Sleep Duration or Bedtime? Exploring the Relationship between Sleep Habits and Weight Status and Activity Patterns
Sleep Duration or Bedtime? Exploring the Relationship between Sleep Habits and Weight Status and Activity Patterns
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DOI：
10.5665/sleep.1266
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发表时间：
2011-10-01
期刊：
影响因子：
5.6
通讯作者：
Matricciani, Lisa
中科院分区：
文献类型：
--
作者：
Olds, Tim S.;Maher, Carol A.;Matricciani, Lisa
研究目的：评估早睡和晚睡和起床时间对澳大利亚学龄儿童利用时间和体重状况的影响。设计：使用时间访谈和计步器进行观察性横断面研究。背景：自由生活的澳大利亚青少年。参与者：来自澳大利亚各州的2200名9到16岁的青少年。测量和结果：根据年龄和性别调整就寝时间和起床时间，并使用中位分裂将其分为早睡和晚睡。青少年分为早睡/早起、早睡/晚起、晚睡/早起、晚睡/晚起4种睡眠-觉醒模式。这些组在使用时间(屏幕时间、体力活动和与研究相关的时间)、社会人口统计特征和体重状况方面进行了比较。尽管睡眠时间相似，但晚睡/晚起组的青少年每天屏幕时间比早睡/早起组多48分钟，中等至剧烈体力活动少27分钟(P<；0.0001)。晚睡晚起青少年的BMIz得分较高(0.66vs.0.45，P=0.0015)。晚睡/晚起青少年超重或肥胖的可能性是早睡/早起青少年的1.47倍，肥胖的可能性是2.16倍，MVPA低的可能性是1.77倍，屏幕时间长的可能性是2.92倍。晚睡晚起青少年更可能来自较贫困的家庭，居住在大城市，兄弟姐妹较少。结论：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。
Study Objectives: 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.Design: Observational cross-sectional study involving use of time interviews and pedometers.Setting: Free-living Australian adolescents.Participants: 2200 9-to 16-year-olds from all states of AustraliaInterventions: NA.Measurements and Results: 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.Conclusions: 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.