【Objective】 To investigate the association between sleep duration and adiposity among Chinese preadolescents. 【Methods】 Totally 1 588 fifth-grade students were sampled by stratified cluster random sampling from 10 primary schools of Shanghai.Socioeconomic status and sleep duration were from parental or self reported questionnaires.Height,weight,body mass index (BMI),waist circumference,Z scores of BMI and waist circumference,waist -height ratio and body fat percentage were assessed.Among children participated,boys accounted for 52.08 %( 827).The mean age o f the sample was 10.82±0.39 years old (9.42~14.08). 【Results】 The prevalence of obesity overall was 11.9% (boys 15.0%,girls 8.5%,P<0.001).Compared with those who slept ≥10 h,those who slept < 9 hours had a significantly higher BMI,BMI Z score,waist,waist Z score,waist/height ratio and body fat percentage after adjusting for potential confounders. 【Conclusion】 Short sleep duration was significantly associated with higher adiposity indices in Chinese adolescents,suggesting this may be a modifiable risk factor for adiposity.
Key words
preadolescent /
sleep duration /
adiposity /
obesity
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