Sleep duration and overweight in adolescents: Self-reported sleep hours versus time diaries
Sleep duration and overweight in adolescents: Self-reported sleep hours versus time diaries
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DOI：
10.1542/peds.2006-2597
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发表时间：
2007-05-01
期刊：
影响因子：
8
通讯作者：
Lauderdale, Diane S.
中科院分区：
文献类型：
--
作者：
Knutson, Kristen L.;Lauderdale, Diane S.
OBJECTIVE.对儿童的研究发现，根据父母对睡眠时间的报告，睡眠时间和超重之间存在负相关。对青少年的研究一直不一致，但使用了不同的睡眠测量方法。我们使用了一个具有全国代表性的青少年样本，其中包括2种不同的睡眠时间测量方法（24小时时间日记和自我报告的通常睡眠时间），以检查超重与睡眠的关系是否对单一研究人群的睡眠测量方法敏感。我们预计这两种睡眠测量方法会有很强的相关性，而时间日记睡眠与超重风险的相关性更强，因为它可能是更准确的睡眠测量方法。在2001-2002年，来自收入动态小组研究儿童发展补充的青少年在随机的工作日和周末完成了24小时的时间日记。青少年还自我报告了平均睡眠时间。两种睡眠测量均被分为四分位数。测量身高和体重，并计算年龄和性别的BMI z评分。超重定义为95岁以上。最终样本包括767名男性和779名女性受试者，年龄在10至19岁之间。平均时间日记睡眠在工作日接近9小时，周末超过10小时。自我报告的平均睡眠时间为8小时。时间日记睡眠和自我报告的睡眠是弱相关的。时间日记睡眠与超重没有显著相关性。自我报告的睡眠与超重有关，但这种联系不是线性的。当这两种睡眠指标被纳入同一模型时，它们对超重的影响是独立的。自我报告的睡眠和时间日记睡眠之间的弱相关性以及它们与超重之间的独立性提出了关于青少年睡眠持续时间的不同测量代表什么的问题。
OBJECTIVE. Studies of children have found an inverse association between sleep duration and overweight on the basis of parental report of sleep duration. Studies in adolescents have been inconsistent but used varied measures of sleep. We used a nationally representative sample of adolescents that included 2 different measures of sleep duration (24-hour time diaries and self-reported usual sleep hours) to examine whether the association with overweight is sensitive to how sleep is measured in a single study population. We expected that the 2 measures of sleep would be strongly correlated and that the time-diary sleep would be more strongly associated with overweight risk because it is likely the more accurate measure of sleep.METHODS. In 2001-2002, adolescents from the Child Development Supplement of the Panel Study of Income Dynamics completed 24-hour time diaries on a random weekday and weekend. Adolescents also self-reported average sleep duration. Both sleep measures were categorized into quartiles. Height and weight were measured, and a BMI z score for age and gender was calculated. Overweight was defined as above the 95th percentile.RESULTS. The final sample included 767 male and 779 female subjects who were aged 10 to 19 years. Mean time-diary sleep was nearly 9 hours on weekdays and > 10 hours on weekends. Mean self-reported sleep duration was 8 hours. Time-diary sleep and self-reported sleep were weakly correlated. Time-diary sleep was not significantly associated with overweight. Self-reported sleep was associated with overweight, but the association was not linear. When both sleep measures were included in the same model, their effects on overweight were independent.CONCLUSIONS. The weak correlation between self- reported sleep and time-diary sleep and the independence of their associations with overweight raise questions about what different measures of sleep duration in adolescents represent.