Habitual sleep duration and sleep duration variation are independently associated with body mass index

Background: Sleep plays a vital role in maintaining homeostasis and promoting health. Previous studies show that shorter sleep duration is associated with elevated body mass index (BMI) and other cardiovascular risk factors. The goal of this study was to investigate the effects of habitual sleep dur...

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Bibliographic Details
Published in:International Journal of Obesity 2018-04, Vol.42 (4), p.794-800
Main Authors: Xu, X, Conomos, M P, Manor, O, Rohwer, J E, Magis, A T, Lovejoy, J C
Format: Article
Language:English
Subjects:
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Biomarkers
Body mass index
Body size
Cardiovascular diseases
Epidemiology
Females
Gene sequencing
Genomes
Health aspects
Health promotion
Health Promotion and Disease Prevention
Health risks
Homeostasis
Internal Medicine
Mathematical analysis
Mathematical models
Medicine
Medicine & Public Health
Metabolic Diseases
Obesity
original-article
Public Health
Regression analysis
Regression models
Risk analysis
Risk factors
Sleep
Sleep deprivation
Standard error
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Summary:Background: Sleep plays a vital role in maintaining homeostasis and promoting health. Previous studies show that shorter sleep duration is associated with elevated body mass index (BMI) and other cardiovascular risk factors. The goal of this study was to investigate the effects of habitual sleep duration and nightly sleep duration variation based on daily device-recorded data on BMI and obesity-related biomarkers. Methods: In all, 748 individuals (50.6% females, 85.4% European-Americans, average age: 49.7 years old) participated in a commercial lifestyle coaching program beginning in July 2015. Daily sleep data were recorded by Fitbit Charge HR wristbands. Clinical laboratory blood tests were measured up to three times over a 12-month period. Linear regression models were used for cross-sectional analyses, and generalized estimating equations for longitudinal analyses. All models were adjusted for age, sex, geographic location, season, genetic ancestry inferred from whole genome sequencing data, and BMI (if applicable). Multiple testing issues were corrected by false discovery rate. Results: We calculated habitual sleep duration and nightly sleep duration variation. In general, females slept 15-min longer on average than males. A negative correlation was found between habitual sleep duration and BMI ( β =−1.12, standard error=0.25, P
ISSN:0307-0565
1476-5497
DOI:10.1038/ijo.2017.223