Health and Use of Time (HUT) Group, Sansom Institute for Health Research, University of South Australia, Adelaide, South Australia.
Sleep. 2011 Oct 1;34(10):1299-307. doi: 10.5665/SLEEP.1266.
To assess the effects of early and late bedtimes and wake up times on use of time and weight status in Australian school-aged children.
Observational cross-sectional study involving use of time interviews and pedometers.
Free-living Australian adolescents.
2200 9- to 16-year-olds from all states of Australia
NA.
Bedtimes and wake times were adjusted for age and sex and classified as early or late using median splits. Adolescents were allocated into 4 sleep-wake pattern groups: Early-bed/Early-rise; Early-bed/Late-rise; Late-bed/Early-rise; Late-bed/Late-rise. The groups were compared for use of time (screen time, physical activity, and study-related time), sociodemographic characteristics, and weight status. Adolescents in the Late-bed/Late-rise category experienced 48 min/d more screen time and 27 min less moderate-to-vigorous physical activity (MVPA) (P<0.0001) than adolescents in the Early-bed/Early-rise category, in spite of similar sleep durations. Late-bed/Late-rise adolescents had a higher BMI z-score (0.66 vs. 0.45, P=0.0015). Late-bed/Late-rise adolescents were 1.47 times more likely to be overweight or obese than Early-bed/Early-rise adolescents, 2.16 times more likely to be obese, 1.77 times more likely to have low MVPA, and 2.92 times more likely to have high screen time. Late-bed/Late-rise adolescents were more likely to come from poorer households, to live in major cities, and have fewer siblings.
Late bedtimes and late wake up times are associated with an unfavorable activity and weight status profile, independent of age, sex, household income, geographical remoteness, and sleep duration.
评估早睡早起和晚睡晚起对澳大利亚学龄儿童时间利用和体重状况的影响。
涉及时间利用访谈和计步器的观察性横断面研究。
澳大利亚自由生活的青少年。
来自澳大利亚所有州的 2200 名 9 至 16 岁的青少年。
无。
根据年龄和性别调整了睡眠时间和醒来时间，并使用中位数分割将其分类为早或晚。将青少年分配到 4 种睡眠-觉醒模式组：早睡早起；早睡晚起；晚睡早起；晚睡晚起。比较了这些组的时间利用（屏幕时间、体育活动和与学习相关的时间）、社会人口特征和体重状况。晚睡晚起组的青少年比早睡早起组的青少年每天多观看屏幕 48 分钟，中度至剧烈体力活动（MVPA）少 27 分钟（P<0.0001），尽管睡眠时间相似。晚睡晚起的青少年 BMI z 分数更高（0.66 对 0.45，P=0.0015）。晚睡晚起的青少年超重或肥胖的可能性是早睡早起的青少年的 1.47 倍，肥胖的可能性是早睡早起的青少年的 2.16 倍，中度至剧烈体力活动不足的可能性是早睡早起的青少年的 1.77 倍，屏幕时间高的可能性是早睡早起的青少年的 2.92 倍。晚睡晚起的青少年更有可能来自贫困家庭，居住在主要城市，兄弟姐妹较少。
晚睡晚起与不良的活动和体重状况有关，与年龄、性别、家庭收入、地理位置和睡眠时间无关。
