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It is becoming increasingly clear that obesity is one of the biggest risk factors for severe COVID-19 disease, particularly among younger patients.
Newly published data from New York show that, among those aged under 60 years, obesity was twice as likely to result in hospitalization for COVID-19 and also significantly increased the likelihood that a person would end up in intensive care.
“Obesity [in people younger than 60] appears to be a previously unrecognized risk factor for hospital admission and need for critical care. This has important and practical implications when nearly 40% of adults in the U.S. are obese with a body mass index [BMI] of [at least] 30,” wrote Jennifer Lighter, MD, of New York University Langone Health, and colleagues in their research letter published in Clinical Infectious Diseases.
Similar findings in a preprint publication, yet to be peer reviewed, from another New York hospital show that, with the exception of older age, obesity (BMI greater than 40 kg/m2) had the strongest association with hospitalization for COVID-19, increasing the risk more than 500%.
Meanwhile, a new French study shows a high frequency of obesity among patients admitted to one ICU for COVID-19; furthermore, disease severity increased with increasing BMI. One of the authors said in an interview that many of the presenting patients were younger, with their only risk factor being obesity.
“Patients with obesity should avoid any COVID-19 contamination by enforcing all prevention measures during the current pandemic,” wrote the authors, led by Arthur Simonnet, MD, Centre Hospitalier Universitaire de Lille (France).
They also stressed that COVID-19 patients “with severe obesity should be monitored more closely.”
Those with obesity are young and become very sick, very quickly
François Pattou, MD, PhD, coauthor of the French article published in Obesity said in an interview that, when patients with COVID-19 began to arrive at their ICU in Lille, there were young patients who did not have any other comorbidities.
“They were just obese,” he observed, adding that they seemed “to have a very specific disease, something different” from that seen before, with patients becoming very sick, very quickly.
In their study, they examined 124 consecutive patients admitted to intensive care with COVID-19 between Feb. 25 and April 5, 2020, and compared them with a historical control group of 306 patients admitted to the ICU at the same hospital for non–COVID-19-related severe acute respiratory disease in 2019.
By April 6, 60 patients with COVID-19 had been discharged from intensive care, 18 had died, and 46 remained in the unit. The majority (73%) were male, and their median age was 60 years. Obesity and severe obesity were significantly more prevalent among the patients with COVID-19, at 47.6% and 28.2% versus 25.2% and 10.8% among historical controls (P < .001 for trend).
A key finding was that those with a BMI greater than 35 had a more than 600% increased risk of requiring mechanical ventilation (odds ratio, 7.36; P = .021), compared with those with a BMI less than 25, even after adjusting for age, diabetes, and hypertension.
Obesity in under 60s at least doubles risk of admission in U.S.
The studies out of New York, one of which was stratified by age, paint a similar picture.
Dr. Lighter and colleagues found that, of the 3,615 individuals who tested positive for COVID-19 in their series, 775 (21%) had a BMI of 30-34 and 595 (16%) had a BMI of at least 35. Obesity wasn’t a predictor of admission to hospital or the ICU in those over the age of 60 years, but in those younger than 60 years, it was.
Those under age 60 with a BMI of 30-34 were twice as likely to be admitted to hospital (hazard ratio, 2.0; P < .0001) and critical care (HR, 1.8; P = .006), compared with those under age 60 with a BMI less than 30. Likewise, those under age 60 with a BMI of at least 35 were 2.2 (P < .0001) and 3.6 (P < .0001) times more likely to be admitted to acute and critical care.
“Unfortunately, obesity in people [less than] 60 years is a newly identified epidemiologic risk factor which may contribute to increased morbidity rates [with COVID-19] experienced in the U.S.,” they concluded.
And in the other U.S. study, Christopher M. Petrilli, MD, of New York University, and colleagues looked at 4,103 patients with COVID-19 treated between March 1 and April 2, 2020, and followed to April 7.
Just under half of patients (48.7%) were hospitalized, of whom 22.3% required mechanical ventilation and 14.6% died or were discharged to hospice. The research was published on medRxiv, showing that, apart from age, the strongest predictors of hospitalization were BMI greater than 40 (OR, 6.2) and heart failure (OR, 4.3).
“It is notable that the chronic condition with the strongest association with critical illness was obesity, with a substantially higher odds ratio than any cardiovascular or pulmonary disease,” they noted.
Inflammation is a possible culprit
Dr. Pattou believes that the culprit behind the increased risk of disease severity seen with obesity in COVID-19 is inflammation, mediated by fibrin deposits in the circulation, which his colleagues have seen on autopsy, and which “block oxygen passage through the blood.”
This may help explain why mechanical ventilation can be less successful in these patients. “The answer is to get rid of this inflammation,” Dr. Pattou observed.
Dr. Petrilli and colleagues also observed that obesity “is well-recognized to be a proinflammatory condition.”
And their findings showed “the importance of inflammatory markers in distinguishing future critical from noncritical illness,” they said, noting that, among these markers, early elevations in C-reactive protein and D-dimer “had the strongest association with mechanical ventilation or mortality.”
Livio Luzi, MD, of IRCCS MultiMedica, Milan, Italy, has previously written on the relationship between influenza and obesity, and discussed in an interview the potential lessons for the COVID-19 pandemic.
“Obesity is characterized by an impairment of immune response and by a low-grade chronic inflammation. Furthermore, obese subjects have an altered dynamic of pulmonary ventilation, with reduced diaphragmatic excursion,” Dr. Luzi said. These factors, alongside others, “may help to explain” the current results, and stress the importance of close monitoring of those with obesity and COVID-19.
No relevant financial relationships were declared.
This article first appeared on Medscape.com.
It is becoming increasingly clear that obesity is one of the biggest risk factors for severe COVID-19 disease, particularly among younger patients.
Newly published data from New York show that, among those aged under 60 years, obesity was twice as likely to result in hospitalization for COVID-19 and also significantly increased the likelihood that a person would end up in intensive care.
“Obesity [in people younger than 60] appears to be a previously unrecognized risk factor for hospital admission and need for critical care. This has important and practical implications when nearly 40% of adults in the U.S. are obese with a body mass index [BMI] of [at least] 30,” wrote Jennifer Lighter, MD, of New York University Langone Health, and colleagues in their research letter published in Clinical Infectious Diseases.
Similar findings in a preprint publication, yet to be peer reviewed, from another New York hospital show that, with the exception of older age, obesity (BMI greater than 40 kg/m2) had the strongest association with hospitalization for COVID-19, increasing the risk more than 500%.
Meanwhile, a new French study shows a high frequency of obesity among patients admitted to one ICU for COVID-19; furthermore, disease severity increased with increasing BMI. One of the authors said in an interview that many of the presenting patients were younger, with their only risk factor being obesity.
“Patients with obesity should avoid any COVID-19 contamination by enforcing all prevention measures during the current pandemic,” wrote the authors, led by Arthur Simonnet, MD, Centre Hospitalier Universitaire de Lille (France).
They also stressed that COVID-19 patients “with severe obesity should be monitored more closely.”
Those with obesity are young and become very sick, very quickly
François Pattou, MD, PhD, coauthor of the French article published in Obesity said in an interview that, when patients with COVID-19 began to arrive at their ICU in Lille, there were young patients who did not have any other comorbidities.
“They were just obese,” he observed, adding that they seemed “to have a very specific disease, something different” from that seen before, with patients becoming very sick, very quickly.
In their study, they examined 124 consecutive patients admitted to intensive care with COVID-19 between Feb. 25 and April 5, 2020, and compared them with a historical control group of 306 patients admitted to the ICU at the same hospital for non–COVID-19-related severe acute respiratory disease in 2019.
By April 6, 60 patients with COVID-19 had been discharged from intensive care, 18 had died, and 46 remained in the unit. The majority (73%) were male, and their median age was 60 years. Obesity and severe obesity were significantly more prevalent among the patients with COVID-19, at 47.6% and 28.2% versus 25.2% and 10.8% among historical controls (P < .001 for trend).
A key finding was that those with a BMI greater than 35 had a more than 600% increased risk of requiring mechanical ventilation (odds ratio, 7.36; P = .021), compared with those with a BMI less than 25, even after adjusting for age, diabetes, and hypertension.
Obesity in under 60s at least doubles risk of admission in U.S.
The studies out of New York, one of which was stratified by age, paint a similar picture.
Dr. Lighter and colleagues found that, of the 3,615 individuals who tested positive for COVID-19 in their series, 775 (21%) had a BMI of 30-34 and 595 (16%) had a BMI of at least 35. Obesity wasn’t a predictor of admission to hospital or the ICU in those over the age of 60 years, but in those younger than 60 years, it was.
Those under age 60 with a BMI of 30-34 were twice as likely to be admitted to hospital (hazard ratio, 2.0; P < .0001) and critical care (HR, 1.8; P = .006), compared with those under age 60 with a BMI less than 30. Likewise, those under age 60 with a BMI of at least 35 were 2.2 (P < .0001) and 3.6 (P < .0001) times more likely to be admitted to acute and critical care.
“Unfortunately, obesity in people [less than] 60 years is a newly identified epidemiologic risk factor which may contribute to increased morbidity rates [with COVID-19] experienced in the U.S.,” they concluded.
And in the other U.S. study, Christopher M. Petrilli, MD, of New York University, and colleagues looked at 4,103 patients with COVID-19 treated between March 1 and April 2, 2020, and followed to April 7.
Just under half of patients (48.7%) were hospitalized, of whom 22.3% required mechanical ventilation and 14.6% died or were discharged to hospice. The research was published on medRxiv, showing that, apart from age, the strongest predictors of hospitalization were BMI greater than 40 (OR, 6.2) and heart failure (OR, 4.3).
“It is notable that the chronic condition with the strongest association with critical illness was obesity, with a substantially higher odds ratio than any cardiovascular or pulmonary disease,” they noted.
Inflammation is a possible culprit
Dr. Pattou believes that the culprit behind the increased risk of disease severity seen with obesity in COVID-19 is inflammation, mediated by fibrin deposits in the circulation, which his colleagues have seen on autopsy, and which “block oxygen passage through the blood.”
This may help explain why mechanical ventilation can be less successful in these patients. “The answer is to get rid of this inflammation,” Dr. Pattou observed.
Dr. Petrilli and colleagues also observed that obesity “is well-recognized to be a proinflammatory condition.”
And their findings showed “the importance of inflammatory markers in distinguishing future critical from noncritical illness,” they said, noting that, among these markers, early elevations in C-reactive protein and D-dimer “had the strongest association with mechanical ventilation or mortality.”
Livio Luzi, MD, of IRCCS MultiMedica, Milan, Italy, has previously written on the relationship between influenza and obesity, and discussed in an interview the potential lessons for the COVID-19 pandemic.
“Obesity is characterized by an impairment of immune response and by a low-grade chronic inflammation. Furthermore, obese subjects have an altered dynamic of pulmonary ventilation, with reduced diaphragmatic excursion,” Dr. Luzi said. These factors, alongside others, “may help to explain” the current results, and stress the importance of close monitoring of those with obesity and COVID-19.
No relevant financial relationships were declared.
This article first appeared on Medscape.com.
It is becoming increasingly clear that obesity is one of the biggest risk factors for severe COVID-19 disease, particularly among younger patients.
Newly published data from New York show that, among those aged under 60 years, obesity was twice as likely to result in hospitalization for COVID-19 and also significantly increased the likelihood that a person would end up in intensive care.
“Obesity [in people younger than 60] appears to be a previously unrecognized risk factor for hospital admission and need for critical care. This has important and practical implications when nearly 40% of adults in the U.S. are obese with a body mass index [BMI] of [at least] 30,” wrote Jennifer Lighter, MD, of New York University Langone Health, and colleagues in their research letter published in Clinical Infectious Diseases.
Similar findings in a preprint publication, yet to be peer reviewed, from another New York hospital show that, with the exception of older age, obesity (BMI greater than 40 kg/m2) had the strongest association with hospitalization for COVID-19, increasing the risk more than 500%.
Meanwhile, a new French study shows a high frequency of obesity among patients admitted to one ICU for COVID-19; furthermore, disease severity increased with increasing BMI. One of the authors said in an interview that many of the presenting patients were younger, with their only risk factor being obesity.
“Patients with obesity should avoid any COVID-19 contamination by enforcing all prevention measures during the current pandemic,” wrote the authors, led by Arthur Simonnet, MD, Centre Hospitalier Universitaire de Lille (France).
They also stressed that COVID-19 patients “with severe obesity should be monitored more closely.”
Those with obesity are young and become very sick, very quickly
François Pattou, MD, PhD, coauthor of the French article published in Obesity said in an interview that, when patients with COVID-19 began to arrive at their ICU in Lille, there were young patients who did not have any other comorbidities.
“They were just obese,” he observed, adding that they seemed “to have a very specific disease, something different” from that seen before, with patients becoming very sick, very quickly.
In their study, they examined 124 consecutive patients admitted to intensive care with COVID-19 between Feb. 25 and April 5, 2020, and compared them with a historical control group of 306 patients admitted to the ICU at the same hospital for non–COVID-19-related severe acute respiratory disease in 2019.
By April 6, 60 patients with COVID-19 had been discharged from intensive care, 18 had died, and 46 remained in the unit. The majority (73%) were male, and their median age was 60 years. Obesity and severe obesity were significantly more prevalent among the patients with COVID-19, at 47.6% and 28.2% versus 25.2% and 10.8% among historical controls (P < .001 for trend).
A key finding was that those with a BMI greater than 35 had a more than 600% increased risk of requiring mechanical ventilation (odds ratio, 7.36; P = .021), compared with those with a BMI less than 25, even after adjusting for age, diabetes, and hypertension.
Obesity in under 60s at least doubles risk of admission in U.S.
The studies out of New York, one of which was stratified by age, paint a similar picture.
Dr. Lighter and colleagues found that, of the 3,615 individuals who tested positive for COVID-19 in their series, 775 (21%) had a BMI of 30-34 and 595 (16%) had a BMI of at least 35. Obesity wasn’t a predictor of admission to hospital or the ICU in those over the age of 60 years, but in those younger than 60 years, it was.
Those under age 60 with a BMI of 30-34 were twice as likely to be admitted to hospital (hazard ratio, 2.0; P < .0001) and critical care (HR, 1.8; P = .006), compared with those under age 60 with a BMI less than 30. Likewise, those under age 60 with a BMI of at least 35 were 2.2 (P < .0001) and 3.6 (P < .0001) times more likely to be admitted to acute and critical care.
“Unfortunately, obesity in people [less than] 60 years is a newly identified epidemiologic risk factor which may contribute to increased morbidity rates [with COVID-19] experienced in the U.S.,” they concluded.
And in the other U.S. study, Christopher M. Petrilli, MD, of New York University, and colleagues looked at 4,103 patients with COVID-19 treated between March 1 and April 2, 2020, and followed to April 7.
Just under half of patients (48.7%) were hospitalized, of whom 22.3% required mechanical ventilation and 14.6% died or were discharged to hospice. The research was published on medRxiv, showing that, apart from age, the strongest predictors of hospitalization were BMI greater than 40 (OR, 6.2) and heart failure (OR, 4.3).
“It is notable that the chronic condition with the strongest association with critical illness was obesity, with a substantially higher odds ratio than any cardiovascular or pulmonary disease,” they noted.
Inflammation is a possible culprit
Dr. Pattou believes that the culprit behind the increased risk of disease severity seen with obesity in COVID-19 is inflammation, mediated by fibrin deposits in the circulation, which his colleagues have seen on autopsy, and which “block oxygen passage through the blood.”
This may help explain why mechanical ventilation can be less successful in these patients. “The answer is to get rid of this inflammation,” Dr. Pattou observed.
Dr. Petrilli and colleagues also observed that obesity “is well-recognized to be a proinflammatory condition.”
And their findings showed “the importance of inflammatory markers in distinguishing future critical from noncritical illness,” they said, noting that, among these markers, early elevations in C-reactive protein and D-dimer “had the strongest association with mechanical ventilation or mortality.”
Livio Luzi, MD, of IRCCS MultiMedica, Milan, Italy, has previously written on the relationship between influenza and obesity, and discussed in an interview the potential lessons for the COVID-19 pandemic.
“Obesity is characterized by an impairment of immune response and by a low-grade chronic inflammation. Furthermore, obese subjects have an altered dynamic of pulmonary ventilation, with reduced diaphragmatic excursion,” Dr. Luzi said. These factors, alongside others, “may help to explain” the current results, and stress the importance of close monitoring of those with obesity and COVID-19.
No relevant financial relationships were declared.
This article first appeared on Medscape.com.