School of Nursing, University of Maryland, Baltimore, MD 21201-1579, USA.
J Sleep Res. 2010 Dec;19(4):559-66. doi: 10.1111/j.1365-2869.2010.00840.x.
Obesity continues to be a major public health issue. In adolescents, there are limited studies on the relationship between obesity and sleep duration. We found hypothesized that an average sleep duration of <6 h in adolescents was associated with obesity. Data were from the National Longitudinal Study of Adolescent Health (ADD Health); a survey of 90,000 youths, aged 12-18 years; surveyed in several waves. The sample population for our study was 13,568. Weighted multiple logistic regression was used to identify the relationship between obesity at Wave II and sleep duration, having adjusted for skipping breakfast ≥ 2/week; race, gender, parental income, TV ≥ 2 h per day, depression, and obesity at Wave I. At Wave I, the mean age was 15.96 ± 0.11 years; mean sleep hours were 7.91 ± 0.04. At Waves I and II, respectively, 10.6 and 11.2% of adolescents were obese. Adjusted analyses suggest that the effect of shortened sleep duration in Wave I was not significantly predictive of obesity in Wave II (P < 0.218). Longitudinally, depression and TV ≥ 2 h per day at Wave I was associated with a higher risk of obesity at Wave II in adjusted analyses. Depressed adolescents were almost twice as likely to be obese (OR = 1.84, 95% CI = 1.25-2.72); adolescents who watched TV ≥ 2 h per day were 37% more likely to be obese (OR = 1.37, 95% CI = 1.09-1.72). Environmental factors including TV ≥ 2 h per day and depression were significantly associated with obesity; shortened sleep duration was not. Future longitudinal studies in adolescents are needed to determine whether timing of television watching directly influences sleep patterns and, ultimately, obesity.
肥胖仍然是一个主要的公共卫生问题。在青少年中，关于肥胖与睡眠持续时间之间关系的研究有限。我们假设，青少年平均睡眠持续时间<6 小时与肥胖有关。数据来自全国青少年健康纵向研究（ADD 健康）；对 90000 名年龄在 12-18 岁的青少年进行了几次调查。我们的研究样本人口为 13568 人。使用加权多逻辑回归来确定肥胖在第 II 波和睡眠持续时间之间的关系，同时调整了每周至少不吃早餐 2 次；种族、性别、父母收入、每天看电视≥2 小时、抑郁和第 I 波肥胖。在第 I 波时，平均年龄为 15.96±0.11 岁；平均睡眠时间为 7.91±0.04 小时。分别在第 I 波和第 II 波，10.6%和 11.2%的青少年肥胖。调整后的分析表明，第 I 波缩短睡眠时间的影响在第 II 波肥胖中没有显著预测作用（P<0.218）。纵向分析表明，第 I 波抑郁和每天看电视≥2 小时与调整后的第 II 波肥胖风险增加相关。抑郁的青少年肥胖的可能性几乎是两倍（OR=1.84，95%CI=1.25-2.72）；每天看电视≥2 小时的青少年肥胖的可能性增加 37%（OR=1.37，95%CI=1.09-1.72）。包括每天看电视≥2 小时和抑郁在内的环境因素与肥胖显著相关；睡眠时间缩短则没有。需要对青少年进行未来的纵向研究，以确定每天看电视的时间是否直接影响睡眠模式，并最终影响肥胖。
