Abstract P282: Sub-Optimal Sleep Duration is Independently Associated With Morbid Obesity in the United States

Abstract

Introduction: Extremes of sleep duration and morbid obesity are independent risk factors for cardiovascular disease (CVD). There are only a few studies that have examined the relationship between the two and even less have studied their association in a national cohort. Methods: We utilized the National Health Interview Survey (2013-2017) for this study. We assessed the cross-sectional association between habitual self-reported sleep duration (in hours) and obesity groups. We also conducted subgroup analysis to show the trends in sleep duration among subgroups with morbid obesity (BMI ≥35kg/m 2 ) Results: After exclusion of 1,897 persons who reported sleeping more than 12 hours in a day, there were 154,872 participants in the study representing a population of 227.9 million US adults annually. The prevalence of moderate (BMI 35 -39.9kg/m 2 ) and severe obesity (BMI ≥ 40kg/m 2 ) was 7.1% and 8.1% respectively. The prevalence of morbid obesity was highest among blacks, females and persons aged 40 - 64 years (21.5%, 17.5% and 17.3% respectively). There was a U-shaped distribution in the prevalence of moderate and severe obesity with increase in sleep duration. The lowest prevalence was seen among persons who slept 7-<9hours. Females, blacks and persons aged 40 - 64years had a higher prevalence of severe obesity at every subgroup of sleep duration. Across sleep duration, Asians and Hispanics demonstrated a clear U-shaped trend for severe, but not moderate obesity. In multivariate analysis controlling for demographics, CVD risk factors and comorbidities, sleeping less than 7 hours was independently associated with moderate and severe obesity, while sleeping 9 or more hours was associated with severe obesity. The above findings are depicted in attached figure. Conclusion: Compared to 7-<9 hours of sleep, shorter and longer (sub-optimal) sleep duration, was independently associated with morbid obesity. The relationship between sleep and morbid obesity differs by race and requires further exploration.