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Schizophrenia risk lower for people with access to green space
The investigators, led by Martin Rotenberg, MD, of Centre for Addiction and Mental Health and the University of Toronto, found individuals living in areas with the lowest levels of green space were 24% more likely to develop schizophrenia.
This study contributes to a growing body of evidence showing the importance of exposure to green space to mental health.
“These findings contribute to a growing evidence base that environmental factors may play a role in the etiology of schizophrenia,” the researchers write.
The study was published online Feb. 4 in the Canadian Journal of Psychiatry.
Underlying mechanism unknown
For the study, researchers used a retrospective population-based cohort of 649,020 individuals between ages 14 and 40 years from different neighborhoods in Toronto.
Green space was calculated using geospatial data of all public parks and green spaces in the city; data were drawn from the Urban Health Equity Assessment and Response Tool.
Over a 10-year period, 4,841 participants were diagnosed with schizophrenia.
Those who lived in neighborhoods with the least amount of green space were significantly more likely to develop schizophrenia than those who lived in areas with the most green space, even after adjusting for age, sex, and neighborhood-level marginalization (adjusted incidence rate ratio, 1.24; 95% confidence interval, 1.06-1.45).
Overall, schizophrenia risk was also elevated in men vs. women (adjusted IRR, 1.59; 95% CI, 1.50-1.68). Those living in areas with moderate amounts of green space did not have an increased schizophrenia risk.
“We found that residing in an area with the lowest amount of green space was associated with an increased risk of developing schizophrenia, independent of other sociodemographic and socioenvironmental factors,” the researchers note. “The underlying mechanism at play is unknown and requires further study.”
One possibility, they added, is that exposure to green space may reduce the risk of air pollution, which other studies have suggested may be associated with increased schizophrenia risk.
The new study builds on a 2018 report from Denmark that showed a 52% increased risk of psychotic disorders in adulthood among people who spent their childhood in neighborhoods with little green space.
Important, longitudinal data
Commenting on the findings, John Torous, MD, director of digital psychiatry at Beth Israel Deaconess Medical Center, Boston, said the study provides important longitudinal data.
“The 10-year duration of the study and large sample size make the results very compelling and help confirm what has been thought about green space and risk of schizophrenia,” Dr. Torous said.
“Often, we think of green space at a very macro level,” he added. “This study is important because it shows us that green space matters on a block-by-block level just as much.”
The study was unfunded. The authors and Dr. Torous have disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
The investigators, led by Martin Rotenberg, MD, of Centre for Addiction and Mental Health and the University of Toronto, found individuals living in areas with the lowest levels of green space were 24% more likely to develop schizophrenia.
This study contributes to a growing body of evidence showing the importance of exposure to green space to mental health.
“These findings contribute to a growing evidence base that environmental factors may play a role in the etiology of schizophrenia,” the researchers write.
The study was published online Feb. 4 in the Canadian Journal of Psychiatry.
Underlying mechanism unknown
For the study, researchers used a retrospective population-based cohort of 649,020 individuals between ages 14 and 40 years from different neighborhoods in Toronto.
Green space was calculated using geospatial data of all public parks and green spaces in the city; data were drawn from the Urban Health Equity Assessment and Response Tool.
Over a 10-year period, 4,841 participants were diagnosed with schizophrenia.
Those who lived in neighborhoods with the least amount of green space were significantly more likely to develop schizophrenia than those who lived in areas with the most green space, even after adjusting for age, sex, and neighborhood-level marginalization (adjusted incidence rate ratio, 1.24; 95% confidence interval, 1.06-1.45).
Overall, schizophrenia risk was also elevated in men vs. women (adjusted IRR, 1.59; 95% CI, 1.50-1.68). Those living in areas with moderate amounts of green space did not have an increased schizophrenia risk.
“We found that residing in an area with the lowest amount of green space was associated with an increased risk of developing schizophrenia, independent of other sociodemographic and socioenvironmental factors,” the researchers note. “The underlying mechanism at play is unknown and requires further study.”
One possibility, they added, is that exposure to green space may reduce the risk of air pollution, which other studies have suggested may be associated with increased schizophrenia risk.
The new study builds on a 2018 report from Denmark that showed a 52% increased risk of psychotic disorders in adulthood among people who spent their childhood in neighborhoods with little green space.
Important, longitudinal data
Commenting on the findings, John Torous, MD, director of digital psychiatry at Beth Israel Deaconess Medical Center, Boston, said the study provides important longitudinal data.
“The 10-year duration of the study and large sample size make the results very compelling and help confirm what has been thought about green space and risk of schizophrenia,” Dr. Torous said.
“Often, we think of green space at a very macro level,” he added. “This study is important because it shows us that green space matters on a block-by-block level just as much.”
The study was unfunded. The authors and Dr. Torous have disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
The investigators, led by Martin Rotenberg, MD, of Centre for Addiction and Mental Health and the University of Toronto, found individuals living in areas with the lowest levels of green space were 24% more likely to develop schizophrenia.
This study contributes to a growing body of evidence showing the importance of exposure to green space to mental health.
“These findings contribute to a growing evidence base that environmental factors may play a role in the etiology of schizophrenia,” the researchers write.
The study was published online Feb. 4 in the Canadian Journal of Psychiatry.
Underlying mechanism unknown
For the study, researchers used a retrospective population-based cohort of 649,020 individuals between ages 14 and 40 years from different neighborhoods in Toronto.
Green space was calculated using geospatial data of all public parks and green spaces in the city; data were drawn from the Urban Health Equity Assessment and Response Tool.
Over a 10-year period, 4,841 participants were diagnosed with schizophrenia.
Those who lived in neighborhoods with the least amount of green space were significantly more likely to develop schizophrenia than those who lived in areas with the most green space, even after adjusting for age, sex, and neighborhood-level marginalization (adjusted incidence rate ratio, 1.24; 95% confidence interval, 1.06-1.45).
Overall, schizophrenia risk was also elevated in men vs. women (adjusted IRR, 1.59; 95% CI, 1.50-1.68). Those living in areas with moderate amounts of green space did not have an increased schizophrenia risk.
“We found that residing in an area with the lowest amount of green space was associated with an increased risk of developing schizophrenia, independent of other sociodemographic and socioenvironmental factors,” the researchers note. “The underlying mechanism at play is unknown and requires further study.”
One possibility, they added, is that exposure to green space may reduce the risk of air pollution, which other studies have suggested may be associated with increased schizophrenia risk.
The new study builds on a 2018 report from Denmark that showed a 52% increased risk of psychotic disorders in adulthood among people who spent their childhood in neighborhoods with little green space.
Important, longitudinal data
Commenting on the findings, John Torous, MD, director of digital psychiatry at Beth Israel Deaconess Medical Center, Boston, said the study provides important longitudinal data.
“The 10-year duration of the study and large sample size make the results very compelling and help confirm what has been thought about green space and risk of schizophrenia,” Dr. Torous said.
“Often, we think of green space at a very macro level,” he added. “This study is important because it shows us that green space matters on a block-by-block level just as much.”
The study was unfunded. The authors and Dr. Torous have disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
FROM CANADIAN JOURNAL OF PSYCHIATRY
‘Pandemic brain’ not limited to patients infected with COVID-19
The stress of living through a pandemic may cause brain inflammation even in those uninfected with SARS-CoV-2, a study suggests.
Healthy individuals who tested negative for the virus that causes COVID-19 had elevated levels of inflammatory markers known to be involved in depression, stress, and mental fatigue. The study indicates a possible link between pandemic-associated stressors and neuroimmune responses.
“The most important finding is the evidence of neuroinflammation in noninfected, otherwise healthy participants, which may explain the variety of sickness-behavior-like symptoms experienced by many during the pandemic,” lead author Ludovica Brusaferri, PhD, a postdoctoral research fellow at Massachusetts General Hospital and Harvard Medical School in Boston, told this news organization.
The study was published online Feb. 16 in Brain, Behavior, and Immunity.
Impact of pandemic stress?
Reports of psychological distress have increased considerably in the United States during the pandemic, including among those not infected with SARS-CoV-2.
To better understand the effects of the pandemic on brain and mental health, the investigators retrospectively analyzed data collected from 57 people who were enrolled as control subjects for unrelated studies before the pandemic began.
They also enrolled 15 people living in Massachusetts during that state’s 2-month lockdown/stay-at-home order from March to May 2020, all of whom had tested negative for COVID-19 antibodies.
The investigators used PET and MRI imaging and blood sample analyses to investigate whether there were any differences in the brains of healthy people before and during the pandemic following the lockdown.
Compared with the control group, the pandemic cohort had elevated levels of 18 kDa translocator protein (TSPO) and myoinositol, inflammatory markers in the brain. Increased TSPO has been associated with depression and suicidal thoughts and elevated myoinositol has been linked to schizophrenia.
Blood levels of two inflammatory markers, interleukin-16 and monocyte chemoattractant protein-1, were also elevated in the pandemic cohort, although to a lesser extent.
TSPO levels were especially high in participants in the pandemic cohort who reported moodiness and mental and physical fatigue, compared with those reporting few or no symptoms.
“These findings provide support to a role for neuroinflammation in stress, an observation that, if replicated, might help guide the development of novel treatments focused on the reduction of brain inflammation,” study author Marco Loggia, PhD, codirector of the Center for Integrative Pain NeuroImaging at Mass General and Harvard Medical School, told this news organization.
Although the data showing increased neuroinflammation were collected when participants were under a stay-at-home order, the researchers said it’s not clear that this was the cause.
“We’re not saying it is the lockdown that was causing it,” Dr. Loggia said. “It could have been social isolation, changes in diet, or changes in exercise patterns. We don’t know exactly what the cause was so, maybe.”
A significant contribution
Commenting on the study for this news organization, Ning Quan, PhD, professor of biomedical science at Florida Atlantic University, Boca Raton, said although questions remain, the findings offer valuable information.
“This study contributes significantly to our understanding of how pandemic stress might impact our brain and behavior,” Dr. Quan said. “The main advance that this paper provides is that fatigue or brain fog could be induced in individuals with COVID infection during the pandemic.”
However, Dr. Quan added, the study has a number of limitations, including a small sample size, which makes it difficult to generalize the results.
“Another issue is the subjects of the study all lived in Massachusetts,” Dr. Quan added. “Subjects from different states or different countries could yield different results.”
The study was funded by the National Institutes of Health and by the Landreth Family Foundation. The study authors and Dr. Quan have disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
The stress of living through a pandemic may cause brain inflammation even in those uninfected with SARS-CoV-2, a study suggests.
Healthy individuals who tested negative for the virus that causes COVID-19 had elevated levels of inflammatory markers known to be involved in depression, stress, and mental fatigue. The study indicates a possible link between pandemic-associated stressors and neuroimmune responses.
“The most important finding is the evidence of neuroinflammation in noninfected, otherwise healthy participants, which may explain the variety of sickness-behavior-like symptoms experienced by many during the pandemic,” lead author Ludovica Brusaferri, PhD, a postdoctoral research fellow at Massachusetts General Hospital and Harvard Medical School in Boston, told this news organization.
The study was published online Feb. 16 in Brain, Behavior, and Immunity.
Impact of pandemic stress?
Reports of psychological distress have increased considerably in the United States during the pandemic, including among those not infected with SARS-CoV-2.
To better understand the effects of the pandemic on brain and mental health, the investigators retrospectively analyzed data collected from 57 people who were enrolled as control subjects for unrelated studies before the pandemic began.
They also enrolled 15 people living in Massachusetts during that state’s 2-month lockdown/stay-at-home order from March to May 2020, all of whom had tested negative for COVID-19 antibodies.
The investigators used PET and MRI imaging and blood sample analyses to investigate whether there were any differences in the brains of healthy people before and during the pandemic following the lockdown.
Compared with the control group, the pandemic cohort had elevated levels of 18 kDa translocator protein (TSPO) and myoinositol, inflammatory markers in the brain. Increased TSPO has been associated with depression and suicidal thoughts and elevated myoinositol has been linked to schizophrenia.
Blood levels of two inflammatory markers, interleukin-16 and monocyte chemoattractant protein-1, were also elevated in the pandemic cohort, although to a lesser extent.
TSPO levels were especially high in participants in the pandemic cohort who reported moodiness and mental and physical fatigue, compared with those reporting few or no symptoms.
“These findings provide support to a role for neuroinflammation in stress, an observation that, if replicated, might help guide the development of novel treatments focused on the reduction of brain inflammation,” study author Marco Loggia, PhD, codirector of the Center for Integrative Pain NeuroImaging at Mass General and Harvard Medical School, told this news organization.
Although the data showing increased neuroinflammation were collected when participants were under a stay-at-home order, the researchers said it’s not clear that this was the cause.
“We’re not saying it is the lockdown that was causing it,” Dr. Loggia said. “It could have been social isolation, changes in diet, or changes in exercise patterns. We don’t know exactly what the cause was so, maybe.”
A significant contribution
Commenting on the study for this news organization, Ning Quan, PhD, professor of biomedical science at Florida Atlantic University, Boca Raton, said although questions remain, the findings offer valuable information.
“This study contributes significantly to our understanding of how pandemic stress might impact our brain and behavior,” Dr. Quan said. “The main advance that this paper provides is that fatigue or brain fog could be induced in individuals with COVID infection during the pandemic.”
However, Dr. Quan added, the study has a number of limitations, including a small sample size, which makes it difficult to generalize the results.
“Another issue is the subjects of the study all lived in Massachusetts,” Dr. Quan added. “Subjects from different states or different countries could yield different results.”
The study was funded by the National Institutes of Health and by the Landreth Family Foundation. The study authors and Dr. Quan have disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
The stress of living through a pandemic may cause brain inflammation even in those uninfected with SARS-CoV-2, a study suggests.
Healthy individuals who tested negative for the virus that causes COVID-19 had elevated levels of inflammatory markers known to be involved in depression, stress, and mental fatigue. The study indicates a possible link between pandemic-associated stressors and neuroimmune responses.
“The most important finding is the evidence of neuroinflammation in noninfected, otherwise healthy participants, which may explain the variety of sickness-behavior-like symptoms experienced by many during the pandemic,” lead author Ludovica Brusaferri, PhD, a postdoctoral research fellow at Massachusetts General Hospital and Harvard Medical School in Boston, told this news organization.
The study was published online Feb. 16 in Brain, Behavior, and Immunity.
Impact of pandemic stress?
Reports of psychological distress have increased considerably in the United States during the pandemic, including among those not infected with SARS-CoV-2.
To better understand the effects of the pandemic on brain and mental health, the investigators retrospectively analyzed data collected from 57 people who were enrolled as control subjects for unrelated studies before the pandemic began.
They also enrolled 15 people living in Massachusetts during that state’s 2-month lockdown/stay-at-home order from March to May 2020, all of whom had tested negative for COVID-19 antibodies.
The investigators used PET and MRI imaging and blood sample analyses to investigate whether there were any differences in the brains of healthy people before and during the pandemic following the lockdown.
Compared with the control group, the pandemic cohort had elevated levels of 18 kDa translocator protein (TSPO) and myoinositol, inflammatory markers in the brain. Increased TSPO has been associated with depression and suicidal thoughts and elevated myoinositol has been linked to schizophrenia.
Blood levels of two inflammatory markers, interleukin-16 and monocyte chemoattractant protein-1, were also elevated in the pandemic cohort, although to a lesser extent.
TSPO levels were especially high in participants in the pandemic cohort who reported moodiness and mental and physical fatigue, compared with those reporting few or no symptoms.
“These findings provide support to a role for neuroinflammation in stress, an observation that, if replicated, might help guide the development of novel treatments focused on the reduction of brain inflammation,” study author Marco Loggia, PhD, codirector of the Center for Integrative Pain NeuroImaging at Mass General and Harvard Medical School, told this news organization.
Although the data showing increased neuroinflammation were collected when participants were under a stay-at-home order, the researchers said it’s not clear that this was the cause.
“We’re not saying it is the lockdown that was causing it,” Dr. Loggia said. “It could have been social isolation, changes in diet, or changes in exercise patterns. We don’t know exactly what the cause was so, maybe.”
A significant contribution
Commenting on the study for this news organization, Ning Quan, PhD, professor of biomedical science at Florida Atlantic University, Boca Raton, said although questions remain, the findings offer valuable information.
“This study contributes significantly to our understanding of how pandemic stress might impact our brain and behavior,” Dr. Quan said. “The main advance that this paper provides is that fatigue or brain fog could be induced in individuals with COVID infection during the pandemic.”
However, Dr. Quan added, the study has a number of limitations, including a small sample size, which makes it difficult to generalize the results.
“Another issue is the subjects of the study all lived in Massachusetts,” Dr. Quan added. “Subjects from different states or different countries could yield different results.”
The study was funded by the National Institutes of Health and by the Landreth Family Foundation. The study authors and Dr. Quan have disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
FROM BRAIN, BEHAVIOR, AND IMMUNITY
Restoring ‘sixth sense’ may reduce falls in Alzheimer’s
(AD), new research confirms.
Falls are twice as common in patients with AD versu older individuals without the disorder and significantly increase the likelihood of institutionalization.
However, researchers recorded fewer falls in patients with a better functioning vestibular system, which detects head movements and plays a critical role in spatial orientation, posture, gait, and balance.
The results suggest that improving vestibular function with currently available therapies may prevent falls, something the researchers will investigate in a new clinical trial launching next month.
“One of the most dangerous and impactful symptoms in terms of function in patients with Alzheimer’s disease is their increased predisposition to falls,” study investigator Yuri Agrawal, MD, department of otolaryngology–head and neck surgery, Johns Hopkins University School of Medicine, Baltimore, said in an interview. “Alzheimer’s is the sixth leading cause of death in the U.S., and some people actually say that that high mortality rate is because of their predisposition to falls and the injuries that occur.”
The study was published online Feb. 14 in the Journal of Alzheimer’s Disease.
The ‘sixth hidden sense’
The vestibular system consists of three semicircular canals, which detect rotational head movement, and two otolith organs called the utricle and the saccule, which sense linear head movements and the orientation of the head with respect to gravity.
“We call the vestibular system the sixth hidden sense because it’s not a conscious perception like taste or smell,” Dr. Agrawal said. “It’s constantly providing input to our brain about where we are in space.”
Dr. Agrawal and colleagues previously reported that vestibular loss is twice as common in Alzheimer’s patients as in cognitively unimpaired age-matched controls. Now, they wanted to know if this sensory loss was associated with an increased risk for falls in this population.
The study included 48 patients age greater than or equal to 60 years with mild-to-moderate AD between 2018 and 2020. They also included an age-matched control group of healthy controls with no cognitive impairment.
Researchers assessed vestibular function at baseline by measuring semicircular canal and saccular function. One test required participants to wear goggles and complete a series of tests with their eyes open and closed while researchers recorded their eye movement with video-oculography. They also measured participants’ balance using the Berg Balance Scale.
Relative to matched controls, AD patients exhibited increased lateral instability when their eyes were open (P = .033) and closed (P = .042). Studies suggest that lateral stability declines more quickly with age and that instability with eyes closed is the single biggest predictor of incident falls in community-dwelling adults.
To determine if poor vestibular function increased fall risk in patients with AD, researchers followed the cohort for up to 2 years.
“We found that patients with vestibular loss at baseline were 50% more likely to fall, adjusting for other factors that could contribute to that,” Dr. Agrawal said.
Specifically, better semicircular canal function was significantly associated with lower likelihood of falls, even after adjusting for confounders (adjusted hazard ratio, 0.65; P = .009).
Can therapy help?
Commenting on the findings, James Burke, MD, PhD, professor of neurology at Duke University Medical Center, Durham, N.C., said that the finding that impaired vestibular function is associated with increased falls “significantly advances our understanding of the topic” and suggests that treating vestibular dysfunction could reduce falls in Alzheimer’s patients.
“Screening patients with Alzheimer’s disease for impaired vestibular function could lead to identification of individuals at high risk of falls and target those who would benefit from vestibular therapy,” he said.
Vestibular rehabilitation therapy is often used to treat a number of disorders related to vestibular function loss. There are also studies underway to measure the efficacy of a vestibular implant that works much like a cochlear implant.
While evaluation of vestibular function is currently not routinely included in AD care, studies such as these suggest it may be time to consider adding it to the standard of care, Jennifer Coto, PhD, assistant professor of otolaryngology at the University of Miami Miller School of Medicine, said in an interview.
“Best practice guidelines for management of Alzheimer’s patients should be revised to include routine vestibular evaluation and support from a multidisciplinary team that may address other crucial areas of functioning, particularly psychological functioning, sleep, and independence,” she said.
“Future research also needs to evaluate the effectiveness of vestibular therapy in patients with Alzheimer’s and the benefits of early identification and intervention for preventing recurrent falls.”
Dr. Agrawal is leading a 5-year, $3.5 million National Institute on Aging study that seeks to do just that. Enrollment in the study begins next month. Patients will complete an initial in-person screening, but the remainder of the study will be conducted virtually.
Therapies will be noninvasive, nonpharmaceutical, and performed in participants’ homes. If the therapy is successful at reducing falls, Dr. Agrawal said the virtual design would significantly broaden its potential patient reach.
The study was funded by the National Institute on Aging. Study authors’ disclosures are reported in the original article. Dr. Coto and Dr. Burke report no relevant financial relationships.
A version of this article first appeared on Medscape.com.
(AD), new research confirms.
Falls are twice as common in patients with AD versu older individuals without the disorder and significantly increase the likelihood of institutionalization.
However, researchers recorded fewer falls in patients with a better functioning vestibular system, which detects head movements and plays a critical role in spatial orientation, posture, gait, and balance.
The results suggest that improving vestibular function with currently available therapies may prevent falls, something the researchers will investigate in a new clinical trial launching next month.
“One of the most dangerous and impactful symptoms in terms of function in patients with Alzheimer’s disease is their increased predisposition to falls,” study investigator Yuri Agrawal, MD, department of otolaryngology–head and neck surgery, Johns Hopkins University School of Medicine, Baltimore, said in an interview. “Alzheimer’s is the sixth leading cause of death in the U.S., and some people actually say that that high mortality rate is because of their predisposition to falls and the injuries that occur.”
The study was published online Feb. 14 in the Journal of Alzheimer’s Disease.
The ‘sixth hidden sense’
The vestibular system consists of three semicircular canals, which detect rotational head movement, and two otolith organs called the utricle and the saccule, which sense linear head movements and the orientation of the head with respect to gravity.
“We call the vestibular system the sixth hidden sense because it’s not a conscious perception like taste or smell,” Dr. Agrawal said. “It’s constantly providing input to our brain about where we are in space.”
Dr. Agrawal and colleagues previously reported that vestibular loss is twice as common in Alzheimer’s patients as in cognitively unimpaired age-matched controls. Now, they wanted to know if this sensory loss was associated with an increased risk for falls in this population.
The study included 48 patients age greater than or equal to 60 years with mild-to-moderate AD between 2018 and 2020. They also included an age-matched control group of healthy controls with no cognitive impairment.
Researchers assessed vestibular function at baseline by measuring semicircular canal and saccular function. One test required participants to wear goggles and complete a series of tests with their eyes open and closed while researchers recorded their eye movement with video-oculography. They also measured participants’ balance using the Berg Balance Scale.
Relative to matched controls, AD patients exhibited increased lateral instability when their eyes were open (P = .033) and closed (P = .042). Studies suggest that lateral stability declines more quickly with age and that instability with eyes closed is the single biggest predictor of incident falls in community-dwelling adults.
To determine if poor vestibular function increased fall risk in patients with AD, researchers followed the cohort for up to 2 years.
“We found that patients with vestibular loss at baseline were 50% more likely to fall, adjusting for other factors that could contribute to that,” Dr. Agrawal said.
Specifically, better semicircular canal function was significantly associated with lower likelihood of falls, even after adjusting for confounders (adjusted hazard ratio, 0.65; P = .009).
Can therapy help?
Commenting on the findings, James Burke, MD, PhD, professor of neurology at Duke University Medical Center, Durham, N.C., said that the finding that impaired vestibular function is associated with increased falls “significantly advances our understanding of the topic” and suggests that treating vestibular dysfunction could reduce falls in Alzheimer’s patients.
“Screening patients with Alzheimer’s disease for impaired vestibular function could lead to identification of individuals at high risk of falls and target those who would benefit from vestibular therapy,” he said.
Vestibular rehabilitation therapy is often used to treat a number of disorders related to vestibular function loss. There are also studies underway to measure the efficacy of a vestibular implant that works much like a cochlear implant.
While evaluation of vestibular function is currently not routinely included in AD care, studies such as these suggest it may be time to consider adding it to the standard of care, Jennifer Coto, PhD, assistant professor of otolaryngology at the University of Miami Miller School of Medicine, said in an interview.
“Best practice guidelines for management of Alzheimer’s patients should be revised to include routine vestibular evaluation and support from a multidisciplinary team that may address other crucial areas of functioning, particularly psychological functioning, sleep, and independence,” she said.
“Future research also needs to evaluate the effectiveness of vestibular therapy in patients with Alzheimer’s and the benefits of early identification and intervention for preventing recurrent falls.”
Dr. Agrawal is leading a 5-year, $3.5 million National Institute on Aging study that seeks to do just that. Enrollment in the study begins next month. Patients will complete an initial in-person screening, but the remainder of the study will be conducted virtually.
Therapies will be noninvasive, nonpharmaceutical, and performed in participants’ homes. If the therapy is successful at reducing falls, Dr. Agrawal said the virtual design would significantly broaden its potential patient reach.
The study was funded by the National Institute on Aging. Study authors’ disclosures are reported in the original article. Dr. Coto and Dr. Burke report no relevant financial relationships.
A version of this article first appeared on Medscape.com.
(AD), new research confirms.
Falls are twice as common in patients with AD versu older individuals without the disorder and significantly increase the likelihood of institutionalization.
However, researchers recorded fewer falls in patients with a better functioning vestibular system, which detects head movements and plays a critical role in spatial orientation, posture, gait, and balance.
The results suggest that improving vestibular function with currently available therapies may prevent falls, something the researchers will investigate in a new clinical trial launching next month.
“One of the most dangerous and impactful symptoms in terms of function in patients with Alzheimer’s disease is their increased predisposition to falls,” study investigator Yuri Agrawal, MD, department of otolaryngology–head and neck surgery, Johns Hopkins University School of Medicine, Baltimore, said in an interview. “Alzheimer’s is the sixth leading cause of death in the U.S., and some people actually say that that high mortality rate is because of their predisposition to falls and the injuries that occur.”
The study was published online Feb. 14 in the Journal of Alzheimer’s Disease.
The ‘sixth hidden sense’
The vestibular system consists of three semicircular canals, which detect rotational head movement, and two otolith organs called the utricle and the saccule, which sense linear head movements and the orientation of the head with respect to gravity.
“We call the vestibular system the sixth hidden sense because it’s not a conscious perception like taste or smell,” Dr. Agrawal said. “It’s constantly providing input to our brain about where we are in space.”
Dr. Agrawal and colleagues previously reported that vestibular loss is twice as common in Alzheimer’s patients as in cognitively unimpaired age-matched controls. Now, they wanted to know if this sensory loss was associated with an increased risk for falls in this population.
The study included 48 patients age greater than or equal to 60 years with mild-to-moderate AD between 2018 and 2020. They also included an age-matched control group of healthy controls with no cognitive impairment.
Researchers assessed vestibular function at baseline by measuring semicircular canal and saccular function. One test required participants to wear goggles and complete a series of tests with their eyes open and closed while researchers recorded their eye movement with video-oculography. They also measured participants’ balance using the Berg Balance Scale.
Relative to matched controls, AD patients exhibited increased lateral instability when their eyes were open (P = .033) and closed (P = .042). Studies suggest that lateral stability declines more quickly with age and that instability with eyes closed is the single biggest predictor of incident falls in community-dwelling adults.
To determine if poor vestibular function increased fall risk in patients with AD, researchers followed the cohort for up to 2 years.
“We found that patients with vestibular loss at baseline were 50% more likely to fall, adjusting for other factors that could contribute to that,” Dr. Agrawal said.
Specifically, better semicircular canal function was significantly associated with lower likelihood of falls, even after adjusting for confounders (adjusted hazard ratio, 0.65; P = .009).
Can therapy help?
Commenting on the findings, James Burke, MD, PhD, professor of neurology at Duke University Medical Center, Durham, N.C., said that the finding that impaired vestibular function is associated with increased falls “significantly advances our understanding of the topic” and suggests that treating vestibular dysfunction could reduce falls in Alzheimer’s patients.
“Screening patients with Alzheimer’s disease for impaired vestibular function could lead to identification of individuals at high risk of falls and target those who would benefit from vestibular therapy,” he said.
Vestibular rehabilitation therapy is often used to treat a number of disorders related to vestibular function loss. There are also studies underway to measure the efficacy of a vestibular implant that works much like a cochlear implant.
While evaluation of vestibular function is currently not routinely included in AD care, studies such as these suggest it may be time to consider adding it to the standard of care, Jennifer Coto, PhD, assistant professor of otolaryngology at the University of Miami Miller School of Medicine, said in an interview.
“Best practice guidelines for management of Alzheimer’s patients should be revised to include routine vestibular evaluation and support from a multidisciplinary team that may address other crucial areas of functioning, particularly psychological functioning, sleep, and independence,” she said.
“Future research also needs to evaluate the effectiveness of vestibular therapy in patients with Alzheimer’s and the benefits of early identification and intervention for preventing recurrent falls.”
Dr. Agrawal is leading a 5-year, $3.5 million National Institute on Aging study that seeks to do just that. Enrollment in the study begins next month. Patients will complete an initial in-person screening, but the remainder of the study will be conducted virtually.
Therapies will be noninvasive, nonpharmaceutical, and performed in participants’ homes. If the therapy is successful at reducing falls, Dr. Agrawal said the virtual design would significantly broaden its potential patient reach.
The study was funded by the National Institute on Aging. Study authors’ disclosures are reported in the original article. Dr. Coto and Dr. Burke report no relevant financial relationships.
A version of this article first appeared on Medscape.com.
FROM THE JOURNAL OF ALZHEIMER’S DISEASE
Cat ownership in childhood linked ‘conditionally’ to psychosis in adult males
Owning an outdoor cat as a child is associated with an increased risk of psychotic experiences in adulthood – but only in males, new research suggests.
Investigators found 
The suspected culprit is not the cat itself but rather exposure to Toxoplasma gondii, a common parasite carried by rodents and sometimes found in cat feces. The study adds to a growing evidence showing exposure to T. gondii may be a risk factor for schizophrenia and other psychotic disorders.
“These are small pieces of evidence but it’s interesting to consider that there might be combinations of risk factors at play,” lead author Vincent Paquin, MD, psychiatry resident at McGill University, Montreal, said in an interview.
“And even if the magnitude of the risk is small at the individual level,” he added, “cats and Toxoplasma gondii are so present in our society that if we add up all these small potential effects then it becomes a potential public health question.”
The study was published online Jan. 30, 2022, in the Journal of Psychiatric Research.
Inconsistent evidence
T. gondii infects about 30% of the human population and is usually transmitted by cats. Most infections are asymptomatic, but T. gondii can cause toxoplasmosis in humans, which has been linked to increased risk of schizophrenia, suicide attempts, and more recently, mild cognitive impairment.
Although some studies show an association between cat ownership and increased risk of mental illness, the research findings have been inconsistent.
“The evidence has been mixed about the association between cat ownership and psychosis expression, so our approach was to consider whether specific factors or combinations of factors could explain this mixed evidence,” Dr. Paquin said.
For the study, 2206 individuals aged 18-40 years completed the Community Assessment of Psychic Experiences (CAPE-42) and a questionnaire to gather information about cat ownership at any time between birth and age 13 and if the cats lived exclusively indoors (nonhunting) or if they were allowed outside (rodent hunting).
Participants were also asked about the number of residential moves between birth and age 15, date and place of birth, lifetime history of head trauma, and tobacco smoking history.
Rodent-hunting cat ownership was associated with higher risk of psychosis in male participants, compared with owning no cat or a nonhunting cat. When the investigators added head trauma and residential moves to rodent-hunting cat ownership, psychosis risk was elevated in both men and women.
Independent of cat ownership, younger age, moving more than three times as a child, a history of head trauma, and being a smoker were all associated with higher psychosis risk.
The study wasn’t designed to explore potential biological mechanisms to explain the sex differences in psychosis risk seen among rodent-hunting cat owners, but “one possible explanation based on the animal model literature is that the neurobiological effects of parasitic exposure may be greater with male sex,” senior author Suzanne King, PhD, professor of psychiatry at McGill, said in an interview.
The new study is part of a larger, long-term project called EnviroGen, led by Dr. King, examining the environmental and genetic risk factors for schizophrenia.
Need for replication
Commenting on the findings, E. Fuller Torrey, MD, who was among the first researchers to identify a link between cat ownership, T. gondii infection, and schizophrenia, said the study is “an interesting addition to the studies of cat ownership in childhood as a risk factor for psychosis.”
Of the approximately 10 published studies on the topic, about half suggest a link between cat ownership and psychosis later in life, said Dr. Torrey, associate director for research at the Stanley Medical Research Institute in Rockville, Md.
“The Canadian study is interesting in that it is the first study that separates exposure to permanently indoor cats from cats that are allowed to go outdoors, and the results were positive only for outdoor cats,” Dr. Torrey said.
The study has limitations, Dr. Torrey added, including its retrospective design and the use of a self-report questionnaire to assess psychotic experiences in adulthood.
Also commenting on findings, James Kirkbride, PhD, professor of psychiatric and social epidemiology, University College London, noted the same limitations.
Dr. Kirkbride is the lead author of a 2017 study that showed no link between cat ownership and serious mental illness that included nearly 5,000 people born in 1991 or 1992 and followed until age 18. In this study, there was no link between psychosis and cat ownership during pregnancy or at ages 4 or 10 years.
“Researchers have long been fascinated with the idea that cat ownership may affect mental health. This paper may have them chasing their own tail,” Dr. Kirkbride said.
“Evidence of any association is limited to certain subgroups without a strong theoretical basis for why this may be the case,” he added. “The retrospective and cross-sectional nature of the survey also raise the possibility that the results are impacted by differential recall bias, as well as the broader issues of chance and unobserved confounding.”
Dr. King noted that recall bias is a limitation the researchers highlighted in their study, but “considering the exposures are relatively objective and factual, we do not believe the potential for recall bias is substantial.”
“Nonetheless, we strongly believe that replication of our results in prospective, population-representative cohorts will be crucial to making firmer conclusions,” he added.
The study was funded by grants from the Quebec Health Research Fund. The study authors and Dr. Kirkbride disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
Owning an outdoor cat as a child is associated with an increased risk of psychotic experiences in adulthood – but only in males, new research suggests.
Investigators found
The suspected culprit is not the cat itself but rather exposure to Toxoplasma gondii, a common parasite carried by rodents and sometimes found in cat feces. The study adds to a growing evidence showing exposure to T. gondii may be a risk factor for schizophrenia and other psychotic disorders.
“These are small pieces of evidence but it’s interesting to consider that there might be combinations of risk factors at play,” lead author Vincent Paquin, MD, psychiatry resident at McGill University, Montreal, said in an interview.
“And even if the magnitude of the risk is small at the individual level,” he added, “cats and Toxoplasma gondii are so present in our society that if we add up all these small potential effects then it becomes a potential public health question.”
The study was published online Jan. 30, 2022, in the Journal of Psychiatric Research.
Inconsistent evidence
T. gondii infects about 30% of the human population and is usually transmitted by cats. Most infections are asymptomatic, but T. gondii can cause toxoplasmosis in humans, which has been linked to increased risk of schizophrenia, suicide attempts, and more recently, mild cognitive impairment.
Although some studies show an association between cat ownership and increased risk of mental illness, the research findings have been inconsistent.
“The evidence has been mixed about the association between cat ownership and psychosis expression, so our approach was to consider whether specific factors or combinations of factors could explain this mixed evidence,” Dr. Paquin said.
For the study, 2206 individuals aged 18-40 years completed the Community Assessment of Psychic Experiences (CAPE-42) and a questionnaire to gather information about cat ownership at any time between birth and age 13 and if the cats lived exclusively indoors (nonhunting) or if they were allowed outside (rodent hunting).
Participants were also asked about the number of residential moves between birth and age 15, date and place of birth, lifetime history of head trauma, and tobacco smoking history.
Rodent-hunting cat ownership was associated with higher risk of psychosis in male participants, compared with owning no cat or a nonhunting cat. When the investigators added head trauma and residential moves to rodent-hunting cat ownership, psychosis risk was elevated in both men and women.
Independent of cat ownership, younger age, moving more than three times as a child, a history of head trauma, and being a smoker were all associated with higher psychosis risk.
The study wasn’t designed to explore potential biological mechanisms to explain the sex differences in psychosis risk seen among rodent-hunting cat owners, but “one possible explanation based on the animal model literature is that the neurobiological effects of parasitic exposure may be greater with male sex,” senior author Suzanne King, PhD, professor of psychiatry at McGill, said in an interview.
The new study is part of a larger, long-term project called EnviroGen, led by Dr. King, examining the environmental and genetic risk factors for schizophrenia.
Need for replication
Commenting on the findings, E. Fuller Torrey, MD, who was among the first researchers to identify a link between cat ownership, T. gondii infection, and schizophrenia, said the study is “an interesting addition to the studies of cat ownership in childhood as a risk factor for psychosis.”
Of the approximately 10 published studies on the topic, about half suggest a link between cat ownership and psychosis later in life, said Dr. Torrey, associate director for research at the Stanley Medical Research Institute in Rockville, Md.
“The Canadian study is interesting in that it is the first study that separates exposure to permanently indoor cats from cats that are allowed to go outdoors, and the results were positive only for outdoor cats,” Dr. Torrey said.
The study has limitations, Dr. Torrey added, including its retrospective design and the use of a self-report questionnaire to assess psychotic experiences in adulthood.
Also commenting on findings, James Kirkbride, PhD, professor of psychiatric and social epidemiology, University College London, noted the same limitations.
Dr. Kirkbride is the lead author of a 2017 study that showed no link between cat ownership and serious mental illness that included nearly 5,000 people born in 1991 or 1992 and followed until age 18. In this study, there was no link between psychosis and cat ownership during pregnancy or at ages 4 or 10 years.
“Researchers have long been fascinated with the idea that cat ownership may affect mental health. This paper may have them chasing their own tail,” Dr. Kirkbride said.
“Evidence of any association is limited to certain subgroups without a strong theoretical basis for why this may be the case,” he added. “The retrospective and cross-sectional nature of the survey also raise the possibility that the results are impacted by differential recall bias, as well as the broader issues of chance and unobserved confounding.”
Dr. King noted that recall bias is a limitation the researchers highlighted in their study, but “considering the exposures are relatively objective and factual, we do not believe the potential for recall bias is substantial.”
“Nonetheless, we strongly believe that replication of our results in prospective, population-representative cohorts will be crucial to making firmer conclusions,” he added.
The study was funded by grants from the Quebec Health Research Fund. The study authors and Dr. Kirkbride disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
Owning an outdoor cat as a child is associated with an increased risk of psychotic experiences in adulthood – but only in males, new research suggests.
Investigators found
The suspected culprit is not the cat itself but rather exposure to Toxoplasma gondii, a common parasite carried by rodents and sometimes found in cat feces. The study adds to a growing evidence showing exposure to T. gondii may be a risk factor for schizophrenia and other psychotic disorders.
“These are small pieces of evidence but it’s interesting to consider that there might be combinations of risk factors at play,” lead author Vincent Paquin, MD, psychiatry resident at McGill University, Montreal, said in an interview.
“And even if the magnitude of the risk is small at the individual level,” he added, “cats and Toxoplasma gondii are so present in our society that if we add up all these small potential effects then it becomes a potential public health question.”
The study was published online Jan. 30, 2022, in the Journal of Psychiatric Research.
Inconsistent evidence
T. gondii infects about 30% of the human population and is usually transmitted by cats. Most infections are asymptomatic, but T. gondii can cause toxoplasmosis in humans, which has been linked to increased risk of schizophrenia, suicide attempts, and more recently, mild cognitive impairment.
Although some studies show an association between cat ownership and increased risk of mental illness, the research findings have been inconsistent.
“The evidence has been mixed about the association between cat ownership and psychosis expression, so our approach was to consider whether specific factors or combinations of factors could explain this mixed evidence,” Dr. Paquin said.
For the study, 2206 individuals aged 18-40 years completed the Community Assessment of Psychic Experiences (CAPE-42) and a questionnaire to gather information about cat ownership at any time between birth and age 13 and if the cats lived exclusively indoors (nonhunting) or if they were allowed outside (rodent hunting).
Participants were also asked about the number of residential moves between birth and age 15, date and place of birth, lifetime history of head trauma, and tobacco smoking history.
Rodent-hunting cat ownership was associated with higher risk of psychosis in male participants, compared with owning no cat or a nonhunting cat. When the investigators added head trauma and residential moves to rodent-hunting cat ownership, psychosis risk was elevated in both men and women.
Independent of cat ownership, younger age, moving more than three times as a child, a history of head trauma, and being a smoker were all associated with higher psychosis risk.
The study wasn’t designed to explore potential biological mechanisms to explain the sex differences in psychosis risk seen among rodent-hunting cat owners, but “one possible explanation based on the animal model literature is that the neurobiological effects of parasitic exposure may be greater with male sex,” senior author Suzanne King, PhD, professor of psychiatry at McGill, said in an interview.
The new study is part of a larger, long-term project called EnviroGen, led by Dr. King, examining the environmental and genetic risk factors for schizophrenia.
Need for replication
Commenting on the findings, E. Fuller Torrey, MD, who was among the first researchers to identify a link between cat ownership, T. gondii infection, and schizophrenia, said the study is “an interesting addition to the studies of cat ownership in childhood as a risk factor for psychosis.”
Of the approximately 10 published studies on the topic, about half suggest a link between cat ownership and psychosis later in life, said Dr. Torrey, associate director for research at the Stanley Medical Research Institute in Rockville, Md.
“The Canadian study is interesting in that it is the first study that separates exposure to permanently indoor cats from cats that are allowed to go outdoors, and the results were positive only for outdoor cats,” Dr. Torrey said.
The study has limitations, Dr. Torrey added, including its retrospective design and the use of a self-report questionnaire to assess psychotic experiences in adulthood.
Also commenting on findings, James Kirkbride, PhD, professor of psychiatric and social epidemiology, University College London, noted the same limitations.
Dr. Kirkbride is the lead author of a 2017 study that showed no link between cat ownership and serious mental illness that included nearly 5,000 people born in 1991 or 1992 and followed until age 18. In this study, there was no link between psychosis and cat ownership during pregnancy or at ages 4 or 10 years.
“Researchers have long been fascinated with the idea that cat ownership may affect mental health. This paper may have them chasing their own tail,” Dr. Kirkbride said.
“Evidence of any association is limited to certain subgroups without a strong theoretical basis for why this may be the case,” he added. “The retrospective and cross-sectional nature of the survey also raise the possibility that the results are impacted by differential recall bias, as well as the broader issues of chance and unobserved confounding.”
Dr. King noted that recall bias is a limitation the researchers highlighted in their study, but “considering the exposures are relatively objective and factual, we do not believe the potential for recall bias is substantial.”
“Nonetheless, we strongly believe that replication of our results in prospective, population-representative cohorts will be crucial to making firmer conclusions,” he added.
The study was funded by grants from the Quebec Health Research Fund. The study authors and Dr. Kirkbride disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
FROM THE JOURNAL OF PSYCHIATRIC RESEARCH
First ‘before-and-after’ COVID-19 brain imaging study shows structural changes
, a new imaging study shows.
In the first study to use magnetic resonance brain imaging, before and after COVID-19, investigators found “greater reduction in grey matter thickness and tissue-contrast in the orbitofrontal cortex and parahippocampal gyrus, greater changes in markers of tissue damage in regions functionally connected to the primary olfactory cortex and greater reduction in global brain size.” However, the researchers urge caution when interpreting the findings.
Gwenaëlle Douaud, PhD, Wellcome Center for Integrative Neuroimaging, Nuffield Department of Clinical Neurosciences, University of Oxford, England, and colleagues describe these brain changes as “modest.”
“Whether these abnormal changes are the hallmark of the spread of the pathogenic effects in the brain, or of the virus itself, and whether these may prefigure a future vulnerability of the limbic system in particular, including memory, for these participants, remains to be investigated,” the researchers wrote.
The findings were published online March 7 in the journal Nature.
Gray matter loss
The investigators analyzed data from the UK Biobank, a large-scale biomedical database with genetic and health information for about 500,000 individuals living in the UK. They identified 785 adults aged 51-81 years who had undergone two brain MRIs about 3 years apart. Of these, 401 tested positive for SARS-CoV-2 before the second scan.
Participants also completed cognitive tests at the time of both scans.
Biobank centers use identical MRI scans and scanning methods, including six types of MRI scans, to image distinct regions of the brain and brain function. Results showed that although some loss of gray matter over time is normal, individuals who were infected with SARS-CoV-2 showed a 0.2% to 2% brain tissue loss in the parahippocampal gyrus, the orbitofrontal cortex, and the insula – all of which are largely involved in the sense of smell.
Participants who had contracted COVID-19 also showed a greater reduction in overall brain volume and a decrease in cognitive function.
Most of those with COVID-19 had only mild or moderate symptoms. However, the findings held even after the researchers excluded patients who had been hospitalized.
More research needed
“These findings might help explain why some people experience brain symptoms long after the acute infection,” Max Taquet, PhD, National Institute for Health Research Oxford Health BRC senior research fellow, University of Oxford, said in a press release.
Dr. Taquet, who was not a part of the study, noted the causes of these brain changes remain to be determined. Questions remain as to “whether they can be prevented or even reverted, as well as whether similar changes are observed in hospitalized patients,” children, younger adults, and minority groups.
“It is possible that these brain changes are not caused by COVID-19 but represent the natural progression of a disease that itself increased the risk of COVID-19,” Dr. Taquet said.
Other experts expressed concern over the findings and emphasized the need for more research.
“I am very concerned by the alarming use of language in the report with terms such as ‘neurodegenerative,’ “ Alan Carson, MD, professor of neuropsychiatry at the Center for Clinical Brain Sciences at the University of Edinburgh, Scotland, said in a press release. “The size and magnitude of brain changes found is very modest and such changes can be caused by a simple change in mental experience,” Dr. Carson said.
“What this study almost certainly shows is the impact, in terms of neural changes, of being disconnected from one’s sense of smell,” he added.
The study was funded by the Wellcome Trust Collaborative. Full financial conflict information for the study authors is included in the original article. Dr. Taquet has collaborated previously with some of the investigators.
A version of this article first appeared on Medscape.com.
, a new imaging study shows.
In the first study to use magnetic resonance brain imaging, before and after COVID-19, investigators found “greater reduction in grey matter thickness and tissue-contrast in the orbitofrontal cortex and parahippocampal gyrus, greater changes in markers of tissue damage in regions functionally connected to the primary olfactory cortex and greater reduction in global brain size.” However, the researchers urge caution when interpreting the findings.
Gwenaëlle Douaud, PhD, Wellcome Center for Integrative Neuroimaging, Nuffield Department of Clinical Neurosciences, University of Oxford, England, and colleagues describe these brain changes as “modest.”
“Whether these abnormal changes are the hallmark of the spread of the pathogenic effects in the brain, or of the virus itself, and whether these may prefigure a future vulnerability of the limbic system in particular, including memory, for these participants, remains to be investigated,” the researchers wrote.
The findings were published online March 7 in the journal Nature.
Gray matter loss
The investigators analyzed data from the UK Biobank, a large-scale biomedical database with genetic and health information for about 500,000 individuals living in the UK. They identified 785 adults aged 51-81 years who had undergone two brain MRIs about 3 years apart. Of these, 401 tested positive for SARS-CoV-2 before the second scan.
Participants also completed cognitive tests at the time of both scans.
Biobank centers use identical MRI scans and scanning methods, including six types of MRI scans, to image distinct regions of the brain and brain function. Results showed that although some loss of gray matter over time is normal, individuals who were infected with SARS-CoV-2 showed a 0.2% to 2% brain tissue loss in the parahippocampal gyrus, the orbitofrontal cortex, and the insula – all of which are largely involved in the sense of smell.
Participants who had contracted COVID-19 also showed a greater reduction in overall brain volume and a decrease in cognitive function.
Most of those with COVID-19 had only mild or moderate symptoms. However, the findings held even after the researchers excluded patients who had been hospitalized.
More research needed
“These findings might help explain why some people experience brain symptoms long after the acute infection,” Max Taquet, PhD, National Institute for Health Research Oxford Health BRC senior research fellow, University of Oxford, said in a press release.
Dr. Taquet, who was not a part of the study, noted the causes of these brain changes remain to be determined. Questions remain as to “whether they can be prevented or even reverted, as well as whether similar changes are observed in hospitalized patients,” children, younger adults, and minority groups.
“It is possible that these brain changes are not caused by COVID-19 but represent the natural progression of a disease that itself increased the risk of COVID-19,” Dr. Taquet said.
Other experts expressed concern over the findings and emphasized the need for more research.
“I am very concerned by the alarming use of language in the report with terms such as ‘neurodegenerative,’ “ Alan Carson, MD, professor of neuropsychiatry at the Center for Clinical Brain Sciences at the University of Edinburgh, Scotland, said in a press release. “The size and magnitude of brain changes found is very modest and such changes can be caused by a simple change in mental experience,” Dr. Carson said.
“What this study almost certainly shows is the impact, in terms of neural changes, of being disconnected from one’s sense of smell,” he added.
The study was funded by the Wellcome Trust Collaborative. Full financial conflict information for the study authors is included in the original article. Dr. Taquet has collaborated previously with some of the investigators.
A version of this article first appeared on Medscape.com.
, a new imaging study shows.
In the first study to use magnetic resonance brain imaging, before and after COVID-19, investigators found “greater reduction in grey matter thickness and tissue-contrast in the orbitofrontal cortex and parahippocampal gyrus, greater changes in markers of tissue damage in regions functionally connected to the primary olfactory cortex and greater reduction in global brain size.” However, the researchers urge caution when interpreting the findings.
Gwenaëlle Douaud, PhD, Wellcome Center for Integrative Neuroimaging, Nuffield Department of Clinical Neurosciences, University of Oxford, England, and colleagues describe these brain changes as “modest.”
“Whether these abnormal changes are the hallmark of the spread of the pathogenic effects in the brain, or of the virus itself, and whether these may prefigure a future vulnerability of the limbic system in particular, including memory, for these participants, remains to be investigated,” the researchers wrote.
The findings were published online March 7 in the journal Nature.
Gray matter loss
The investigators analyzed data from the UK Biobank, a large-scale biomedical database with genetic and health information for about 500,000 individuals living in the UK. They identified 785 adults aged 51-81 years who had undergone two brain MRIs about 3 years apart. Of these, 401 tested positive for SARS-CoV-2 before the second scan.
Participants also completed cognitive tests at the time of both scans.
Biobank centers use identical MRI scans and scanning methods, including six types of MRI scans, to image distinct regions of the brain and brain function. Results showed that although some loss of gray matter over time is normal, individuals who were infected with SARS-CoV-2 showed a 0.2% to 2% brain tissue loss in the parahippocampal gyrus, the orbitofrontal cortex, and the insula – all of which are largely involved in the sense of smell.
Participants who had contracted COVID-19 also showed a greater reduction in overall brain volume and a decrease in cognitive function.
Most of those with COVID-19 had only mild or moderate symptoms. However, the findings held even after the researchers excluded patients who had been hospitalized.
More research needed
“These findings might help explain why some people experience brain symptoms long after the acute infection,” Max Taquet, PhD, National Institute for Health Research Oxford Health BRC senior research fellow, University of Oxford, said in a press release.
Dr. Taquet, who was not a part of the study, noted the causes of these brain changes remain to be determined. Questions remain as to “whether they can be prevented or even reverted, as well as whether similar changes are observed in hospitalized patients,” children, younger adults, and minority groups.
“It is possible that these brain changes are not caused by COVID-19 but represent the natural progression of a disease that itself increased the risk of COVID-19,” Dr. Taquet said.
Other experts expressed concern over the findings and emphasized the need for more research.
“I am very concerned by the alarming use of language in the report with terms such as ‘neurodegenerative,’ “ Alan Carson, MD, professor of neuropsychiatry at the Center for Clinical Brain Sciences at the University of Edinburgh, Scotland, said in a press release. “The size and magnitude of brain changes found is very modest and such changes can be caused by a simple change in mental experience,” Dr. Carson said.
“What this study almost certainly shows is the impact, in terms of neural changes, of being disconnected from one’s sense of smell,” he added.
The study was funded by the Wellcome Trust Collaborative. Full financial conflict information for the study authors is included in the original article. Dr. Taquet has collaborated previously with some of the investigators.
A version of this article first appeared on Medscape.com.
From Nature
Columbia names interim chair of psychiatry after Twitter controversy
Helen Blair Simpson, MD, PhD, will take over for Jeffrey Lieberman, MD, who was suspended over a tweet he sent that was widely condemned as both racist and sexist.
She will also serve as interim director of the New York State Psychiatric Institute and interim psychiatrist-in-chief at New York–Presbyterian/Columbia University Irving Medical Center, the email stated.
All appointments were effective on Feb. 28.
Latest response
Dr. Simpson, who joined the faculty at Columbia in 1999, previously served as a professor and vice chair of research for the psychiatry department, director of Columbia’s Center for Obsessive-Compulsive and Related Disorders, and director of psychiatry research at the New York State Psychiatric Institute. Dr. Simpson is associate editor of JAMA Psychiatry and is president-elect of the Anxiety and Depression Association of America.
Her research has been continuously funded by the National Institute of Mental Health since 1999, and she has advised both the World Health Organization and the American Psychiatric Association on the diagnosis and treatment of OCD.
Dr. Simpson has a bachelor’s degree in biology from Yale University and completed an MD-PhD program at The Rockefeller University and Weill Cornell Medicine, New York. She did her residency in psychiatry at New York–Presbyterian.
The announcement is Columbia’s latest response to the furor that erupted on social media following Dr. Lieberman’s tweet about Sudanese model Nyakim Gatwech, in which he wrote, “Whether a work of art or a freak of nature she’s a beautiful sight to behold.”
Twitter reacted immediately and negatively to the tweet, which even Dr. Lieberman later acknowledged was “racist and sexist” in an email apology he sent Feb. 22 to faculty and staff in the department of psychiatry.
As reported by this news organization, Columbia suspended Dr. Lieberman from his chair position on Feb. 23 and permanently removed him from the post of psychiatrist-in-chief at New York–Presbyterian Hospital/Columbia University Irving Medical Center. Lieberman also resigned as executive director of the New York State Psychiatric Institute.
The email announcing Simpson’s appointment was signed by Katrina Armstrong, MD, incoming CEO, Columbia University Irving Medical Center and dean of the Faculties of Health Sciences and the Vagelos College of Physicians and Surgeons; Anil K. Rustgi, MD, interim executive vice president and dean of the Faculties of Health Sciences and Medicine; Steven J. Corwin, MD; president and CEO, New York–Presbyterian; and Ann Marie Sullivan, MD, commissioner of the New York State Office of Mental Health.
This is a developing story.
A version of this article first appeared on Medscape.com.
Helen Blair Simpson, MD, PhD, will take over for Jeffrey Lieberman, MD, who was suspended over a tweet he sent that was widely condemned as both racist and sexist.
She will also serve as interim director of the New York State Psychiatric Institute and interim psychiatrist-in-chief at New York–Presbyterian/Columbia University Irving Medical Center, the email stated.
All appointments were effective on Feb. 28.
Latest response
Dr. Simpson, who joined the faculty at Columbia in 1999, previously served as a professor and vice chair of research for the psychiatry department, director of Columbia’s Center for Obsessive-Compulsive and Related Disorders, and director of psychiatry research at the New York State Psychiatric Institute. Dr. Simpson is associate editor of JAMA Psychiatry and is president-elect of the Anxiety and Depression Association of America.
Her research has been continuously funded by the National Institute of Mental Health since 1999, and she has advised both the World Health Organization and the American Psychiatric Association on the diagnosis and treatment of OCD.
Dr. Simpson has a bachelor’s degree in biology from Yale University and completed an MD-PhD program at The Rockefeller University and Weill Cornell Medicine, New York. She did her residency in psychiatry at New York–Presbyterian.
The announcement is Columbia’s latest response to the furor that erupted on social media following Dr. Lieberman’s tweet about Sudanese model Nyakim Gatwech, in which he wrote, “Whether a work of art or a freak of nature she’s a beautiful sight to behold.”
Twitter reacted immediately and negatively to the tweet, which even Dr. Lieberman later acknowledged was “racist and sexist” in an email apology he sent Feb. 22 to faculty and staff in the department of psychiatry.
As reported by this news organization, Columbia suspended Dr. Lieberman from his chair position on Feb. 23 and permanently removed him from the post of psychiatrist-in-chief at New York–Presbyterian Hospital/Columbia University Irving Medical Center. Lieberman also resigned as executive director of the New York State Psychiatric Institute.
The email announcing Simpson’s appointment was signed by Katrina Armstrong, MD, incoming CEO, Columbia University Irving Medical Center and dean of the Faculties of Health Sciences and the Vagelos College of Physicians and Surgeons; Anil K. Rustgi, MD, interim executive vice president and dean of the Faculties of Health Sciences and Medicine; Steven J. Corwin, MD; president and CEO, New York–Presbyterian; and Ann Marie Sullivan, MD, commissioner of the New York State Office of Mental Health.
This is a developing story.
A version of this article first appeared on Medscape.com.
Helen Blair Simpson, MD, PhD, will take over for Jeffrey Lieberman, MD, who was suspended over a tweet he sent that was widely condemned as both racist and sexist.
She will also serve as interim director of the New York State Psychiatric Institute and interim psychiatrist-in-chief at New York–Presbyterian/Columbia University Irving Medical Center, the email stated.
All appointments were effective on Feb. 28.
Latest response
Dr. Simpson, who joined the faculty at Columbia in 1999, previously served as a professor and vice chair of research for the psychiatry department, director of Columbia’s Center for Obsessive-Compulsive and Related Disorders, and director of psychiatry research at the New York State Psychiatric Institute. Dr. Simpson is associate editor of JAMA Psychiatry and is president-elect of the Anxiety and Depression Association of America.
Her research has been continuously funded by the National Institute of Mental Health since 1999, and she has advised both the World Health Organization and the American Psychiatric Association on the diagnosis and treatment of OCD.
Dr. Simpson has a bachelor’s degree in biology from Yale University and completed an MD-PhD program at The Rockefeller University and Weill Cornell Medicine, New York. She did her residency in psychiatry at New York–Presbyterian.
The announcement is Columbia’s latest response to the furor that erupted on social media following Dr. Lieberman’s tweet about Sudanese model Nyakim Gatwech, in which he wrote, “Whether a work of art or a freak of nature she’s a beautiful sight to behold.”
Twitter reacted immediately and negatively to the tweet, which even Dr. Lieberman later acknowledged was “racist and sexist” in an email apology he sent Feb. 22 to faculty and staff in the department of psychiatry.
As reported by this news organization, Columbia suspended Dr. Lieberman from his chair position on Feb. 23 and permanently removed him from the post of psychiatrist-in-chief at New York–Presbyterian Hospital/Columbia University Irving Medical Center. Lieberman also resigned as executive director of the New York State Psychiatric Institute.
The email announcing Simpson’s appointment was signed by Katrina Armstrong, MD, incoming CEO, Columbia University Irving Medical Center and dean of the Faculties of Health Sciences and the Vagelos College of Physicians and Surgeons; Anil K. Rustgi, MD, interim executive vice president and dean of the Faculties of Health Sciences and Medicine; Steven J. Corwin, MD; president and CEO, New York–Presbyterian; and Ann Marie Sullivan, MD, commissioner of the New York State Office of Mental Health.
This is a developing story.
A version of this article first appeared on Medscape.com.
First recording of dying brain shows memory, meditation patterns
Although only a single case study, researchers say the recording raises the possibility that as we die, our lives really do flash before our eyes.
“The same neurophysiological activity patterns that occur in our brains when we dream, remember, meditate, concentrate – these same patterns also appear just before we die,” study investigator Ajmal Zemmar, MD, PhD, assistant professor of neurosurgery at the University of Louisville (Ky.), said in an interview.
The research was published online Feb. 22, 2022, in the Frontiers in Aging Neuroscience.
Accidental finding
The recording of brain activity was captured inadvertently in 2016 when neuroscientists used continuous EEG to detect and treat seizures in an 87-year-old man who had developed epilepsy after a traumatic brain injury, While undergoing the EEG, the patient had a cardiac arrest and died.
In the 30 seconds before and after blood flow to the brain stopped, the EEG showed an increase in gamma oscillations. These are brain waves known to be involved in high cognitive functions, including conscious perception and memory flashbacks.
Researchers also noted changes in alpha, theta, delta, and beta wave activity just before and just after cardiac arrest, and that changes in one type modulated changes in others. That suggests a coordinated rhythm, which further suggests the activity is more than just the firing of neurons as they die.
“When you observe this and you observe the rhythmic oscillation, you are inclined to think this may be a coordinated activity pattern of the brain rather than a mere discharge when the brain dies,” Dr. Zemmar said.
Although they’ve had the data since 2016, Dr. Zemmar and colleagues held off on publishing in the hopes of finding similar recordings in other individuals. That their 5-year search yielded no results illustrates just how difficult a study like this is to conduct, Dr. Zemmar noted. “We’re trying to figure out how to do this in a predictable way, but obtaining datasets like this is going to be challenging,” he said.
Although Dr. Zemmar was unable to find recordings of activity in the dying brains of other humans, he did find a similar study conducted with rats in 2013. In that research, investigators reported a surge of brain activity in rats just prior to and immediately after experimental cardiac arrest. Changes in high- and low-frequency brain waves mirrored those documented in the current case study.
Bringing a picture together
Commenting on the new study, George Mashour, MD, PhD, professor and chair of anesthesiology and professor of neurosurgery and pharmacology at the University of Michigan, Ann Arbor, said the results are eerily similar to a 2013 study that he coauthored.
Although the current research is just a single case study, Dr. Mashour said when taken with his team’s findings in rats and other work, the new findings are “starting to put a picture together of what might be going on in the dying brain.”
“They were able to record throughout the process of cardiac arrest and death and what they found was strikingly similar to what we found in our highly controlled animal study,” said Dr. Mashour, who is also the founding director of the Center for Consciousness Science at the University of Michigan.
“There was a surge of higher-frequency activity and there was coherence across different parts of the brain,” he added. “That suggests that what we found in the rigorous controlled setting of a laboratory actually translates to humans who are undergoing the clinical process of dying.”
What remains unclear is whether this brain activity explains the near-death experiences described in the literature, which include “life recall” of memories, Dr. Mashour said. “This higher-frequency surge that’s happening around the time of death, is that correlated with experiencing something like this near-death experience? Or is it just a neural feature that can just as easily happen in an unconscious brain?”
The study was funded by the Heidi Demetriades Foundation, the ETH Zürich Foundation, and the Henan Provincial People’s Hospital Outstanding Talents Founding Grant Project. Dr. Zemmar and Dr. Mashour disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
Although only a single case study, researchers say the recording raises the possibility that as we die, our lives really do flash before our eyes.
“The same neurophysiological activity patterns that occur in our brains when we dream, remember, meditate, concentrate – these same patterns also appear just before we die,” study investigator Ajmal Zemmar, MD, PhD, assistant professor of neurosurgery at the University of Louisville (Ky.), said in an interview.
The research was published online Feb. 22, 2022, in the Frontiers in Aging Neuroscience.
Accidental finding
The recording of brain activity was captured inadvertently in 2016 when neuroscientists used continuous EEG to detect and treat seizures in an 87-year-old man who had developed epilepsy after a traumatic brain injury, While undergoing the EEG, the patient had a cardiac arrest and died.
In the 30 seconds before and after blood flow to the brain stopped, the EEG showed an increase in gamma oscillations. These are brain waves known to be involved in high cognitive functions, including conscious perception and memory flashbacks.
Researchers also noted changes in alpha, theta, delta, and beta wave activity just before and just after cardiac arrest, and that changes in one type modulated changes in others. That suggests a coordinated rhythm, which further suggests the activity is more than just the firing of neurons as they die.
“When you observe this and you observe the rhythmic oscillation, you are inclined to think this may be a coordinated activity pattern of the brain rather than a mere discharge when the brain dies,” Dr. Zemmar said.
Although they’ve had the data since 2016, Dr. Zemmar and colleagues held off on publishing in the hopes of finding similar recordings in other individuals. That their 5-year search yielded no results illustrates just how difficult a study like this is to conduct, Dr. Zemmar noted. “We’re trying to figure out how to do this in a predictable way, but obtaining datasets like this is going to be challenging,” he said.
Although Dr. Zemmar was unable to find recordings of activity in the dying brains of other humans, he did find a similar study conducted with rats in 2013. In that research, investigators reported a surge of brain activity in rats just prior to and immediately after experimental cardiac arrest. Changes in high- and low-frequency brain waves mirrored those documented in the current case study.
Bringing a picture together
Commenting on the new study, George Mashour, MD, PhD, professor and chair of anesthesiology and professor of neurosurgery and pharmacology at the University of Michigan, Ann Arbor, said the results are eerily similar to a 2013 study that he coauthored.
Although the current research is just a single case study, Dr. Mashour said when taken with his team’s findings in rats and other work, the new findings are “starting to put a picture together of what might be going on in the dying brain.”
“They were able to record throughout the process of cardiac arrest and death and what they found was strikingly similar to what we found in our highly controlled animal study,” said Dr. Mashour, who is also the founding director of the Center for Consciousness Science at the University of Michigan.
“There was a surge of higher-frequency activity and there was coherence across different parts of the brain,” he added. “That suggests that what we found in the rigorous controlled setting of a laboratory actually translates to humans who are undergoing the clinical process of dying.”
What remains unclear is whether this brain activity explains the near-death experiences described in the literature, which include “life recall” of memories, Dr. Mashour said. “This higher-frequency surge that’s happening around the time of death, is that correlated with experiencing something like this near-death experience? Or is it just a neural feature that can just as easily happen in an unconscious brain?”
The study was funded by the Heidi Demetriades Foundation, the ETH Zürich Foundation, and the Henan Provincial People’s Hospital Outstanding Talents Founding Grant Project. Dr. Zemmar and Dr. Mashour disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
Although only a single case study, researchers say the recording raises the possibility that as we die, our lives really do flash before our eyes.
“The same neurophysiological activity patterns that occur in our brains when we dream, remember, meditate, concentrate – these same patterns also appear just before we die,” study investigator Ajmal Zemmar, MD, PhD, assistant professor of neurosurgery at the University of Louisville (Ky.), said in an interview.
The research was published online Feb. 22, 2022, in the Frontiers in Aging Neuroscience.
Accidental finding
The recording of brain activity was captured inadvertently in 2016 when neuroscientists used continuous EEG to detect and treat seizures in an 87-year-old man who had developed epilepsy after a traumatic brain injury, While undergoing the EEG, the patient had a cardiac arrest and died.
In the 30 seconds before and after blood flow to the brain stopped, the EEG showed an increase in gamma oscillations. These are brain waves known to be involved in high cognitive functions, including conscious perception and memory flashbacks.
Researchers also noted changes in alpha, theta, delta, and beta wave activity just before and just after cardiac arrest, and that changes in one type modulated changes in others. That suggests a coordinated rhythm, which further suggests the activity is more than just the firing of neurons as they die.
“When you observe this and you observe the rhythmic oscillation, you are inclined to think this may be a coordinated activity pattern of the brain rather than a mere discharge when the brain dies,” Dr. Zemmar said.
Although they’ve had the data since 2016, Dr. Zemmar and colleagues held off on publishing in the hopes of finding similar recordings in other individuals. That their 5-year search yielded no results illustrates just how difficult a study like this is to conduct, Dr. Zemmar noted. “We’re trying to figure out how to do this in a predictable way, but obtaining datasets like this is going to be challenging,” he said.
Although Dr. Zemmar was unable to find recordings of activity in the dying brains of other humans, he did find a similar study conducted with rats in 2013. In that research, investigators reported a surge of brain activity in rats just prior to and immediately after experimental cardiac arrest. Changes in high- and low-frequency brain waves mirrored those documented in the current case study.
Bringing a picture together
Commenting on the new study, George Mashour, MD, PhD, professor and chair of anesthesiology and professor of neurosurgery and pharmacology at the University of Michigan, Ann Arbor, said the results are eerily similar to a 2013 study that he coauthored.
Although the current research is just a single case study, Dr. Mashour said when taken with his team’s findings in rats and other work, the new findings are “starting to put a picture together of what might be going on in the dying brain.”
“They were able to record throughout the process of cardiac arrest and death and what they found was strikingly similar to what we found in our highly controlled animal study,” said Dr. Mashour, who is also the founding director of the Center for Consciousness Science at the University of Michigan.
“There was a surge of higher-frequency activity and there was coherence across different parts of the brain,” he added. “That suggests that what we found in the rigorous controlled setting of a laboratory actually translates to humans who are undergoing the clinical process of dying.”
What remains unclear is whether this brain activity explains the near-death experiences described in the literature, which include “life recall” of memories, Dr. Mashour said. “This higher-frequency surge that’s happening around the time of death, is that correlated with experiencing something like this near-death experience? Or is it just a neural feature that can just as easily happen in an unconscious brain?”
The study was funded by the Heidi Demetriades Foundation, the ETH Zürich Foundation, and the Henan Provincial People’s Hospital Outstanding Talents Founding Grant Project. Dr. Zemmar and Dr. Mashour disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
FROM FRONTIERS IN AGING NEUROSCIENCE
Alarming rates of self-harm in adults with autism expose a broken system
When a recent study from Columbia University reported that suicide and self-harm were nearly four times more likely in adults with autism spectrum disorder (ASD) than in the general population, the findings were sobering. But to many in the field, they were not surprising.
Previous analyses showed individuals with ASD were up to six times more likely to attempt suicide and nearly eight times as likely to succeed. However, the recent study published in JAMA Network Open is one of only a few on self-harm and suicide in autism spectrum disorder (ASD) to include a focus on adults.
“Previously there was relatively little information about adults with autism in general and on injury risk among adults with autism specifically,” study investigator Guohua Li, DrPH, MD, professor of epidemiology at Columbia University Mailman School of Public Health, New York, told this news organization.
“How to continue to provide social support and health care services to adults with autism presents a real challenge to society and is a public health issue,” Dr. Li said.
Falling off a ‘services cliff’
The ASD rate among children is at a record-high in the United States, which means the number of adults on the spectrum will also continue to climb. The incidence of adults with newly diagnosed ASD, who are sometimes described as the “lost generation,” is also increasing. Despite these realities, adults with ASD remain largely underserved and understudied.
The data that are available paint a concerning picture. Adolescents with ASD face a “services cliff” as they transition to adulthood and fall into a landscape with a serious lack of services, support, and clinicians trained to treat adults with ASD.
Compared with young adults without ASD, those on the spectrum have significantly lower college graduation rates, have a harder time finding and keeping a job, are more likely to have a co-occurring mental illness, and are far less likely to live independently.
Before 2020, there were no national data on the number of U.S. adults with autism. That year, the Centers for Disease Control and Prevention released its first-ever report on adult autism prevalence, estimated to be 5.4 million.
That figure is almost definitely low, Matthew Maenner, PhD, autism surveillance team lead with the CDC’s National Center on Birth Defects and Developmental Disabilities, told this news organization.
Researchers use school and medical records to calculate child ASD rates, but counting adults with the disorder is far more difficult.
The CDC’s estimate was based on modeling reports from 2017 state-based population and mortality records and parent-reported survey data of U.S. children diagnosed with ASD. It was inexact, said Dr. Maenner, but it was a start.
“There are no good data on the prevalence of autism in adults. Anywhere,” he added.
Masking and camouflaging
Only about 3.5% of published studies on autism focus on adults, one review showed. In the recently published “The Lancet Commission on the future of care and clinical research in autism,” the section on research on adolescents and adults was a mere 189 words long.
“The brevity of this paragraph reflects the little data available in this area, not its importance” the authors write.
The recent report of higher self-harm risk in adults on the spectrum offers further evidence that “there just aren’t enough services and research on adults on [the] autism spectrum,” Edward S. Brodkin, MD, associate professor of psychiatry and director of the Adult Autism Spectrum Program at the University of Pennsylvania Perelman School of Medicine in Philadelphia, told this news organization.
Founded by Dr. Brodkin in 2013, the program provides ASD diagnostic and support services for adults with ASD. Like others in the field, Dr. Brodkin has noted a sharp increase in the number of previously undiagnosed adults seeking evaluation for possible ASD.
Many of his patients have recently diagnosed children and realized they share some of the same ASD symptoms. Others have long recognized traits common in autism but have engaged in what clinicians call “masking” or “camouflaging.” This is particularly true in women, who are diagnosed with autism at far lower rates than men.
The “lost generation” of adults who receive an ASD diagnosis later in life have a lower quality of life, studies suggest, and have the highest risk for suicide among all individuals with autism.
The recent study from Dr. Li and colleagues offers new evidence in both children and adults. But although the systematic review and meta-analysis of 31 studies showed high rates of self-injurious behavior and suicidality in both groups, Dr. Li said it’s the data on adults that was most alarming.
The OR of suicidality in children was 2.53, but the risk in adults was significantly higher, with an odds ratio (OR) of 3.84.
Adults were at greater risk for self-harm than children (OR, 1.45; 95% confidence interval, 1.04-2.03), with higher odds of self-injurious behavior (OR, 3.38; 95% CI, 2.54-4.50) and suicidality (OR, 3.84; 95% CI, 2.78-5.30), compared with children (OR, 2.99; 95% CI, 1.93-4.64 for self-injurious behavior, and OR, 2.53; 95% CI, 1.70-3.76 for suicidality).
Lightbulb moment?
Commenting for this news organization, Brenna Maddox, PhD, assistant professor of psychiatry at UNC Chapel Hill and co-chair of the American Association of Suicidology’s Autism and Suicide Committee, said “the sad reality” is that these findings won’t be surprising to many who work in the field.
“But for some clinicians and the public, this will be a lightbulb kind of moment, increasing awareness about a problem many of us have been talking about for a while,” said Dr. Maddox, who was not involved with the current research.
In January, she launched a 5-year, $9 million study to compare the efficacy of two suicide intervention programs in adolescents and young adults with autism.
The interventions use a well-known suicide prevention tool that has been newly modified for use in people with autism. One program would rely on the intervention alone, and the other would add a structured clinical follow-up.
“There has to be much more than awareness. We need more training for clinicians, we need more tools, we need to know which tools are going to work,” Dr. Maddox said.
Her new project could address all of those needs. Funded by the nonprofit Patient-Centered Outcomes Research Institute (PCORI), it will train 150 clinicians at centers in four states to identify suicidal risk among young adults with autism, utilize the prevention tool, and collect data on its efficacy alone or with follow-up.
Clinician training will begin this spring, and researchers hope to have the first patient data in the fall.
Scaling the ‘services cliff’
While Dr. Maddox’s study could yield a potential suicide prevention tool, she is quick to point out that the ultimate goal would be to have fewer people reach the point where such a tool is needed. However, that will take a multidisciplinary approach that begins with access to clinical care, including mental health care, she noted.
“Our mental health care system in general is not great for people on the spectrum, but it’s even worse for adults,” Dr. Maddox said.
Compared with neurotypical adults, adults with autism use more mental health services, have higher hospitalization rates, and are more likely to use primary care services, one recent study showed. The problem, Dr. Maddox notes, is that there are too few clinicians in those areas who are trained in autism care.
One way to address that issue is to mandate autism instruction in the medical curriculum, Catherine Lord, PhD, told this news organization when asked for comment. Dr. Lord is cochair of The Lancet commission on the future of care and clinical research in autism and professor of psychiatry at the Semel Institute for Neuroscience and Human Behavior at UCLA.
“Medical schools offer very little training on ASD, even in standard psychiatry training. For people who don’t specialize in child or adolescence psychiatry, there’s almost none,” Dr. Lord said.
Dr. Maddox agrees. One goal of the PCORI study is to turn their findings into a transportable training program, perhaps available via a webinar for clinicians, crisis center staff, and others who may encounter an adult with autism who is contemplating suicide.
“This is a life and death situation,” Dr. Maddox said. “We have to marshal every resource we have, and we have to do it now. We can’t waste time.”
Dr. Li’s study was funded by the Eunice Kennedy Shriver National Institute of Child Health and Human Development of the National Institutes of Health. Study authors and other sources reported no relevant financial relationships.
A version of this article first appeared on Medscape.com.
When a recent study from Columbia University reported that suicide and self-harm were nearly four times more likely in adults with autism spectrum disorder (ASD) than in the general population, the findings were sobering. But to many in the field, they were not surprising.
Previous analyses showed individuals with ASD were up to six times more likely to attempt suicide and nearly eight times as likely to succeed. However, the recent study published in JAMA Network Open is one of only a few on self-harm and suicide in autism spectrum disorder (ASD) to include a focus on adults.
“Previously there was relatively little information about adults with autism in general and on injury risk among adults with autism specifically,” study investigator Guohua Li, DrPH, MD, professor of epidemiology at Columbia University Mailman School of Public Health, New York, told this news organization.
“How to continue to provide social support and health care services to adults with autism presents a real challenge to society and is a public health issue,” Dr. Li said.
Falling off a ‘services cliff’
The ASD rate among children is at a record-high in the United States, which means the number of adults on the spectrum will also continue to climb. The incidence of adults with newly diagnosed ASD, who are sometimes described as the “lost generation,” is also increasing. Despite these realities, adults with ASD remain largely underserved and understudied.
The data that are available paint a concerning picture. Adolescents with ASD face a “services cliff” as they transition to adulthood and fall into a landscape with a serious lack of services, support, and clinicians trained to treat adults with ASD.
Compared with young adults without ASD, those on the spectrum have significantly lower college graduation rates, have a harder time finding and keeping a job, are more likely to have a co-occurring mental illness, and are far less likely to live independently.
Before 2020, there were no national data on the number of U.S. adults with autism. That year, the Centers for Disease Control and Prevention released its first-ever report on adult autism prevalence, estimated to be 5.4 million.
That figure is almost definitely low, Matthew Maenner, PhD, autism surveillance team lead with the CDC’s National Center on Birth Defects and Developmental Disabilities, told this news organization.
Researchers use school and medical records to calculate child ASD rates, but counting adults with the disorder is far more difficult.
The CDC’s estimate was based on modeling reports from 2017 state-based population and mortality records and parent-reported survey data of U.S. children diagnosed with ASD. It was inexact, said Dr. Maenner, but it was a start.
“There are no good data on the prevalence of autism in adults. Anywhere,” he added.
Masking and camouflaging
Only about 3.5% of published studies on autism focus on adults, one review showed. In the recently published “The Lancet Commission on the future of care and clinical research in autism,” the section on research on adolescents and adults was a mere 189 words long.
“The brevity of this paragraph reflects the little data available in this area, not its importance” the authors write.
The recent report of higher self-harm risk in adults on the spectrum offers further evidence that “there just aren’t enough services and research on adults on [the] autism spectrum,” Edward S. Brodkin, MD, associate professor of psychiatry and director of the Adult Autism Spectrum Program at the University of Pennsylvania Perelman School of Medicine in Philadelphia, told this news organization.
Founded by Dr. Brodkin in 2013, the program provides ASD diagnostic and support services for adults with ASD. Like others in the field, Dr. Brodkin has noted a sharp increase in the number of previously undiagnosed adults seeking evaluation for possible ASD.
Many of his patients have recently diagnosed children and realized they share some of the same ASD symptoms. Others have long recognized traits common in autism but have engaged in what clinicians call “masking” or “camouflaging.” This is particularly true in women, who are diagnosed with autism at far lower rates than men.
The “lost generation” of adults who receive an ASD diagnosis later in life have a lower quality of life, studies suggest, and have the highest risk for suicide among all individuals with autism.
The recent study from Dr. Li and colleagues offers new evidence in both children and adults. But although the systematic review and meta-analysis of 31 studies showed high rates of self-injurious behavior and suicidality in both groups, Dr. Li said it’s the data on adults that was most alarming.
The OR of suicidality in children was 2.53, but the risk in adults was significantly higher, with an odds ratio (OR) of 3.84.
Adults were at greater risk for self-harm than children (OR, 1.45; 95% confidence interval, 1.04-2.03), with higher odds of self-injurious behavior (OR, 3.38; 95% CI, 2.54-4.50) and suicidality (OR, 3.84; 95% CI, 2.78-5.30), compared with children (OR, 2.99; 95% CI, 1.93-4.64 for self-injurious behavior, and OR, 2.53; 95% CI, 1.70-3.76 for suicidality).
Lightbulb moment?
Commenting for this news organization, Brenna Maddox, PhD, assistant professor of psychiatry at UNC Chapel Hill and co-chair of the American Association of Suicidology’s Autism and Suicide Committee, said “the sad reality” is that these findings won’t be surprising to many who work in the field.
“But for some clinicians and the public, this will be a lightbulb kind of moment, increasing awareness about a problem many of us have been talking about for a while,” said Dr. Maddox, who was not involved with the current research.
In January, she launched a 5-year, $9 million study to compare the efficacy of two suicide intervention programs in adolescents and young adults with autism.
The interventions use a well-known suicide prevention tool that has been newly modified for use in people with autism. One program would rely on the intervention alone, and the other would add a structured clinical follow-up.
“There has to be much more than awareness. We need more training for clinicians, we need more tools, we need to know which tools are going to work,” Dr. Maddox said.
Her new project could address all of those needs. Funded by the nonprofit Patient-Centered Outcomes Research Institute (PCORI), it will train 150 clinicians at centers in four states to identify suicidal risk among young adults with autism, utilize the prevention tool, and collect data on its efficacy alone or with follow-up.
Clinician training will begin this spring, and researchers hope to have the first patient data in the fall.
Scaling the ‘services cliff’
While Dr. Maddox’s study could yield a potential suicide prevention tool, she is quick to point out that the ultimate goal would be to have fewer people reach the point where such a tool is needed. However, that will take a multidisciplinary approach that begins with access to clinical care, including mental health care, she noted.
“Our mental health care system in general is not great for people on the spectrum, but it’s even worse for adults,” Dr. Maddox said.
Compared with neurotypical adults, adults with autism use more mental health services, have higher hospitalization rates, and are more likely to use primary care services, one recent study showed. The problem, Dr. Maddox notes, is that there are too few clinicians in those areas who are trained in autism care.
One way to address that issue is to mandate autism instruction in the medical curriculum, Catherine Lord, PhD, told this news organization when asked for comment. Dr. Lord is cochair of The Lancet commission on the future of care and clinical research in autism and professor of psychiatry at the Semel Institute for Neuroscience and Human Behavior at UCLA.
“Medical schools offer very little training on ASD, even in standard psychiatry training. For people who don’t specialize in child or adolescence psychiatry, there’s almost none,” Dr. Lord said.
Dr. Maddox agrees. One goal of the PCORI study is to turn their findings into a transportable training program, perhaps available via a webinar for clinicians, crisis center staff, and others who may encounter an adult with autism who is contemplating suicide.
“This is a life and death situation,” Dr. Maddox said. “We have to marshal every resource we have, and we have to do it now. We can’t waste time.”
Dr. Li’s study was funded by the Eunice Kennedy Shriver National Institute of Child Health and Human Development of the National Institutes of Health. Study authors and other sources reported no relevant financial relationships.
A version of this article first appeared on Medscape.com.
When a recent study from Columbia University reported that suicide and self-harm were nearly four times more likely in adults with autism spectrum disorder (ASD) than in the general population, the findings were sobering. But to many in the field, they were not surprising.
Previous analyses showed individuals with ASD were up to six times more likely to attempt suicide and nearly eight times as likely to succeed. However, the recent study published in JAMA Network Open is one of only a few on self-harm and suicide in autism spectrum disorder (ASD) to include a focus on adults.
“Previously there was relatively little information about adults with autism in general and on injury risk among adults with autism specifically,” study investigator Guohua Li, DrPH, MD, professor of epidemiology at Columbia University Mailman School of Public Health, New York, told this news organization.
“How to continue to provide social support and health care services to adults with autism presents a real challenge to society and is a public health issue,” Dr. Li said.
Falling off a ‘services cliff’
The ASD rate among children is at a record-high in the United States, which means the number of adults on the spectrum will also continue to climb. The incidence of adults with newly diagnosed ASD, who are sometimes described as the “lost generation,” is also increasing. Despite these realities, adults with ASD remain largely underserved and understudied.
The data that are available paint a concerning picture. Adolescents with ASD face a “services cliff” as they transition to adulthood and fall into a landscape with a serious lack of services, support, and clinicians trained to treat adults with ASD.
Compared with young adults without ASD, those on the spectrum have significantly lower college graduation rates, have a harder time finding and keeping a job, are more likely to have a co-occurring mental illness, and are far less likely to live independently.
Before 2020, there were no national data on the number of U.S. adults with autism. That year, the Centers for Disease Control and Prevention released its first-ever report on adult autism prevalence, estimated to be 5.4 million.
That figure is almost definitely low, Matthew Maenner, PhD, autism surveillance team lead with the CDC’s National Center on Birth Defects and Developmental Disabilities, told this news organization.
Researchers use school and medical records to calculate child ASD rates, but counting adults with the disorder is far more difficult.
The CDC’s estimate was based on modeling reports from 2017 state-based population and mortality records and parent-reported survey data of U.S. children diagnosed with ASD. It was inexact, said Dr. Maenner, but it was a start.
“There are no good data on the prevalence of autism in adults. Anywhere,” he added.
Masking and camouflaging
Only about 3.5% of published studies on autism focus on adults, one review showed. In the recently published “The Lancet Commission on the future of care and clinical research in autism,” the section on research on adolescents and adults was a mere 189 words long.
“The brevity of this paragraph reflects the little data available in this area, not its importance” the authors write.
The recent report of higher self-harm risk in adults on the spectrum offers further evidence that “there just aren’t enough services and research on adults on [the] autism spectrum,” Edward S. Brodkin, MD, associate professor of psychiatry and director of the Adult Autism Spectrum Program at the University of Pennsylvania Perelman School of Medicine in Philadelphia, told this news organization.
Founded by Dr. Brodkin in 2013, the program provides ASD diagnostic and support services for adults with ASD. Like others in the field, Dr. Brodkin has noted a sharp increase in the number of previously undiagnosed adults seeking evaluation for possible ASD.
Many of his patients have recently diagnosed children and realized they share some of the same ASD symptoms. Others have long recognized traits common in autism but have engaged in what clinicians call “masking” or “camouflaging.” This is particularly true in women, who are diagnosed with autism at far lower rates than men.
The “lost generation” of adults who receive an ASD diagnosis later in life have a lower quality of life, studies suggest, and have the highest risk for suicide among all individuals with autism.
The recent study from Dr. Li and colleagues offers new evidence in both children and adults. But although the systematic review and meta-analysis of 31 studies showed high rates of self-injurious behavior and suicidality in both groups, Dr. Li said it’s the data on adults that was most alarming.
The OR of suicidality in children was 2.53, but the risk in adults was significantly higher, with an odds ratio (OR) of 3.84.
Adults were at greater risk for self-harm than children (OR, 1.45; 95% confidence interval, 1.04-2.03), with higher odds of self-injurious behavior (OR, 3.38; 95% CI, 2.54-4.50) and suicidality (OR, 3.84; 95% CI, 2.78-5.30), compared with children (OR, 2.99; 95% CI, 1.93-4.64 for self-injurious behavior, and OR, 2.53; 95% CI, 1.70-3.76 for suicidality).
Lightbulb moment?
Commenting for this news organization, Brenna Maddox, PhD, assistant professor of psychiatry at UNC Chapel Hill and co-chair of the American Association of Suicidology’s Autism and Suicide Committee, said “the sad reality” is that these findings won’t be surprising to many who work in the field.
“But for some clinicians and the public, this will be a lightbulb kind of moment, increasing awareness about a problem many of us have been talking about for a while,” said Dr. Maddox, who was not involved with the current research.
In January, she launched a 5-year, $9 million study to compare the efficacy of two suicide intervention programs in adolescents and young adults with autism.
The interventions use a well-known suicide prevention tool that has been newly modified for use in people with autism. One program would rely on the intervention alone, and the other would add a structured clinical follow-up.
“There has to be much more than awareness. We need more training for clinicians, we need more tools, we need to know which tools are going to work,” Dr. Maddox said.
Her new project could address all of those needs. Funded by the nonprofit Patient-Centered Outcomes Research Institute (PCORI), it will train 150 clinicians at centers in four states to identify suicidal risk among young adults with autism, utilize the prevention tool, and collect data on its efficacy alone or with follow-up.
Clinician training will begin this spring, and researchers hope to have the first patient data in the fall.
Scaling the ‘services cliff’
While Dr. Maddox’s study could yield a potential suicide prevention tool, she is quick to point out that the ultimate goal would be to have fewer people reach the point where such a tool is needed. However, that will take a multidisciplinary approach that begins with access to clinical care, including mental health care, she noted.
“Our mental health care system in general is not great for people on the spectrum, but it’s even worse for adults,” Dr. Maddox said.
Compared with neurotypical adults, adults with autism use more mental health services, have higher hospitalization rates, and are more likely to use primary care services, one recent study showed. The problem, Dr. Maddox notes, is that there are too few clinicians in those areas who are trained in autism care.
One way to address that issue is to mandate autism instruction in the medical curriculum, Catherine Lord, PhD, told this news organization when asked for comment. Dr. Lord is cochair of The Lancet commission on the future of care and clinical research in autism and professor of psychiatry at the Semel Institute for Neuroscience and Human Behavior at UCLA.
“Medical schools offer very little training on ASD, even in standard psychiatry training. For people who don’t specialize in child or adolescence psychiatry, there’s almost none,” Dr. Lord said.
Dr. Maddox agrees. One goal of the PCORI study is to turn their findings into a transportable training program, perhaps available via a webinar for clinicians, crisis center staff, and others who may encounter an adult with autism who is contemplating suicide.
“This is a life and death situation,” Dr. Maddox said. “We have to marshal every resource we have, and we have to do it now. We can’t waste time.”
Dr. Li’s study was funded by the Eunice Kennedy Shriver National Institute of Child Health and Human Development of the National Institutes of Health. Study authors and other sources reported no relevant financial relationships.
A version of this article first appeared on Medscape.com.
Global dementia cases may triple by 2050 unless risk factors are reduced
new research suggests.
Results from a study of 195 countries and territories estimates that by 2050, 153 million people are expected to have dementia worldwide – up from 57 million in 2019. In the United States, the number is expected to increase 100%, from an estimated 5.3 million in 2019 to 10.5 million in 2050.
The increase is largely driven by population growth and population aging, but researchers noted that expanding access to education and addressing risk factors such as obesity, high blood sugar, and smoking could blunt the rise in cases.
The study predicts increases in dementia in every country included in the analysis. The sharpest rise is expected in north Africa and the Middle East (367%) and sub-Saharan Africa (357%). The smallest increases will be in high-income countries in Asia Pacific (53%) and western Europe (74%).
Although the United States had the 37th lowest percentage increase across all countries considered, “this expected increase is still large and requires attention from policy and decision-makers,” said coinvestigator Emma Nichols, MPH, a researcher with the Institute for Health Metrics and Evaluation at the University of Washington, Seattle.
The findings were published online Jan. 6, 2022, in The Lancet Public Health (doi: 10.1016/S2468-2667[21]00249-8).
Dementia prevalence
For the study, researchers used country-specific estimates of dementia prevalence from the Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2019 study to project dementia prevalence globally, by world region, and at the country level.
They also used information on projected trends in four important dementia risk factors (high body mass index, high fasting plasma glucose, smoking, and education) to estimate how changes in these risk factors might impact dementia prevalence between 2019 and 2050.
Despite large increases in the projected number of people living with dementia, age-standardized both-sex prevalence remained stable between 2019 and 2050, with a global percentage change of 0.1% (95% uncertainty interval, –7.5 to 10.8).
Dementia prevalence was higher in women than in men and increased with age, doubling about every 5 years until 85 years of age in both 2019 and 2050 (female-to-male ratio, 1.67; 95% UI, 1.52-1.85).
Projected increases in cases could largely be attributed to population growth and population aging, although their relative importance varied by world region. Population growth contributed most to the increases in sub-Saharan Africa and population aging contributed most to the increases in east Asia.
The countries with the highest expected percentage change in total number of dementia cases between 2019 and 2050 were: Qatar (1,926%), United Arab Emirates (1,795%), Bahrain (1,084%), Oman (943%), Saudi Arabia (898%), Kuwait (850%), Iraq (559%), Maldives (554%), Jordan (522%), and Equatorial Guinea (498%).
The countries with the lowest expected percentage change in total number of dementia cases between 2019 and 2050 were Japan (27%), Bulgaria (37%), Serbia (38%), Lithuania (44%), Greece (45%), Latvia (47%), Croatia (55%), Ukraine (55%), Italy (56%), and Finland (58%).
Modifiable risk factors
Researchers also calculated how changes in risk factors might affect dementia prevalence. They found that improvements in global education access would reduce dementia prevalence by an estimated 6.2 million cases worldwide by 2050. However, that decrease would be offset by expected increases in obesity, high blood sugar, and smoking, which investigators estimate will result in an additional 6.8 million dementia cases.
The projections are based on expected trends in population aging, population growth, and risk factor trajectories, but “projections could change if effective interventions for modifiable risk factors are developed and deployed,” Ms. Nichols said.
In 2020, the Lancet Commission on Dementia Prevention, Intervention, and Care issued an update of its 2017 report, identifying 12 modifiable risk factors that could delay or prevent 40% of dementia cases. The risk factors were low education, hypertension, hearing impairment, smoking, midlife obesity, depression, physical inactivity, diabetes, social isolation, excessive alcohol consumption, head injury, and air pollution.
“Countries, including the U.S., should look to develop effective interventions for modifiable risk factors, but also should invest in the resources needed to support those with dementia and their caregivers,” Ms. Nichols said. She added that additional support for research and resources to develop therapeutic interventions is also warranted.
Oversimplifying mechanisms?
In an accompanying commentary, Michaël Schwarzinger, MD, and Carole Dufouil, PhD, of Bordeaux (France) University Hospital, noted that the authors’ efforts to build on GBD 2019 oversimplify the underlying mechanisms that cause dementia. The authors “provide somehow apocalyptic projections that do not factor in advisable changes in lifestyle over the lifetime,” they wrote.
“There is a considerable and urgent need to reinforce a public health approach towards dementia to better inform the people and decision-makers about the appropriate means to delay or avoid these dire projections,” the editorialists added.
The study was funded by the Bill and Melinda Gates Foundation and Gates Ventures. Ms. Nichols and the editorialists disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
new research suggests.
Results from a study of 195 countries and territories estimates that by 2050, 153 million people are expected to have dementia worldwide – up from 57 million in 2019. In the United States, the number is expected to increase 100%, from an estimated 5.3 million in 2019 to 10.5 million in 2050.
The increase is largely driven by population growth and population aging, but researchers noted that expanding access to education and addressing risk factors such as obesity, high blood sugar, and smoking could blunt the rise in cases.
The study predicts increases in dementia in every country included in the analysis. The sharpest rise is expected in north Africa and the Middle East (367%) and sub-Saharan Africa (357%). The smallest increases will be in high-income countries in Asia Pacific (53%) and western Europe (74%).
Although the United States had the 37th lowest percentage increase across all countries considered, “this expected increase is still large and requires attention from policy and decision-makers,” said coinvestigator Emma Nichols, MPH, a researcher with the Institute for Health Metrics and Evaluation at the University of Washington, Seattle.
The findings were published online Jan. 6, 2022, in The Lancet Public Health (doi: 10.1016/S2468-2667[21]00249-8).
Dementia prevalence
For the study, researchers used country-specific estimates of dementia prevalence from the Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2019 study to project dementia prevalence globally, by world region, and at the country level.
They also used information on projected trends in four important dementia risk factors (high body mass index, high fasting plasma glucose, smoking, and education) to estimate how changes in these risk factors might impact dementia prevalence between 2019 and 2050.
Despite large increases in the projected number of people living with dementia, age-standardized both-sex prevalence remained stable between 2019 and 2050, with a global percentage change of 0.1% (95% uncertainty interval, –7.5 to 10.8).
Dementia prevalence was higher in women than in men and increased with age, doubling about every 5 years until 85 years of age in both 2019 and 2050 (female-to-male ratio, 1.67; 95% UI, 1.52-1.85).
Projected increases in cases could largely be attributed to population growth and population aging, although their relative importance varied by world region. Population growth contributed most to the increases in sub-Saharan Africa and population aging contributed most to the increases in east Asia.
The countries with the highest expected percentage change in total number of dementia cases between 2019 and 2050 were: Qatar (1,926%), United Arab Emirates (1,795%), Bahrain (1,084%), Oman (943%), Saudi Arabia (898%), Kuwait (850%), Iraq (559%), Maldives (554%), Jordan (522%), and Equatorial Guinea (498%).
The countries with the lowest expected percentage change in total number of dementia cases between 2019 and 2050 were Japan (27%), Bulgaria (37%), Serbia (38%), Lithuania (44%), Greece (45%), Latvia (47%), Croatia (55%), Ukraine (55%), Italy (56%), and Finland (58%).
Modifiable risk factors
Researchers also calculated how changes in risk factors might affect dementia prevalence. They found that improvements in global education access would reduce dementia prevalence by an estimated 6.2 million cases worldwide by 2050. However, that decrease would be offset by expected increases in obesity, high blood sugar, and smoking, which investigators estimate will result in an additional 6.8 million dementia cases.
The projections are based on expected trends in population aging, population growth, and risk factor trajectories, but “projections could change if effective interventions for modifiable risk factors are developed and deployed,” Ms. Nichols said.
In 2020, the Lancet Commission on Dementia Prevention, Intervention, and Care issued an update of its 2017 report, identifying 12 modifiable risk factors that could delay or prevent 40% of dementia cases. The risk factors were low education, hypertension, hearing impairment, smoking, midlife obesity, depression, physical inactivity, diabetes, social isolation, excessive alcohol consumption, head injury, and air pollution.
“Countries, including the U.S., should look to develop effective interventions for modifiable risk factors, but also should invest in the resources needed to support those with dementia and their caregivers,” Ms. Nichols said. She added that additional support for research and resources to develop therapeutic interventions is also warranted.
Oversimplifying mechanisms?
In an accompanying commentary, Michaël Schwarzinger, MD, and Carole Dufouil, PhD, of Bordeaux (France) University Hospital, noted that the authors’ efforts to build on GBD 2019 oversimplify the underlying mechanisms that cause dementia. The authors “provide somehow apocalyptic projections that do not factor in advisable changes in lifestyle over the lifetime,” they wrote.
“There is a considerable and urgent need to reinforce a public health approach towards dementia to better inform the people and decision-makers about the appropriate means to delay or avoid these dire projections,” the editorialists added.
The study was funded by the Bill and Melinda Gates Foundation and Gates Ventures. Ms. Nichols and the editorialists disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
new research suggests.
Results from a study of 195 countries and territories estimates that by 2050, 153 million people are expected to have dementia worldwide – up from 57 million in 2019. In the United States, the number is expected to increase 100%, from an estimated 5.3 million in 2019 to 10.5 million in 2050.
The increase is largely driven by population growth and population aging, but researchers noted that expanding access to education and addressing risk factors such as obesity, high blood sugar, and smoking could blunt the rise in cases.
The study predicts increases in dementia in every country included in the analysis. The sharpest rise is expected in north Africa and the Middle East (367%) and sub-Saharan Africa (357%). The smallest increases will be in high-income countries in Asia Pacific (53%) and western Europe (74%).
Although the United States had the 37th lowest percentage increase across all countries considered, “this expected increase is still large and requires attention from policy and decision-makers,” said coinvestigator Emma Nichols, MPH, a researcher with the Institute for Health Metrics and Evaluation at the University of Washington, Seattle.
The findings were published online Jan. 6, 2022, in The Lancet Public Health (doi: 10.1016/S2468-2667[21]00249-8).
Dementia prevalence
For the study, researchers used country-specific estimates of dementia prevalence from the Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2019 study to project dementia prevalence globally, by world region, and at the country level.
They also used information on projected trends in four important dementia risk factors (high body mass index, high fasting plasma glucose, smoking, and education) to estimate how changes in these risk factors might impact dementia prevalence between 2019 and 2050.
Despite large increases in the projected number of people living with dementia, age-standardized both-sex prevalence remained stable between 2019 and 2050, with a global percentage change of 0.1% (95% uncertainty interval, –7.5 to 10.8).
Dementia prevalence was higher in women than in men and increased with age, doubling about every 5 years until 85 years of age in both 2019 and 2050 (female-to-male ratio, 1.67; 95% UI, 1.52-1.85).
Projected increases in cases could largely be attributed to population growth and population aging, although their relative importance varied by world region. Population growth contributed most to the increases in sub-Saharan Africa and population aging contributed most to the increases in east Asia.
The countries with the highest expected percentage change in total number of dementia cases between 2019 and 2050 were: Qatar (1,926%), United Arab Emirates (1,795%), Bahrain (1,084%), Oman (943%), Saudi Arabia (898%), Kuwait (850%), Iraq (559%), Maldives (554%), Jordan (522%), and Equatorial Guinea (498%).
The countries with the lowest expected percentage change in total number of dementia cases between 2019 and 2050 were Japan (27%), Bulgaria (37%), Serbia (38%), Lithuania (44%), Greece (45%), Latvia (47%), Croatia (55%), Ukraine (55%), Italy (56%), and Finland (58%).
Modifiable risk factors
Researchers also calculated how changes in risk factors might affect dementia prevalence. They found that improvements in global education access would reduce dementia prevalence by an estimated 6.2 million cases worldwide by 2050. However, that decrease would be offset by expected increases in obesity, high blood sugar, and smoking, which investigators estimate will result in an additional 6.8 million dementia cases.
The projections are based on expected trends in population aging, population growth, and risk factor trajectories, but “projections could change if effective interventions for modifiable risk factors are developed and deployed,” Ms. Nichols said.
In 2020, the Lancet Commission on Dementia Prevention, Intervention, and Care issued an update of its 2017 report, identifying 12 modifiable risk factors that could delay or prevent 40% of dementia cases. The risk factors were low education, hypertension, hearing impairment, smoking, midlife obesity, depression, physical inactivity, diabetes, social isolation, excessive alcohol consumption, head injury, and air pollution.
“Countries, including the U.S., should look to develop effective interventions for modifiable risk factors, but also should invest in the resources needed to support those with dementia and their caregivers,” Ms. Nichols said. She added that additional support for research and resources to develop therapeutic interventions is also warranted.
Oversimplifying mechanisms?
In an accompanying commentary, Michaël Schwarzinger, MD, and Carole Dufouil, PhD, of Bordeaux (France) University Hospital, noted that the authors’ efforts to build on GBD 2019 oversimplify the underlying mechanisms that cause dementia. The authors “provide somehow apocalyptic projections that do not factor in advisable changes in lifestyle over the lifetime,” they wrote.
“There is a considerable and urgent need to reinforce a public health approach towards dementia to better inform the people and decision-makers about the appropriate means to delay or avoid these dire projections,” the editorialists added.
The study was funded by the Bill and Melinda Gates Foundation and Gates Ventures. Ms. Nichols and the editorialists disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
FROM THE LANCET PUBLIC HEALTH
Schizophrenia linked to violent behavior, but experts push back
A new meta-analysis suggests the risk for violence is higher in patients with schizophrenia, but some experts beg to differ, calling out study limitations and urging caution when interpreting the findings.
The study suggests patients with schizophrenia spectrum disorder (SSD) are 4.5 times more likely than individuals in the general population to perpetrate violence against others.
While the results showed comorbid substance misuse was associated with a significantly increased risk for violence in those with SSD, data on medication nonadherence, prior exposure to violence, childhood trauma, or other known risk factors were not included in the study.
“I think one of the main implications of this study is that prevention of violence outcomes really should be a focus for clinical services, because these are important outcomes to prevent and many of the factors that increase risk are modifiable, such as substance misuse and treatment adherence,” study coinvestigator Seena Fazel, MD, professor of forensic psychiatry at the University of Oxford (England), said in an interview.
Still, some experts urge caution when interpreting the findings, which they fear could perpetuate stigma against individuals with serious mental illness if not taken in the context of a study that shows association, not causation.
“While potential for violence is certainly a relevant consideration in assessing persons with schizophrenia spectrum disorder, professor emeritus of psychiatry at the State University of New York, Syracuse, who commented on the findings.
The findings were published online Dec. 22, 2021, in JAMA Psychiatry.
No causal link
The meta-analysis included 24 studies involving 51,309 individuals with SSD from 15 countries over 4 decades.
Risk for violence perpetrated by men with schizophrenia was 4.5 times higher (95% confidence interval, 3.6-5.6) than their counterparts in the general population. Among women, the rate was 10.2 times higher (95% CI, 7.1-14.6) versus those without SSD.
The odds of perpetrating sexual offenses (odds ratio, 5.1; 95% CI, 3.8-6.8) and homicide (OR, 17.7; 95% CI, 13.9-22.6) were also increased.
When restricting analysis to studies that used outcomes only from register-based sources, indicating a criminal arrest or conviction, absolute risks of violence perpetration ranged from 2.3% to 24.7% in men with SSD and from 0% to 5.4% in women up to a 35-year follow-up.
“That means that over a 35-year period most men are not going to be involved in these criminal register-based violent outcomes,” Dr. Fazel said. “And at least 90% of the women are not going to have any register-based violent outcomes.”
When accounting for substance use comorbidity, risk for violence perpetration dropped sharply. Those with no substance misuse were 3.5 times more likely than those in the general population to commit acts of violence versus 9.9 times in those with substance misuse comorbidity.
“In these subgroup studies of people with dual diagnoses of schizophrenia and substance misuse, the risk was increased 10-fold,” Dr. Fazel said. “If you look at people without substance misuse comorbidity, there remains a risk there of between three- to fourfold increase. It doesn’t explain the association completely.”
The investigators were quick to point out that this new study identifies an association between SSD and violence, and not causation.
“One important way to consider the association is to think of clinical services for people presenting with a schizophrenia spectrum disorder: Does the evidence suggest that violence is an important enough potential adverse outcome, for a minority of those individuals, such that support for this clinical need should be improved?” study investigator Daniel Whiting, BM BCh, a doctoral research fellow in psychiatry at the University of Oxford, said in an interview. “We highlight this as an implication of the findings.”
Whether the association would change if researchers controlled for substance misuse in both the study and control groups is unknown. Also unclear from this study is what impact other risk factors may have on increasing violent outcomes in individuals with SSD.
Education, treatment adherence important
Dr. Pies pointed out that, “notably, the risk for violence in the study population declined more than sixfold when comorbid substance abuse was excluded from the analysis.”
That aligns with an earlier study conducted in Sweden by Dr. Fazel, which showed that, after controlling for substance misuse, the rate of violent crime among individuals with schizophrenia was only slightly higher than in the general population.
“The fact is that people with schizophrenia who are compliant with proper medication do not commit violent acts any more than those in the general population,” Lynn DeLisi, MD, professor of psychiatry at Harvard Medical School, Boston, and founding editor of Schizophrenia Research, said in a comment.
Indeed, Dr. Fazel’s own research suggests treatment with antipsychotics cuts in half the risk for violent crime by patients with severe mental illness.
“The goal should be education of school officials, families, and primary care physicians to detect this illness early and treat it. Programs that make sure patients comply with medication once they begin it are equally important,” Dr. DeLisi said.
Treatment adherence is important, but the first step toward violence prevention is high-quality risk assessment, said Dr. Fazel. His research team has developed a web-based, free risk calculator shown to help clinicians evaluate the risk that a patient might become violent.
Dr. Pies agreed with the importance of comprehensive, clinical assessments of modifiable risk factors, including substance use, homelessness, medication adherence, and conflictual relationships.
This kind of assessment, “in my experience, is rarely carried out in most evaluations of persons with psychotic symptoms or SSD,” he said.
Perpetuating stigma?
Another concern raised by Dr. Pies and Dr. DeLisi is how the findings might perpetuate stigma toward individuals with serious mental illness. Results from a recently published study showed that, although attitudes toward those with major depression have improved in the United States over the past few decades, stigma toward those with schizophrenia has actually worsened.
The most effective approach to reducing stigma is to “face up to the evidence, then try and prevent the negative outcomes,” Dr. Fazel said.
“The conclusion of this paper is that it’s all pointing toward a strategy toward prevention by developing high-quality risk assessment and then developing high-quality treatment programs that include not just pharmacological treatments but psychosocial treatments and beyond,” he added. “We know that’s the way it works for other disorders as well.”
Although mental illness stigma is a serious problem, Dr. Pies noted, “the risk is not so much that studies of this sort are carried out and then covered in the media, but that they are decontextualized and reduced to ‘bumper sticker’ headlines.”
“The public needs context and perspective,” he said. “It needs to be informed that violent behavior is relatively rare among persons with psychiatric illness, including persons with schizophrenia and related disorders who do not also have a substance use disorder.”
Indeed, some studies have shown that individuals with mental illness are more often the victims of violence than the perpetrators.
“Frankly, the public is much more at risk from the neighborhood lout who drinks heavily and repeatedly starts bar fights than from the average patient with a schizophrenia spectrum disorder,” Dr. Pies said.
Dr. Fazel reported receiving funding from the Wellcome Trust. Dr. DeLisi and Dr. Pies disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
A new meta-analysis suggests the risk for violence is higher in patients with schizophrenia, but some experts beg to differ, calling out study limitations and urging caution when interpreting the findings.
The study suggests patients with schizophrenia spectrum disorder (SSD) are 4.5 times more likely than individuals in the general population to perpetrate violence against others.
While the results showed comorbid substance misuse was associated with a significantly increased risk for violence in those with SSD, data on medication nonadherence, prior exposure to violence, childhood trauma, or other known risk factors were not included in the study.
“I think one of the main implications of this study is that prevention of violence outcomes really should be a focus for clinical services, because these are important outcomes to prevent and many of the factors that increase risk are modifiable, such as substance misuse and treatment adherence,” study coinvestigator Seena Fazel, MD, professor of forensic psychiatry at the University of Oxford (England), said in an interview.
Still, some experts urge caution when interpreting the findings, which they fear could perpetuate stigma against individuals with serious mental illness if not taken in the context of a study that shows association, not causation.
“While potential for violence is certainly a relevant consideration in assessing persons with schizophrenia spectrum disorder, professor emeritus of psychiatry at the State University of New York, Syracuse, who commented on the findings.
The findings were published online Dec. 22, 2021, in JAMA Psychiatry.
No causal link
The meta-analysis included 24 studies involving 51,309 individuals with SSD from 15 countries over 4 decades.
Risk for violence perpetrated by men with schizophrenia was 4.5 times higher (95% confidence interval, 3.6-5.6) than their counterparts in the general population. Among women, the rate was 10.2 times higher (95% CI, 7.1-14.6) versus those without SSD.
The odds of perpetrating sexual offenses (odds ratio, 5.1; 95% CI, 3.8-6.8) and homicide (OR, 17.7; 95% CI, 13.9-22.6) were also increased.
When restricting analysis to studies that used outcomes only from register-based sources, indicating a criminal arrest or conviction, absolute risks of violence perpetration ranged from 2.3% to 24.7% in men with SSD and from 0% to 5.4% in women up to a 35-year follow-up.
“That means that over a 35-year period most men are not going to be involved in these criminal register-based violent outcomes,” Dr. Fazel said. “And at least 90% of the women are not going to have any register-based violent outcomes.”
When accounting for substance use comorbidity, risk for violence perpetration dropped sharply. Those with no substance misuse were 3.5 times more likely than those in the general population to commit acts of violence versus 9.9 times in those with substance misuse comorbidity.
“In these subgroup studies of people with dual diagnoses of schizophrenia and substance misuse, the risk was increased 10-fold,” Dr. Fazel said. “If you look at people without substance misuse comorbidity, there remains a risk there of between three- to fourfold increase. It doesn’t explain the association completely.”
The investigators were quick to point out that this new study identifies an association between SSD and violence, and not causation.
“One important way to consider the association is to think of clinical services for people presenting with a schizophrenia spectrum disorder: Does the evidence suggest that violence is an important enough potential adverse outcome, for a minority of those individuals, such that support for this clinical need should be improved?” study investigator Daniel Whiting, BM BCh, a doctoral research fellow in psychiatry at the University of Oxford, said in an interview. “We highlight this as an implication of the findings.”
Whether the association would change if researchers controlled for substance misuse in both the study and control groups is unknown. Also unclear from this study is what impact other risk factors may have on increasing violent outcomes in individuals with SSD.
Education, treatment adherence important
Dr. Pies pointed out that, “notably, the risk for violence in the study population declined more than sixfold when comorbid substance abuse was excluded from the analysis.”
That aligns with an earlier study conducted in Sweden by Dr. Fazel, which showed that, after controlling for substance misuse, the rate of violent crime among individuals with schizophrenia was only slightly higher than in the general population.
“The fact is that people with schizophrenia who are compliant with proper medication do not commit violent acts any more than those in the general population,” Lynn DeLisi, MD, professor of psychiatry at Harvard Medical School, Boston, and founding editor of Schizophrenia Research, said in a comment.
Indeed, Dr. Fazel’s own research suggests treatment with antipsychotics cuts in half the risk for violent crime by patients with severe mental illness.
“The goal should be education of school officials, families, and primary care physicians to detect this illness early and treat it. Programs that make sure patients comply with medication once they begin it are equally important,” Dr. DeLisi said.
Treatment adherence is important, but the first step toward violence prevention is high-quality risk assessment, said Dr. Fazel. His research team has developed a web-based, free risk calculator shown to help clinicians evaluate the risk that a patient might become violent.
Dr. Pies agreed with the importance of comprehensive, clinical assessments of modifiable risk factors, including substance use, homelessness, medication adherence, and conflictual relationships.
This kind of assessment, “in my experience, is rarely carried out in most evaluations of persons with psychotic symptoms or SSD,” he said.
Perpetuating stigma?
Another concern raised by Dr. Pies and Dr. DeLisi is how the findings might perpetuate stigma toward individuals with serious mental illness. Results from a recently published study showed that, although attitudes toward those with major depression have improved in the United States over the past few decades, stigma toward those with schizophrenia has actually worsened.
The most effective approach to reducing stigma is to “face up to the evidence, then try and prevent the negative outcomes,” Dr. Fazel said.
“The conclusion of this paper is that it’s all pointing toward a strategy toward prevention by developing high-quality risk assessment and then developing high-quality treatment programs that include not just pharmacological treatments but psychosocial treatments and beyond,” he added. “We know that’s the way it works for other disorders as well.”
Although mental illness stigma is a serious problem, Dr. Pies noted, “the risk is not so much that studies of this sort are carried out and then covered in the media, but that they are decontextualized and reduced to ‘bumper sticker’ headlines.”
“The public needs context and perspective,” he said. “It needs to be informed that violent behavior is relatively rare among persons with psychiatric illness, including persons with schizophrenia and related disorders who do not also have a substance use disorder.”
Indeed, some studies have shown that individuals with mental illness are more often the victims of violence than the perpetrators.
“Frankly, the public is much more at risk from the neighborhood lout who drinks heavily and repeatedly starts bar fights than from the average patient with a schizophrenia spectrum disorder,” Dr. Pies said.
Dr. Fazel reported receiving funding from the Wellcome Trust. Dr. DeLisi and Dr. Pies disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
A new meta-analysis suggests the risk for violence is higher in patients with schizophrenia, but some experts beg to differ, calling out study limitations and urging caution when interpreting the findings.
The study suggests patients with schizophrenia spectrum disorder (SSD) are 4.5 times more likely than individuals in the general population to perpetrate violence against others.
While the results showed comorbid substance misuse was associated with a significantly increased risk for violence in those with SSD, data on medication nonadherence, prior exposure to violence, childhood trauma, or other known risk factors were not included in the study.
“I think one of the main implications of this study is that prevention of violence outcomes really should be a focus for clinical services, because these are important outcomes to prevent and many of the factors that increase risk are modifiable, such as substance misuse and treatment adherence,” study coinvestigator Seena Fazel, MD, professor of forensic psychiatry at the University of Oxford (England), said in an interview.
Still, some experts urge caution when interpreting the findings, which they fear could perpetuate stigma against individuals with serious mental illness if not taken in the context of a study that shows association, not causation.
“While potential for violence is certainly a relevant consideration in assessing persons with schizophrenia spectrum disorder, professor emeritus of psychiatry at the State University of New York, Syracuse, who commented on the findings.
The findings were published online Dec. 22, 2021, in JAMA Psychiatry.
No causal link
The meta-analysis included 24 studies involving 51,309 individuals with SSD from 15 countries over 4 decades.
Risk for violence perpetrated by men with schizophrenia was 4.5 times higher (95% confidence interval, 3.6-5.6) than their counterparts in the general population. Among women, the rate was 10.2 times higher (95% CI, 7.1-14.6) versus those without SSD.
The odds of perpetrating sexual offenses (odds ratio, 5.1; 95% CI, 3.8-6.8) and homicide (OR, 17.7; 95% CI, 13.9-22.6) were also increased.
When restricting analysis to studies that used outcomes only from register-based sources, indicating a criminal arrest or conviction, absolute risks of violence perpetration ranged from 2.3% to 24.7% in men with SSD and from 0% to 5.4% in women up to a 35-year follow-up.
“That means that over a 35-year period most men are not going to be involved in these criminal register-based violent outcomes,” Dr. Fazel said. “And at least 90% of the women are not going to have any register-based violent outcomes.”
When accounting for substance use comorbidity, risk for violence perpetration dropped sharply. Those with no substance misuse were 3.5 times more likely than those in the general population to commit acts of violence versus 9.9 times in those with substance misuse comorbidity.
“In these subgroup studies of people with dual diagnoses of schizophrenia and substance misuse, the risk was increased 10-fold,” Dr. Fazel said. “If you look at people without substance misuse comorbidity, there remains a risk there of between three- to fourfold increase. It doesn’t explain the association completely.”
The investigators were quick to point out that this new study identifies an association between SSD and violence, and not causation.
“One important way to consider the association is to think of clinical services for people presenting with a schizophrenia spectrum disorder: Does the evidence suggest that violence is an important enough potential adverse outcome, for a minority of those individuals, such that support for this clinical need should be improved?” study investigator Daniel Whiting, BM BCh, a doctoral research fellow in psychiatry at the University of Oxford, said in an interview. “We highlight this as an implication of the findings.”
Whether the association would change if researchers controlled for substance misuse in both the study and control groups is unknown. Also unclear from this study is what impact other risk factors may have on increasing violent outcomes in individuals with SSD.
Education, treatment adherence important
Dr. Pies pointed out that, “notably, the risk for violence in the study population declined more than sixfold when comorbid substance abuse was excluded from the analysis.”
That aligns with an earlier study conducted in Sweden by Dr. Fazel, which showed that, after controlling for substance misuse, the rate of violent crime among individuals with schizophrenia was only slightly higher than in the general population.
“The fact is that people with schizophrenia who are compliant with proper medication do not commit violent acts any more than those in the general population,” Lynn DeLisi, MD, professor of psychiatry at Harvard Medical School, Boston, and founding editor of Schizophrenia Research, said in a comment.
Indeed, Dr. Fazel’s own research suggests treatment with antipsychotics cuts in half the risk for violent crime by patients with severe mental illness.
“The goal should be education of school officials, families, and primary care physicians to detect this illness early and treat it. Programs that make sure patients comply with medication once they begin it are equally important,” Dr. DeLisi said.
Treatment adherence is important, but the first step toward violence prevention is high-quality risk assessment, said Dr. Fazel. His research team has developed a web-based, free risk calculator shown to help clinicians evaluate the risk that a patient might become violent.
Dr. Pies agreed with the importance of comprehensive, clinical assessments of modifiable risk factors, including substance use, homelessness, medication adherence, and conflictual relationships.
This kind of assessment, “in my experience, is rarely carried out in most evaluations of persons with psychotic symptoms or SSD,” he said.
Perpetuating stigma?
Another concern raised by Dr. Pies and Dr. DeLisi is how the findings might perpetuate stigma toward individuals with serious mental illness. Results from a recently published study showed that, although attitudes toward those with major depression have improved in the United States over the past few decades, stigma toward those with schizophrenia has actually worsened.
The most effective approach to reducing stigma is to “face up to the evidence, then try and prevent the negative outcomes,” Dr. Fazel said.
“The conclusion of this paper is that it’s all pointing toward a strategy toward prevention by developing high-quality risk assessment and then developing high-quality treatment programs that include not just pharmacological treatments but psychosocial treatments and beyond,” he added. “We know that’s the way it works for other disorders as well.”
Although mental illness stigma is a serious problem, Dr. Pies noted, “the risk is not so much that studies of this sort are carried out and then covered in the media, but that they are decontextualized and reduced to ‘bumper sticker’ headlines.”
“The public needs context and perspective,” he said. “It needs to be informed that violent behavior is relatively rare among persons with psychiatric illness, including persons with schizophrenia and related disorders who do not also have a substance use disorder.”
Indeed, some studies have shown that individuals with mental illness are more often the victims of violence than the perpetrators.
“Frankly, the public is much more at risk from the neighborhood lout who drinks heavily and repeatedly starts bar fights than from the average patient with a schizophrenia spectrum disorder,” Dr. Pies said.
Dr. Fazel reported receiving funding from the Wellcome Trust. Dr. DeLisi and Dr. Pies disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
FROM JAMA PSYCHIATRY