Department of Health and Human Physiology, University of Iowa, Iowa City, IA, 52242, USA.
Department of Epidemiology, Human Genetics, Environmental Sciences, The University of Texas Health Science Center at Houston, Houston, USA.
Sci Rep. 2020 Aug 6;10(1):13277. doi: 10.1038/s41598-020-70193-w.
Sleep may play a role in overweight and obesity in adolescents. The objective of this study is to investigate the relationships between sleep duration and timing and overweight and obesity status in adolescents, with a special emphasis on weekday-weekend difference in sleep characteristics as well as sex-specific relationships. We examined 1,254 U.S. adolescents (12-17 years) self-reported sleep duration, timing, weekday-weekend differences in duration and timing in relation to overweight and obesity. We found an inverse association between sleep duration and overweight and obesity. Compared to 8-9 h of sleep, short sleep (< 7 h) on weekdays was associated with higher odds of overweight and obesity [Odds ratio (95% confidence interval), 1.73 (1.00, 2.97)] in the overall population, while long sleep (10+ h) on weekends was associated with lower odds, but only in males [0.56 (0.34, 0.92)]. We also found that a larger weekday-weekend difference in sleep duration was associated with overweight and obesity in females, but not in males. Specifically, the odds of overweight and obesity were significantly higher among females reporting longer sleep on weekends than weekdays by ≥ 2 h [2.31 (1.15, 4.63)] when compared to those reporting little weekday-weekend differences. Sleep timing, or weekday-weekend differences in sleep timing, were not associated with overweight and obesity in the overall population, although we found suggestive evidence linking later weekend sleep with overweight and obesity in females. Our findings support a role of sleep in adolescent obesity and suggest sex-differences in this relationship that warrant future studies.
睡眠可能在青少年超重和肥胖中起作用。本研究旨在调查青少年睡眠时间和时间与超重和肥胖状况之间的关系，特别强调睡眠特征的工作日-周末差异以及性别特异性关系。我们研究了 1254 名美国青少年（12-17 岁）自我报告的睡眠时间、时间、工作日-周末睡眠时间和时间的差异与超重和肥胖的关系。我们发现睡眠时间与超重和肥胖呈负相关。与 8-9 小时的睡眠相比，工作日短睡眠（<7 小时）与超重和肥胖的几率较高相关[比值比（95%置信区间），1.73（1.00，2.97）]，而周末长睡眠（10+小时）与较低的几率相关，但仅在男性中[0.56（0.34，0.92）]。我们还发现，睡眠持续时间的工作日-周末差异越大，女性超重和肥胖的几率越高，但男性则不然。具体来说，与报告周末睡眠时间比工作日长至少 2 小时的女性相比[2.31（1.15，4.63）]，报告工作日-周末差异较小的女性超重和肥胖的几率明显更高。在整个人群中，睡眠时间或睡眠时间的工作日-周末差异与超重和肥胖无关，但我们发现有迹象表明，周末睡眠较晚与女性超重和肥胖有关。我们的研究结果支持睡眠在青少年肥胖中的作用，并表明这种关系存在性别差异，值得进一步研究。
