Abstract
BackgroundThe relationship between sleep duration and anthropometric indices are still unclear. This study aimed to explore the association between sleep duration and body mass index (BMI), percentage of body fat (PBF) and visceral fat area (VFA) among Chinese adults, further to explore gender difference in it.MethodsWe analyzed part of the baseline data of a cohort study among adult attendees at two health-screening centers in China. Sleep duration was self-reported and categorized into short (< 7 h/day), optimal (7-9 h/day) and long sleep (≥ 9 h/day). BMI, PBF and VFA were assessed by bioelectric impedance analysis. Demographic characteristics, chronic diseases and medication history, physical activity, smoking and alcohol drinking behaviors were measured by an investigator-administrated questionnaire.ResultsA total of 9059 adult participants (63.08% were females) were included in the analysis. The participants aged from 19 to 91 years with the mean age of 45.0 ± 14.6 years. Short sleep was independently associated with elevated odds of general obesity (defined using BMI) and visceral obesity (defined using VFA) among the total study population, and gender differences were observed in these associations. Among women, short sleep was associated with 62% increased odds of general obesity (OR = 1.62, 95% CI: 1.24-2.12) and 22% increased odds of visceral obesity (OR = 1.22, 95% CI: 1.02-1.45). Among men, long sleep duration was associated with 21% decreased odds of visceral obesity (OR = 0.79, 95% CI: 0.64-0.99). No association was observed between sleep duration and PBF in both sexes.ConclusionsSleep duration was associated with increased odds of general and visceral obesity, and this association differed between men and women. No association was observed between sleep duration and PBF among either males or females.
Highlights
The relationship between sleep duration and anthropometric indices are still unclear
Serval studies reported inconsistent gender differences in this association, for example, Ko et al found an inverse trend between sleep duration and body mass index (BMI) only in men (r = -0.054, p = 0.011) [12]; whereas a Taiwanese study indicated an opposite result that women with < 6 h sleep per day exhibited an increased likelihood of general obesity (OR= 3.16, 95% CI: 1.33-7.53)
The current study found that sleep duration was associated with BMI and visceral fat area (VFA), and there were gender differences in this relationship
Summary
The relationship between sleep duration and anthropometric indices are still unclear. This study aimed to explore the association between sleep duration and body mass index (BMI), percentage of body fat (PBF) and visceral fat area (VFA) among Chinese adults, further to explore gender difference in it. In parallel to the elevated prevalence of obesity, sleep deprivation and poor sleep quality are increasing globally [2,3,4,5,6]. Serval studies reported inconsistent gender differences in this association, for example, Ko et al found an inverse trend between sleep duration and BMI only in men (r = -0.054, p = 0.011) [12]; whereas a Taiwanese study indicated an opposite result that women with < 6 h sleep per day exhibited an increased likelihood of general obesity (OR= 3.16, 95% CI: 1.33-7.53). Visceral obesity is proven to be associated with elevated prevalence of metabolic syndrome and cardiovascular diseases [14,15,16]
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