very helpful when dealing with what are sometimes life-and-death decisions.

He also said that having more insight into a patient’s prognosis can change how physicians manage patients with respect to either transplantation or palliation and potentially the need to be more aggressive with pharmacotherapy as well.
 

Addressing weight loss

Asked to comment on the findings, Elizabeth Volkmann, MD, associate professor of medicine, University of California, Los Angeles, said that this was a very important study and something that she feels does not get adequate attention in clinical practice.

“Weight loss and malnutrition occur in many patients with ILD due to various factors such as gastrointestinal side effects from antifibrotic therapies, decreased oral intake due to psychosocial issues including depression, and increased caloric requirements due to increased work of breathing,” she said in an interview. That said, weight loss and malnutrition are still often underaddressed during clinical encounters for patients with ILD where the focus is on lung health.

“This study illuminates the importance of addressing weight loss in all patients with ILD as it can contribute to heightened risk of mortality,” Dr. Volkmann reemphasized. Dr. Volkmann and colleagues themselves recently reported that radiographic progression of scleroderma lung disease over the course of 1-2 years is associated with an increased risk of long-term mortality, based on two independent studies of systemic sclerosis–interstitial lung disease with extensive follow-up.

Over 8 years of follow-up, patients in the Scleroderma Lung Study II who exhibited an increase of 2% or more in the QILD score – a score that reflects the sum of all abnormally classified scores, including those for fibrosis, ground glass opacity, and honeycombing – for the whole lung at 24 months had an almost fourfold increased risk in mortality, which was significant (P = .014).

The association of an increase in the QILD of at least 2% at 12 months was suggestive in its association with mortality in the SLS I cohort at 12 years of follow-up, a finding that suggests that radiographic progression measured at 2 years is a better predictor of long-term mortality than at 1 year, as the authors concluded.

The CARR-PF is funded by Boehringer Ingelheim. Dr. Ryerson reported receiving personal fees from Boehringer Ingelheim. Dr. Volkmann consults or has received speaker fees from Boehringer Ingelheim and has received grant support from Kadmon and Horizon Therapeutics.

A version of this article first appeared on Medscape.com.

A low body mass index (BMI) indicative of being underweight as well as a weight loss of 2 kg or more over the course of 1 year were both independently associated with a higher mortality risk in the following year in patients with fibrotic interstitial lung disease (ILD). In contrast, being both overweight and obese appeared to be protective against mortality at the same 1-year endpoint, according to the results of an observational, retrospective cohort study.

Compared with patients with a normal BMI, patients who were underweight at a BMI of less than 18.5 kg/m² were over three times more likely to die at 1 year, at a hazard ratio of 3.19 (P < .001), senior author Christopher Ryerson, MD, University of British Columbia, Vancouver, and colleagues reported in the journal Chest.

In contrast, patients who were overweight with a BMI of 25-29 had roughly half the mortality risk as those who were underweight, at an HR of 0.52 (P < .001). Results were roughly similar among the patients with obesity with a BMI in excess of 30, among whom the HR for mortality at 1 year was 0.55 (P < .001), compared with those who were underweight.

“All patients with fibrotic ILD should still engage in exercise and eat an appropriate diet and it is still okay if you are obese and lose weight as a consequence of these lifestyle choices,” Dr. Ryerson told this news organization. “But physicians should be concerned about patients who have severe ILD and who start to lose weight unintentionally since this often represents end-stage fibrosis or some other major comorbidity such as cancer.”
 

Two large cohorts

Patients from two large cohorts, including the six-center Canadian Registry for Pulmonary Fibrosis (CARE-PF) and the ILD registry at the University of California, San Francisco, were enrolled in the study. A total of 1,786 patients were included from the CARE-PF registry, which served as the derivation cohort, while another 1,779 patients from the UCSF registry served as the validation cohort. In the CARE-PF cohort, 21% of all ILD patients experienced a weight loss of at least 1 kg in the first year of follow-up, including 31% of patients with idiopathic pulmonary fibrosis (IPF).

“Fewer patients experienced a weight loss of at least 1 kg during the first year of the study period in the UCSF cohort,” the authors noted, at only 12% of all ILD patients, some 14% of those with IPF losing at least 1 kg of weight over the course of the year. At 2 years’ follow-up, 35% of all ILD patients had lost at least 1 kg, as had 46% of all IPF patients. Looking at BMI, “a higher value was associated with decreased 1-year mortality in both cohorts on unadjusted analysis,” the investigators observed.

In the CARE-PF cohort, the HR for 1-year mortality was 0.96 per unit difference in BMI (P < .001), while in the UCSF cohort, the HR for 1-year mortality was exactly the same, at 0.96 per unit difference in BMI (P < .001). The authors then adjusted findings for the ILD-GAP index, which included gender, age, and physiology index. After adjusting for this index, the HR for 1-year mortality in the CARE-PF cohort was 0.93 per unit change in BMI (95% CI, 0.90-0.967; P < .001), while in the UCSF cohort, the HR was 0.96 per unit change in BMI (95% CI, 0.94-0.98; P = .001).

Indeed, each 1-kg change above a BMI of 30, adjusted for the ILD-GAP index, was associated with a reduced risk of mortality at 1 year in both cohorts, at an HR of 0.98 (P = .001) in the CARE-PF cohort and an HR of 0.98 (P < .001) in the UCSF cohort. In contrast, patients who experienced a BMI weight loss of 2 kg or more within 1 year had a 41% increased risk of death in the subsequent year after adjusting for the ILD-GAP index and baseline BMI category, at an HR of 1.41 (P = .04). “The absolute change in mortality is much smaller than this,” Dr. Ryerson acknowledged.

“However, the magnitude [in mortality risk] did impress us and this illustrates how weight loss is a frequent consequence of end-stage disease which is something that we have all observed clinically as well,” he added.

Mortality risk plateaued in patients with a greater weight loss, the investigators observed, and there was no association between weight and subsequent 1-year mortality in either cohort on unadjusted analysis.

On the other hand, being underweight was associated with between a 13% and 16% higher mortality risk at 1 year after adjusting for the ILD-GAP, at an HR of 0.84 per 10 kg (P = .001) in the CARE-PF cohort and an HR of 0.87 per 10 kg (P < .001) in the UCSF cohort. “Results were similar in the two studied cohorts, suggesting a robust and generalizable association of both low BMI and weight loss with mortality,” the authors emphasized.

“Together these studies highlight the potential link between obesity and ILD pathogenesis and further suggest the possibility that nutritional support may have a more specific and important role in the management of fibrotic ILD,” the authors wrote. Dr. Ryerson in turn noted that being able to determine mortality risk more accurately than current mortality risk prediction models are able to do is very helpful when dealing with what are sometimes life-and-death decisions.

He also said that having more insight into a patient’s prognosis can change how physicians manage patients with respect to either transplantation or palliation and potentially the need to be more aggressive with pharmacotherapy as well.
 

Addressing weight loss

Asked to comment on the findings, Elizabeth Volkmann, MD, associate professor of medicine, University of California, Los Angeles, said that this was a very important study and something that she feels does not get adequate attention in clinical practice.

“Weight loss and malnutrition occur in many patients with ILD due to various factors such as gastrointestinal side effects from antifibrotic therapies, decreased oral intake due to psychosocial issues including depression, and increased caloric requirements due to increased work of breathing,” she said in an interview. That said, weight loss and malnutrition are still often underaddressed during clinical encounters for patients with ILD where the focus is on lung health.

“This study illuminates the importance of addressing weight loss in all patients with ILD as it can contribute to heightened risk of mortality,” Dr. Volkmann reemphasized. Dr. Volkmann and colleagues themselves recently reported that radiographic progression of scleroderma lung disease over the course of 1-2 years is associated with an increased risk of long-term mortality, based on two independent studies of systemic sclerosis–interstitial lung disease with extensive follow-up.

Over 8 years of follow-up, patients in the Scleroderma Lung Study II who exhibited an increase of 2% or more in the QILD score – a score that reflects the sum of all abnormally classified scores, including those for fibrosis, ground glass opacity, and honeycombing – for the whole lung at 24 months had an almost fourfold increased risk in mortality, which was significant (P = .014).

The association of an increase in the QILD of at least 2% at 12 months was suggestive in its association with mortality in the SLS I cohort at 12 years of follow-up, a finding that suggests that radiographic progression measured at 2 years is a better predictor of long-term mortality than at 1 year, as the authors concluded.

The CARR-PF is funded by Boehringer Ingelheim. Dr. Ryerson reported receiving personal fees from Boehringer Ingelheim. Dr. Volkmann consults or has received speaker fees from Boehringer Ingelheim and has received grant support from Kadmon and Horizon Therapeutics.

A version of this article first appeared on Medscape.com.

The Food and Drug Administration on Jan. 3 authorized the first COVID-19 vaccine booster dose for American adolescents ages 12 to 15.

Besides updating the authorization for the Pfizer COVID-19 vaccine, the agency also shortened the recommended time between a second dose and the booster to 5 months or more, based on new evidence. In addition, a third primary series dose is now authorized for certain immunocompromised children 5 years to 11 years old. Full details are available in an FDA news release.

The amended emergency use authorization (EUA) only applies to the Pfizer vaccine, said acting FDA Commissioner Janet Woodcock, MD.

“Just to make sure every everyone is clear on this, right now: If you got [Johnson & Johnson’s one-dose vaccine], you get a booster after 2 months. If you got Moderna, you can get a booster at 6 months or beyond,” she said during a media briefing.

What is new, she said, is “if you got Pfizer as your primary series, you can get a booster at 5 months or beyond.”
 

A lower risk of myocarditis?

Asked about concerns about the risk of myocarditis with vaccination in the 12- to 15-year age group, Dr. Woodcock said they expect it would be “extremely rare with the third dose.”

“We have the real-world evidence from the Israeli experience to help us with that analysis,” she said.

The data so far consistently points to a higher risk of myocarditis after a second mRNA vaccine dose among males, from teenagers to 30-year-olds, with a peak at about 16 to 17 years of age, Peter Marks, MD, PhD, director of the FDA’s Center for Biologics Evaluation and Research, said during the media call.

The risk of myocarditis is about 2 to 3 times higher after a second vaccine dose, compared to a booster shot, Dr. Marks said, based on available data. It may be related to the closer dose timing of the second dose versus a third, he added.

“The inference here is that on the risk of myocarditis with third doses in the 12- to 15-year age range is likely to be quite acceptable,” he said.

Dr. Marks also pointed out that most cases of myocarditis clear up quickly.

“We’re not seeing long-lasting effects. That’s not to say that we don’t care about this and that it’s not important,” he said.

“But what it is saying is that in the setting of a tremendous number of Omicron and Delta cases in this country, the potential benefits of getting vaccinated in this age group outweigh that risk,” Dr. Marks said. “We can look at that risk-benefit and still feel comfortable.”

He said that “the really overwhelming majority of these cases, 98%, have been mild” -- shown by a 1-day median hospital stay.

Even so, the FDA plans to continue monitoring for the risk of myocarditis “very closely,” he said.

Interestingly, swollen underarm lymph nodes were seen more frequently after the booster dose than after the second dose of a two-dose primary series, the FDA said.

Reducing the time between primary vaccination with the Pfizer vaccine -- two initial doses -- and the booster shot from 6 months to 5 months is based on decreasing efficacy data that the drugmaker submitted to the FDA.

The 5-month interval was evaluated in a study from Israel published Dec. 21 in the New England Journal of Medicine .
 

Mixing and matching vaccines

Less clear at the moment is guidance about boosters for people who opted to mix and match their primary vaccine series.

“There was a mix-and-match study that was done which showed that in some cases, the mixing and matching … of an adenoviral record vaccine and an mRNA vaccine seem to give a very good immune response,” Dr. Marks said.

Once more data comes in on mixing and matching, “we’ll analyze them and then potentially make recommendations,” he said.
 

‘It’s not too late’

No federal government media briefing on COVID-19 would be complete without a plea for the unvaccinated to get immunized.

“We’re talking a lot about boosters right now, but it’s not too late for those who have not gotten a vaccine to get a vaccine,” Dr. Marks said, referring to the tens of millions of Americans who remain unvaccinated at the beginning of 2022.

“We know from our previous studies that even a single dose of the vaccine -- and probably two doses -- can help prevent the worst outcomes from COVID-19, including hospitalization and death.”

A version of this article first appeared on WebMD.com.

The Food and Drug Administration on Jan. 3 authorized the first COVID-19 vaccine booster dose for American adolescents ages 12 to 15.

Besides updating the authorization for the Pfizer COVID-19 vaccine, the agency also shortened the recommended time between a second dose and the booster to 5 months or more, based on new evidence. In addition, a third primary series dose is now authorized for certain immunocompromised children 5 years to 11 years old. Full details are available in an FDA news release.

The amended emergency use authorization (EUA) only applies to the Pfizer vaccine, said acting FDA Commissioner Janet Woodcock, MD.

“Just to make sure every everyone is clear on this, right now: If you got [Johnson & Johnson’s one-dose vaccine], you get a booster after 2 months. If you got Moderna, you can get a booster at 6 months or beyond,” she said during a media briefing.

What is new, she said, is “if you got Pfizer as your primary series, you can get a booster at 5 months or beyond.”
 

A lower risk of myocarditis?

Asked about concerns about the risk of myocarditis with vaccination in the 12- to 15-year age group, Dr. Woodcock said they expect it would be “extremely rare with the third dose.”

“We have the real-world evidence from the Israeli experience to help us with that analysis,” she said.

The data so far consistently points to a higher risk of myocarditis after a second mRNA vaccine dose among males, from teenagers to 30-year-olds, with a peak at about 16 to 17 years of age, Peter Marks, MD, PhD, director of the FDA’s Center for Biologics Evaluation and Research, said during the media call.

The risk of myocarditis is about 2 to 3 times higher after a second vaccine dose, compared to a booster shot, Dr. Marks said, based on available data. It may be related to the closer dose timing of the second dose versus a third, he added.

“The inference here is that on the risk of myocarditis with third doses in the 12- to 15-year age range is likely to be quite acceptable,” he said.

Dr. Marks also pointed out that most cases of myocarditis clear up quickly.

“We’re not seeing long-lasting effects. That’s not to say that we don’t care about this and that it’s not important,” he said.

“But what it is saying is that in the setting of a tremendous number of Omicron and Delta cases in this country, the potential benefits of getting vaccinated in this age group outweigh that risk,” Dr. Marks said. “We can look at that risk-benefit and still feel comfortable.”

He said that “the really overwhelming majority of these cases, 98%, have been mild” -- shown by a 1-day median hospital stay.

Even so, the FDA plans to continue monitoring for the risk of myocarditis “very closely,” he said.

Interestingly, swollen underarm lymph nodes were seen more frequently after the booster dose than after the second dose of a two-dose primary series, the FDA said.

Reducing the time between primary vaccination with the Pfizer vaccine -- two initial doses -- and the booster shot from 6 months to 5 months is based on decreasing efficacy data that the drugmaker submitted to the FDA.

The 5-month interval was evaluated in a study from Israel published Dec. 21 in the New England Journal of Medicine .
 

Mixing and matching vaccines

Less clear at the moment is guidance about boosters for people who opted to mix and match their primary vaccine series.

“There was a mix-and-match study that was done which showed that in some cases, the mixing and matching … of an adenoviral record vaccine and an mRNA vaccine seem to give a very good immune response,” Dr. Marks said.

Once more data comes in on mixing and matching, “we’ll analyze them and then potentially make recommendations,” he said.
 

‘It’s not too late’

No federal government media briefing on COVID-19 would be complete without a plea for the unvaccinated to get immunized.

“We’re talking a lot about boosters right now, but it’s not too late for those who have not gotten a vaccine to get a vaccine,” Dr. Marks said, referring to the tens of millions of Americans who remain unvaccinated at the beginning of 2022.

“We know from our previous studies that even a single dose of the vaccine -- and probably two doses -- can help prevent the worst outcomes from COVID-19, including hospitalization and death.”

A version of this article first appeared on WebMD.com.

The Food and Drug Administration on Jan. 3 authorized the first COVID-19 vaccine booster dose for American adolescents ages 12 to 15.

Besides updating the authorization for the Pfizer COVID-19 vaccine, the agency also shortened the recommended time between a second dose and the booster to 5 months or more, based on new evidence. In addition, a third primary series dose is now authorized for certain immunocompromised children 5 years to 11 years old. Full details are available in an FDA news release.

The amended emergency use authorization (EUA) only applies to the Pfizer vaccine, said acting FDA Commissioner Janet Woodcock, MD.

“Just to make sure every everyone is clear on this, right now: If you got [Johnson & Johnson’s one-dose vaccine], you get a booster after 2 months. If you got Moderna, you can get a booster at 6 months or beyond,” she said during a media briefing.

What is new, she said, is “if you got Pfizer as your primary series, you can get a booster at 5 months or beyond.”
 

A lower risk of myocarditis?

Asked about concerns about the risk of myocarditis with vaccination in the 12- to 15-year age group, Dr. Woodcock said they expect it would be “extremely rare with the third dose.”

“We have the real-world evidence from the Israeli experience to help us with that analysis,” she said.

The data so far consistently points to a higher risk of myocarditis after a second mRNA vaccine dose among males, from teenagers to 30-year-olds, with a peak at about 16 to 17 years of age, Peter Marks, MD, PhD, director of the FDA’s Center for Biologics Evaluation and Research, said during the media call.

The risk of myocarditis is about 2 to 3 times higher after a second vaccine dose, compared to a booster shot, Dr. Marks said, based on available data. It may be related to the closer dose timing of the second dose versus a third, he added.

“The inference here is that on the risk of myocarditis with third doses in the 12- to 15-year age range is likely to be quite acceptable,” he said.

Dr. Marks also pointed out that most cases of myocarditis clear up quickly.

“We’re not seeing long-lasting effects. That’s not to say that we don’t care about this and that it’s not important,” he said.

“But what it is saying is that in the setting of a tremendous number of Omicron and Delta cases in this country, the potential benefits of getting vaccinated in this age group outweigh that risk,” Dr. Marks said. “We can look at that risk-benefit and still feel comfortable.”

He said that “the really overwhelming majority of these cases, 98%, have been mild” -- shown by a 1-day median hospital stay.

Even so, the FDA plans to continue monitoring for the risk of myocarditis “very closely,” he said.

Interestingly, swollen underarm lymph nodes were seen more frequently after the booster dose than after the second dose of a two-dose primary series, the FDA said.

Reducing the time between primary vaccination with the Pfizer vaccine -- two initial doses -- and the booster shot from 6 months to 5 months is based on decreasing efficacy data that the drugmaker submitted to the FDA.

The 5-month interval was evaluated in a study from Israel published Dec. 21 in the New England Journal of Medicine .
 

Mixing and matching vaccines

Less clear at the moment is guidance about boosters for people who opted to mix and match their primary vaccine series.

“There was a mix-and-match study that was done which showed that in some cases, the mixing and matching … of an adenoviral record vaccine and an mRNA vaccine seem to give a very good immune response,” Dr. Marks said.

Once more data comes in on mixing and matching, “we’ll analyze them and then potentially make recommendations,” he said.
 

‘It’s not too late’

No federal government media briefing on COVID-19 would be complete without a plea for the unvaccinated to get immunized.

“We’re talking a lot about boosters right now, but it’s not too late for those who have not gotten a vaccine to get a vaccine,” Dr. Marks said, referring to the tens of millions of Americans who remain unvaccinated at the beginning of 2022.

“We know from our previous studies that even a single dose of the vaccine -- and probably two doses -- can help prevent the worst outcomes from COVID-19, including hospitalization and death.”

A version of this article first appeared on WebMD.com.

According to the Centers for Disease Control and Prevention, lung cancer is the third-most common cancer in the United States and the leading cause of cancer deaths in both men and women. Approximately, 150,000 Americans die every year from this disease.

For many years, no effective screening tests were available for lung cancer. This has changed with the advent of low-dose CT scanning as a screening method. In fact, it has been shown that low-dose CT scan screening can reduce lung cancer deaths by 20%-30% in high-risk populations.

In the United States, low-dose CT scan screening for lung cancer has largely become the norm. In July 2021, CHEST released new clinical guidelines. These guidelines cover 18 evidence-based recommendations as well as inclusion of further evidence regarding the benefits, risks, and use of CT screening.

In doing the risk assessment of low-dose CT scan as a method of lung cancer screening, meta-analyses were performed on evidence obtained through a literature search using PubMed, Embase, and the Cochrane Library. It was concluded that the benefits outweigh the risks as a method of lung cancer screening and can be utilized in reducing lung cancer deaths.

Low-dose CT scan screening was recommended for the following patients:

• Asymptomatic individuals aged 55-77 years with a history of smoking 30 or more pack-years. (This includes those who continue to smoke or who have quit in the previous 15 years. Annual screening is advised.)
• Asymptomatic individuals aged 55-80 years with a history of smoking 20-30 pack-years who either continue to smoke or have quit in the previous 15 years.
• For asymptomatic individuals who do not meet the above criteria but are predicted to benefit based on life-year gained calculations.

Don’t screen these patients

CT scan screening should not be performed on any person who does not meet any of the above three criteria.

Additionally, if a person has significant comorbidities that would limit their life expectancy, it is recommended not to do CT scan screening. Symptomatic patients should have appropriate diagnostic testing rather than screening.

Additional recommendations from the updated guidelines include developing appropriate counseling strategies as well as deciding what constitutes a positive test.

A positive test should be anything that warrants further evaluation rather than a return to annual screening. It was also advised that overtreatment strategies should be implemented. Additionally, smoking cessation treatment should be provided.

CHEST suggested undertaking a comprehensive approach involving multiple specialists including pulmonologists, radiologists, oncologists, etc. Strategies to ensure compliance with annual screening should also be devised, the guidelines say.
 

USPSTF’s updated guidelines

It should be noted that the U.S. Preventative Task Force released their own set of updated guidelines in March 2021. In these guidelines, the age at which lung cancer screening should be started was lowered from 55 years to 50 years.

Also, the USPSTF lowered the minimum required smoking history in order to be screened from 30 to 20 pack-years. Their purpose for doing this was to include more high-risk women as well as minorities.

With the changes, 14.5 million individuals living in the United States would be eligible for lung cancer screening by low-dose CT scan, an increase of 6.5 million people, compared with the previous guidelines.

While only small differences exist between the set of guidelines issued by CHEST and the ones issues by the USPSTF, lung cancer screening is still largely underutilized.

One of the barriers to screening may be patients’ lacking insurance coverage for it. As physicians, we need to advocate for these screening tools to be covered.

Other barriers include lack of patient knowledge regarding low-dose CT scans as a screening tool, patient time, and patient visits with their doctors being too short.
 

Key message

Part of the duties of physicians is to give our patients the best information. We can reduce lung cancer mortality in high risk patients by performing annual low-dose CT scans.

Whichever set of guidelines we chose to follow, we fail our patients if we don’t follow either set of them. The evidence is clear that a low-dose CT scan is a valuable screening tool to add to our practice of medicine.

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].

According to the Centers for Disease Control and Prevention, lung cancer is the third-most common cancer in the United States and the leading cause of cancer deaths in both men and women. Approximately, 150,000 Americans die every year from this disease.

For many years, no effective screening tests were available for lung cancer. This has changed with the advent of low-dose CT scanning as a screening method. In fact, it has been shown that low-dose CT scan screening can reduce lung cancer deaths by 20%-30% in high-risk populations.

In the United States, low-dose CT scan screening for lung cancer has largely become the norm. In July 2021, CHEST released new clinical guidelines. These guidelines cover 18 evidence-based recommendations as well as inclusion of further evidence regarding the benefits, risks, and use of CT screening.

In doing the risk assessment of low-dose CT scan as a method of lung cancer screening, meta-analyses were performed on evidence obtained through a literature search using PubMed, Embase, and the Cochrane Library. It was concluded that the benefits outweigh the risks as a method of lung cancer screening and can be utilized in reducing lung cancer deaths.

Low-dose CT scan screening was recommended for the following patients:

• Asymptomatic individuals aged 55-77 years with a history of smoking 30 or more pack-years. (This includes those who continue to smoke or who have quit in the previous 15 years. Annual screening is advised.)
• Asymptomatic individuals aged 55-80 years with a history of smoking 20-30 pack-years who either continue to smoke or have quit in the previous 15 years.
• For asymptomatic individuals who do not meet the above criteria but are predicted to benefit based on life-year gained calculations.

Don’t screen these patients

CT scan screening should not be performed on any person who does not meet any of the above three criteria.

Additionally, if a person has significant comorbidities that would limit their life expectancy, it is recommended not to do CT scan screening. Symptomatic patients should have appropriate diagnostic testing rather than screening.

Additional recommendations from the updated guidelines include developing appropriate counseling strategies as well as deciding what constitutes a positive test.

A positive test should be anything that warrants further evaluation rather than a return to annual screening. It was also advised that overtreatment strategies should be implemented. Additionally, smoking cessation treatment should be provided.

CHEST suggested undertaking a comprehensive approach involving multiple specialists including pulmonologists, radiologists, oncologists, etc. Strategies to ensure compliance with annual screening should also be devised, the guidelines say.
 

USPSTF’s updated guidelines

It should be noted that the U.S. Preventative Task Force released their own set of updated guidelines in March 2021. In these guidelines, the age at which lung cancer screening should be started was lowered from 55 years to 50 years.

Also, the USPSTF lowered the minimum required smoking history in order to be screened from 30 to 20 pack-years. Their purpose for doing this was to include more high-risk women as well as minorities.

With the changes, 14.5 million individuals living in the United States would be eligible for lung cancer screening by low-dose CT scan, an increase of 6.5 million people, compared with the previous guidelines.

While only small differences exist between the set of guidelines issued by CHEST and the ones issues by the USPSTF, lung cancer screening is still largely underutilized.

One of the barriers to screening may be patients’ lacking insurance coverage for it. As physicians, we need to advocate for these screening tools to be covered.

Other barriers include lack of patient knowledge regarding low-dose CT scans as a screening tool, patient time, and patient visits with their doctors being too short.
 

Key message

Part of the duties of physicians is to give our patients the best information. We can reduce lung cancer mortality in high risk patients by performing annual low-dose CT scans.

Whichever set of guidelines we chose to follow, we fail our patients if we don’t follow either set of them. The evidence is clear that a low-dose CT scan is a valuable screening tool to add to our practice of medicine.

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].

According to the Centers for Disease Control and Prevention, lung cancer is the third-most common cancer in the United States and the leading cause of cancer deaths in both men and women. Approximately, 150,000 Americans die every year from this disease.

For many years, no effective screening tests were available for lung cancer. This has changed with the advent of low-dose CT scanning as a screening method. In fact, it has been shown that low-dose CT scan screening can reduce lung cancer deaths by 20%-30% in high-risk populations.

In the United States, low-dose CT scan screening for lung cancer has largely become the norm. In July 2021, CHEST released new clinical guidelines. These guidelines cover 18 evidence-based recommendations as well as inclusion of further evidence regarding the benefits, risks, and use of CT screening.

In doing the risk assessment of low-dose CT scan as a method of lung cancer screening, meta-analyses were performed on evidence obtained through a literature search using PubMed, Embase, and the Cochrane Library. It was concluded that the benefits outweigh the risks as a method of lung cancer screening and can be utilized in reducing lung cancer deaths.

Low-dose CT scan screening was recommended for the following patients:

• Asymptomatic individuals aged 55-77 years with a history of smoking 30 or more pack-years. (This includes those who continue to smoke or who have quit in the previous 15 years. Annual screening is advised.)
• Asymptomatic individuals aged 55-80 years with a history of smoking 20-30 pack-years who either continue to smoke or have quit in the previous 15 years.
• For asymptomatic individuals who do not meet the above criteria but are predicted to benefit based on life-year gained calculations.

Don’t screen these patients

CT scan screening should not be performed on any person who does not meet any of the above three criteria.

Additionally, if a person has significant comorbidities that would limit their life expectancy, it is recommended not to do CT scan screening. Symptomatic patients should have appropriate diagnostic testing rather than screening.

Additional recommendations from the updated guidelines include developing appropriate counseling strategies as well as deciding what constitutes a positive test.

A positive test should be anything that warrants further evaluation rather than a return to annual screening. It was also advised that overtreatment strategies should be implemented. Additionally, smoking cessation treatment should be provided.

CHEST suggested undertaking a comprehensive approach involving multiple specialists including pulmonologists, radiologists, oncologists, etc. Strategies to ensure compliance with annual screening should also be devised, the guidelines say.
 

USPSTF’s updated guidelines

It should be noted that the U.S. Preventative Task Force released their own set of updated guidelines in March 2021. In these guidelines, the age at which lung cancer screening should be started was lowered from 55 years to 50 years.

Also, the USPSTF lowered the minimum required smoking history in order to be screened from 30 to 20 pack-years. Their purpose for doing this was to include more high-risk women as well as minorities.

With the changes, 14.5 million individuals living in the United States would be eligible for lung cancer screening by low-dose CT scan, an increase of 6.5 million people, compared with the previous guidelines.

While only small differences exist between the set of guidelines issued by CHEST and the ones issues by the USPSTF, lung cancer screening is still largely underutilized.

One of the barriers to screening may be patients’ lacking insurance coverage for it. As physicians, we need to advocate for these screening tools to be covered.

Other barriers include lack of patient knowledge regarding low-dose CT scans as a screening tool, patient time, and patient visits with their doctors being too short.
 

Key message

Part of the duties of physicians is to give our patients the best information. We can reduce lung cancer mortality in high risk patients by performing annual low-dose CT scans.

Whichever set of guidelines we chose to follow, we fail our patients if we don’t follow either set of them. The evidence is clear that a low-dose CT scan is a valuable screening tool to add to our practice of medicine.

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 Food and Drug Administration has granted emergency use authorization to Merck’s antiviral drug to treat adults with mild to moderate COVID-19 who are at risk for severe disease.

Similar to FDA authorization of another antiviral pill regimen – ritonavir plus nirmatrelvir, or Paxlovid – granted to Pfizer on Wednesday, molnupiravir (brand name Lagevrio) should be taken early in the course of COVID-19 illness.

Pfizer’s drug is authorized for anyone aged 12 and up. But Merck’s is only for adults aged 18 and older.

Merck filed an application for emergency use authorization with the FDA in October. The company included results of its phase 3 study showing the treatment could lead to a 50% reduction in COVID-19 hospitalizations. Data later showed this efficacy at closer to a 30% reduction. In November, an FDA advisory panel narrowly recommended the agency grant authorization by a 13-10 vote.

Animal studies found the drug may harm a fetus, so it is not recommended for pregnant people, the FDA says. It may be prescribed to a pregnant person only after their doctor determines the benefits outweigh the risks and the patient is told of those risks.

Women who may get pregnant should use a reliable method of birth control if being treated with molnupiravir and for 4 days after the final dose.

Two weapons against COVID

Two antiviral pills could be better than one, at least in terms of making more COVID-19 treatments available in early 2022. It is yet to be seen if the drugmakers will be able to keep up with demand, which could substantially increase with an expected surge in Omicron variant cases.

Ritonavir and molnupiravir join remdesivir (brand name Veklury) as available antivirals to treat COVID-19. Remdesivir is fully approved by the FDA but is given only through an IV to people in the hospital.

Officials point out that COVID-19 treatments in tablet form are more convenient for patients in the United States and across the globe, particularly where IV infusion services may be limited.

In March 2021, experts accurately predicted that the molnupiravir pill would be available by year’s end.

Interestingly, in September, Merck announced the findings of laboratory studies suggesting that molnupiravir would work against variants of SARS-CoV-2 because the agent does not target the virus’s spike protein.

Perhaps in part because of early promising results, the U.S. government announced in November intentions to purchase $1 billion worth of molnupiravir. That new order came on top of $1.2 billion worth of the pills the U.S. ordered in June.

A version of this article first appeared on WebMD.com.

The Food and Drug Administration has granted emergency use authorization to Merck’s antiviral drug to treat adults with mild to moderate COVID-19 who are at risk for severe disease.

Similar to FDA authorization of another antiviral pill regimen – ritonavir plus nirmatrelvir, or Paxlovid – granted to Pfizer on Wednesday, molnupiravir (brand name Lagevrio) should be taken early in the course of COVID-19 illness.

Pfizer’s drug is authorized for anyone aged 12 and up. But Merck’s is only for adults aged 18 and older.

Merck filed an application for emergency use authorization with the FDA in October. The company included results of its phase 3 study showing the treatment could lead to a 50% reduction in COVID-19 hospitalizations. Data later showed this efficacy at closer to a 30% reduction. In November, an FDA advisory panel narrowly recommended the agency grant authorization by a 13-10 vote.

Animal studies found the drug may harm a fetus, so it is not recommended for pregnant people, the FDA says. It may be prescribed to a pregnant person only after their doctor determines the benefits outweigh the risks and the patient is told of those risks.

Women who may get pregnant should use a reliable method of birth control if being treated with molnupiravir and for 4 days after the final dose.

Two weapons against COVID

Two antiviral pills could be better than one, at least in terms of making more COVID-19 treatments available in early 2022. It is yet to be seen if the drugmakers will be able to keep up with demand, which could substantially increase with an expected surge in Omicron variant cases.

Ritonavir and molnupiravir join remdesivir (brand name Veklury) as available antivirals to treat COVID-19. Remdesivir is fully approved by the FDA but is given only through an IV to people in the hospital.

Officials point out that COVID-19 treatments in tablet form are more convenient for patients in the United States and across the globe, particularly where IV infusion services may be limited.

In March 2021, experts accurately predicted that the molnupiravir pill would be available by year’s end.

Interestingly, in September, Merck announced the findings of laboratory studies suggesting that molnupiravir would work against variants of SARS-CoV-2 because the agent does not target the virus’s spike protein.

Perhaps in part because of early promising results, the U.S. government announced in November intentions to purchase $1 billion worth of molnupiravir. That new order came on top of $1.2 billion worth of the pills the U.S. ordered in June.

A version of this article first appeared on WebMD.com.

The Food and Drug Administration has granted emergency use authorization to Merck’s antiviral drug to treat adults with mild to moderate COVID-19 who are at risk for severe disease.

Similar to FDA authorization of another antiviral pill regimen – ritonavir plus nirmatrelvir, or Paxlovid – granted to Pfizer on Wednesday, molnupiravir (brand name Lagevrio) should be taken early in the course of COVID-19 illness.

Pfizer’s drug is authorized for anyone aged 12 and up. But Merck’s is only for adults aged 18 and older.

Merck filed an application for emergency use authorization with the FDA in October. The company included results of its phase 3 study showing the treatment could lead to a 50% reduction in COVID-19 hospitalizations. Data later showed this efficacy at closer to a 30% reduction. In November, an FDA advisory panel narrowly recommended the agency grant authorization by a 13-10 vote.

Animal studies found the drug may harm a fetus, so it is not recommended for pregnant people, the FDA says. It may be prescribed to a pregnant person only after their doctor determines the benefits outweigh the risks and the patient is told of those risks.

Women who may get pregnant should use a reliable method of birth control if being treated with molnupiravir and for 4 days after the final dose.

Two weapons against COVID

Two antiviral pills could be better than one, at least in terms of making more COVID-19 treatments available in early 2022. It is yet to be seen if the drugmakers will be able to keep up with demand, which could substantially increase with an expected surge in Omicron variant cases.

Ritonavir and molnupiravir join remdesivir (brand name Veklury) as available antivirals to treat COVID-19. Remdesivir is fully approved by the FDA but is given only through an IV to people in the hospital.

Officials point out that COVID-19 treatments in tablet form are more convenient for patients in the United States and across the globe, particularly where IV infusion services may be limited.

In March 2021, experts accurately predicted that the molnupiravir pill would be available by year’s end.

Interestingly, in September, Merck announced the findings of laboratory studies suggesting that molnupiravir would work against variants of SARS-CoV-2 because the agent does not target the virus’s spike protein.

Perhaps in part because of early promising results, the U.S. government announced in November intentions to purchase $1 billion worth of molnupiravir. That new order came on top of $1.2 billion worth of the pills the U.S. ordered in June.

A version of this article first appeared on WebMD.com.

The impact of respiratory syncytial virus (RSV)will likely be greater in 2021 and 2022 in the United States than in previous years as a result of the ongoing COVID-19 pandemic, based on data from a simulation-modeling study involving approximately 19 million individuals.

Although RSV usually follows consistent patterns of timing and duration, the disease all but disappeared starting in March 2020 after the introduction of measures to mitigate the spread of COVID-19, Zhe Zheng, MBBS, of Yale University, New Haven, Conn., and colleagues wrote.

However, lifting of mitigation measures has resulted in emergence of RSV in various parts of the world in early 2021, and trends may be similar in the United States, but data are needed to plan for prophylaxis and hospital use, they noted.

In a study published in JAMA Network Open, the researchers developed a simulation model for epidemics of RSV based on historical data. They acquired inpatient records from New York during 2005-2014 and from California during 2003-2011. The primary clinical outcome was the estimated monthly hospitalizations for RSV.

The simulated study population was 19.45 million individuals. After evaluating several scenarios including continued low transmission associated with social distancing and other mitigation measures, the researchers focused on the likely scenario that introduction of RSV from other regions would likely spark RSV epidemics in the United States.

They determined that spring and summer 2021 would show an increase in hospitalizations for RSV. Overall, higher rates of virus introduction from other regions were associated with more intense spring and summer RSV epidemics, with the trade-off of smaller winter epidemics. In the model, the expected RSV epidemic in spring and summer 2021 in New York was small, with a peak incidence of 419 hospitalizations per 100,000 people in April; by contrast, for states with less seasonal variability, such as Florida, the model predicted a larger summer epidemic.

In the model, the mean age of hospitalization for children younger than 5 years for January 2022 was expected to be 1.17 years, compared with 0.84 years in January 2019, the researchers noted.

Across all age groups, the greatest relative increase in the incidence of RSV infection was predicted for children aged 1-4 years (ranging from 82% to 86%), as were lower respiratory infections (87%-101%) and hospitalization (99%-119%), compared with prepandemic levels.

Hospitalizations for children aged 1 year were predicted to double compared with prepandemic seasons; 707 per 100,000 children per year for 2021 and 2022 versus 355 per 100,000 children per year in a typical prepandemic season. However, the largest incidence of lower respiratory infections (30,075 per 100,000) was predicted for infants aged 3-5 months, and the largest incidence of hospitalizations (3,116 per 100,000) was predicted for infants younger than 3 months.

“Without virus importation, the risk of RSV infections across all age groups in the winter of 2021 and 2022 would be greater, as more susceptible individuals were spared from infections in the absence of summer epidemics,” the researchers noted.

The older mean hospitalization age seen in the model was similar to the reported median patient age in Australia both before the pandemic and during the reemergent RSV epidemic.

“This makes intuitive sense, since many children born in 2020 were spared from RSV infection due to the low virus activity; these children will be older when they get infected for the first time during the reemergent epidemics,” the researchers wrote. “Consequently, stakeholders should consider modifying prophylaxis guidelines to include high-risk infants less than 2 years of age for the 2021-2022 season.”

The study findings were limited by several factors including the lack of data on level of virus introduction or on the impact of lack of boosting on infants with only transplacentally acquired RSV antibodies, the researchers noted. Other limitations include the use of historical data and the lack of data on values outside those included in the model, as well as the inability to control for other factors that could influence RSV, such as vaccines or long-lasting antibodies.

However, the results suggest that the rate of imported infections is associated with RSV hospitalizations, and the model effectively captured the RSV epidemics in the United States in spring and summer 2021.

Models can guide clinical preparations

“Health care simulation modeling is a growing field, with very exciting implications,” Lenore Jarvis, MD, of George Washington University, Washington, said in an interview. The field has the potential ability to influence health care in a data-driven way, including, but not limited to, staffing and other hospital operations, as well as patient care decision-making. “In short, accurate modeling and predictions can help us to make informed health care decisions that can lead to increased quality of care, potential cost savings, and even to help save lives,” she said.

Although the details of transmission modeling were not mentioned in the study, the authors evaluated the performances of several models and scenarios. “Scenario 4, for example, was focused on in particular because it best captured the observed dynamics [for RSV] that emerged during the spring and summer of 2021,” Dr. Jarvis said.

“Pediatricians can speak to these trends firsthand. A decrease in expected RSV infections and hospitalizations in 2020, followed by an unprecedented and early increase in RSV infections and severity in 2021, and the factors that the authors account for make sense, such as reintroduction of RSV from other regions and low immunity in the population,” she said. “It also makes sense that, in these transmission modeling scenarios, the expected mean age of hospitalization because of RSV increased with a temporary (hopefully) increase in RSV hospitalizations in the 2021 season, and potentially the 2022 RSV season.”

As for additional research, Dr. Jarvis said she would like to see follow-up data on the RSV transmission modeling. “For example, with scenario 4, does this scenario continue to perform well in other time periods, such as the winter? If the modeling continues to be accurate during other periods of evaluation and reevaluation, this modeling could be very useful in helping pediatric clinics and hospitals to prepare for RSV care and hospital capacity management.”

The study was supported by grants to various researchers from the National Institute of Allergy and Infectious Diseases/National Institutes of Health, the National Center for Advancing Translational Science at the National Institutes of Health, and NIH Roadmap for Medical Research. Lead author Ms. Zheng had no financial conflicts to disclose. Her study coauthors disclosed relationships with companies including AbbVie, Merck, Pfizer, GlaxoSmithKline, MedImmune, and Janssen. Dr. Jarvis had no financial conflicts to disclose and serves on the Pediatric News editorial advisory board.

The impact of respiratory syncytial virus (RSV)will likely be greater in 2021 and 2022 in the United States than in previous years as a result of the ongoing COVID-19 pandemic, based on data from a simulation-modeling study involving approximately 19 million individuals.

Although RSV usually follows consistent patterns of timing and duration, the disease all but disappeared starting in March 2020 after the introduction of measures to mitigate the spread of COVID-19, Zhe Zheng, MBBS, of Yale University, New Haven, Conn., and colleagues wrote.

However, lifting of mitigation measures has resulted in emergence of RSV in various parts of the world in early 2021, and trends may be similar in the United States, but data are needed to plan for prophylaxis and hospital use, they noted.

In a study published in JAMA Network Open, the researchers developed a simulation model for epidemics of RSV based on historical data. They acquired inpatient records from New York during 2005-2014 and from California during 2003-2011. The primary clinical outcome was the estimated monthly hospitalizations for RSV.

The simulated study population was 19.45 million individuals. After evaluating several scenarios including continued low transmission associated with social distancing and other mitigation measures, the researchers focused on the likely scenario that introduction of RSV from other regions would likely spark RSV epidemics in the United States.

They determined that spring and summer 2021 would show an increase in hospitalizations for RSV. Overall, higher rates of virus introduction from other regions were associated with more intense spring and summer RSV epidemics, with the trade-off of smaller winter epidemics. In the model, the expected RSV epidemic in spring and summer 2021 in New York was small, with a peak incidence of 419 hospitalizations per 100,000 people in April; by contrast, for states with less seasonal variability, such as Florida, the model predicted a larger summer epidemic.

In the model, the mean age of hospitalization for children younger than 5 years for January 2022 was expected to be 1.17 years, compared with 0.84 years in January 2019, the researchers noted.

Across all age groups, the greatest relative increase in the incidence of RSV infection was predicted for children aged 1-4 years (ranging from 82% to 86%), as were lower respiratory infections (87%-101%) and hospitalization (99%-119%), compared with prepandemic levels.

Hospitalizations for children aged 1 year were predicted to double compared with prepandemic seasons; 707 per 100,000 children per year for 2021 and 2022 versus 355 per 100,000 children per year in a typical prepandemic season. However, the largest incidence of lower respiratory infections (30,075 per 100,000) was predicted for infants aged 3-5 months, and the largest incidence of hospitalizations (3,116 per 100,000) was predicted for infants younger than 3 months.

“Without virus importation, the risk of RSV infections across all age groups in the winter of 2021 and 2022 would be greater, as more susceptible individuals were spared from infections in the absence of summer epidemics,” the researchers noted.

The older mean hospitalization age seen in the model was similar to the reported median patient age in Australia both before the pandemic and during the reemergent RSV epidemic.

“This makes intuitive sense, since many children born in 2020 were spared from RSV infection due to the low virus activity; these children will be older when they get infected for the first time during the reemergent epidemics,” the researchers wrote. “Consequently, stakeholders should consider modifying prophylaxis guidelines to include high-risk infants less than 2 years of age for the 2021-2022 season.”

The study findings were limited by several factors including the lack of data on level of virus introduction or on the impact of lack of boosting on infants with only transplacentally acquired RSV antibodies, the researchers noted. Other limitations include the use of historical data and the lack of data on values outside those included in the model, as well as the inability to control for other factors that could influence RSV, such as vaccines or long-lasting antibodies.

However, the results suggest that the rate of imported infections is associated with RSV hospitalizations, and the model effectively captured the RSV epidemics in the United States in spring and summer 2021.

Models can guide clinical preparations

“Health care simulation modeling is a growing field, with very exciting implications,” Lenore Jarvis, MD, of George Washington University, Washington, said in an interview. The field has the potential ability to influence health care in a data-driven way, including, but not limited to, staffing and other hospital operations, as well as patient care decision-making. “In short, accurate modeling and predictions can help us to make informed health care decisions that can lead to increased quality of care, potential cost savings, and even to help save lives,” she said.

Although the details of transmission modeling were not mentioned in the study, the authors evaluated the performances of several models and scenarios. “Scenario 4, for example, was focused on in particular because it best captured the observed dynamics [for RSV] that emerged during the spring and summer of 2021,” Dr. Jarvis said.

“Pediatricians can speak to these trends firsthand. A decrease in expected RSV infections and hospitalizations in 2020, followed by an unprecedented and early increase in RSV infections and severity in 2021, and the factors that the authors account for make sense, such as reintroduction of RSV from other regions and low immunity in the population,” she said. “It also makes sense that, in these transmission modeling scenarios, the expected mean age of hospitalization because of RSV increased with a temporary (hopefully) increase in RSV hospitalizations in the 2021 season, and potentially the 2022 RSV season.”

As for additional research, Dr. Jarvis said she would like to see follow-up data on the RSV transmission modeling. “For example, with scenario 4, does this scenario continue to perform well in other time periods, such as the winter? If the modeling continues to be accurate during other periods of evaluation and reevaluation, this modeling could be very useful in helping pediatric clinics and hospitals to prepare for RSV care and hospital capacity management.”

The study was supported by grants to various researchers from the National Institute of Allergy and Infectious Diseases/National Institutes of Health, the National Center for Advancing Translational Science at the National Institutes of Health, and NIH Roadmap for Medical Research. Lead author Ms. Zheng had no financial conflicts to disclose. Her study coauthors disclosed relationships with companies including AbbVie, Merck, Pfizer, GlaxoSmithKline, MedImmune, and Janssen. Dr. Jarvis had no financial conflicts to disclose and serves on the Pediatric News editorial advisory board.

The impact of respiratory syncytial virus (RSV)will likely be greater in 2021 and 2022 in the United States than in previous years as a result of the ongoing COVID-19 pandemic, based on data from a simulation-modeling study involving approximately 19 million individuals.

Although RSV usually follows consistent patterns of timing and duration, the disease all but disappeared starting in March 2020 after the introduction of measures to mitigate the spread of COVID-19, Zhe Zheng, MBBS, of Yale University, New Haven, Conn., and colleagues wrote.

However, lifting of mitigation measures has resulted in emergence of RSV in various parts of the world in early 2021, and trends may be similar in the United States, but data are needed to plan for prophylaxis and hospital use, they noted.

In a study published in JAMA Network Open, the researchers developed a simulation model for epidemics of RSV based on historical data. They acquired inpatient records from New York during 2005-2014 and from California during 2003-2011. The primary clinical outcome was the estimated monthly hospitalizations for RSV.

The simulated study population was 19.45 million individuals. After evaluating several scenarios including continued low transmission associated with social distancing and other mitigation measures, the researchers focused on the likely scenario that introduction of RSV from other regions would likely spark RSV epidemics in the United States.

They determined that spring and summer 2021 would show an increase in hospitalizations for RSV. Overall, higher rates of virus introduction from other regions were associated with more intense spring and summer RSV epidemics, with the trade-off of smaller winter epidemics. In the model, the expected RSV epidemic in spring and summer 2021 in New York was small, with a peak incidence of 419 hospitalizations per 100,000 people in April; by contrast, for states with less seasonal variability, such as Florida, the model predicted a larger summer epidemic.

In the model, the mean age of hospitalization for children younger than 5 years for January 2022 was expected to be 1.17 years, compared with 0.84 years in January 2019, the researchers noted.

Across all age groups, the greatest relative increase in the incidence of RSV infection was predicted for children aged 1-4 years (ranging from 82% to 86%), as were lower respiratory infections (87%-101%) and hospitalization (99%-119%), compared with prepandemic levels.

Hospitalizations for children aged 1 year were predicted to double compared with prepandemic seasons; 707 per 100,000 children per year for 2021 and 2022 versus 355 per 100,000 children per year in a typical prepandemic season. However, the largest incidence of lower respiratory infections (30,075 per 100,000) was predicted for infants aged 3-5 months, and the largest incidence of hospitalizations (3,116 per 100,000) was predicted for infants younger than 3 months.

“Without virus importation, the risk of RSV infections across all age groups in the winter of 2021 and 2022 would be greater, as more susceptible individuals were spared from infections in the absence of summer epidemics,” the researchers noted.

The older mean hospitalization age seen in the model was similar to the reported median patient age in Australia both before the pandemic and during the reemergent RSV epidemic.

“This makes intuitive sense, since many children born in 2020 were spared from RSV infection due to the low virus activity; these children will be older when they get infected for the first time during the reemergent epidemics,” the researchers wrote. “Consequently, stakeholders should consider modifying prophylaxis guidelines to include high-risk infants less than 2 years of age for the 2021-2022 season.”

The study findings were limited by several factors including the lack of data on level of virus introduction or on the impact of lack of boosting on infants with only transplacentally acquired RSV antibodies, the researchers noted. Other limitations include the use of historical data and the lack of data on values outside those included in the model, as well as the inability to control for other factors that could influence RSV, such as vaccines or long-lasting antibodies.

However, the results suggest that the rate of imported infections is associated with RSV hospitalizations, and the model effectively captured the RSV epidemics in the United States in spring and summer 2021.

Models can guide clinical preparations

“Health care simulation modeling is a growing field, with very exciting implications,” Lenore Jarvis, MD, of George Washington University, Washington, said in an interview. The field has the potential ability to influence health care in a data-driven way, including, but not limited to, staffing and other hospital operations, as well as patient care decision-making. “In short, accurate modeling and predictions can help us to make informed health care decisions that can lead to increased quality of care, potential cost savings, and even to help save lives,” she said.

Although the details of transmission modeling were not mentioned in the study, the authors evaluated the performances of several models and scenarios. “Scenario 4, for example, was focused on in particular because it best captured the observed dynamics [for RSV] that emerged during the spring and summer of 2021,” Dr. Jarvis said.

“Pediatricians can speak to these trends firsthand. A decrease in expected RSV infections and hospitalizations in 2020, followed by an unprecedented and early increase in RSV infections and severity in 2021, and the factors that the authors account for make sense, such as reintroduction of RSV from other regions and low immunity in the population,” she said. “It also makes sense that, in these transmission modeling scenarios, the expected mean age of hospitalization because of RSV increased with a temporary (hopefully) increase in RSV hospitalizations in the 2021 season, and potentially the 2022 RSV season.”

As for additional research, Dr. Jarvis said she would like to see follow-up data on the RSV transmission modeling. “For example, with scenario 4, does this scenario continue to perform well in other time periods, such as the winter? If the modeling continues to be accurate during other periods of evaluation and reevaluation, this modeling could be very useful in helping pediatric clinics and hospitals to prepare for RSV care and hospital capacity management.”

The study was supported by grants to various researchers from the National Institute of Allergy and Infectious Diseases/National Institutes of Health, the National Center for Advancing Translational Science at the National Institutes of Health, and NIH Roadmap for Medical Research. Lead author Ms. Zheng had no financial conflicts to disclose. Her study coauthors disclosed relationships with companies including AbbVie, Merck, Pfizer, GlaxoSmithKline, MedImmune, and Janssen. Dr. Jarvis had no financial conflicts to disclose and serves on the Pediatric News editorial advisory board.