Sleep patterns among rural Chinese twin adolescents

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• 作者：Fengxiu Ouyang ; Br ; on S. Lu ; Binyan Wang ; Jianhua Yang ; Zhiping Li ; Liuliu Wang ; Genfu Tang ; Houxun Xing ; Xiping Xu ; Ronald D. Chervin ; Phyllis C. Zee ; Xiaobin Wang
• 关键词：Age ; Gender ; Puberty ; Tanner Stages ; Sleep patterns ; Wake-up time ; Bedtime ; Total sleep time
• 刊名：Sleep Medicine
• 出版年：2009
• 出版时间：April 2009
• 年：2009
• 卷：10
• 期：4
• 页码：479-489
• 全文大小：202 K

文摘

Objective

To examine sleep patterns and influencing factors (age, gender, Tanner Stage, weekday vs. weekend, and pre-sleep activity) among rural Chinese adolescents.

Methods

This is a prospective study among 621 adolescents aged 11–20 years (341 males) using both a questionnaire and sleep diary to obtain bedtime, wake-up time, sleep latency, and total sleep time (TST).

Results

The median TST was 8.6 h on weekdays and 9.4 h on weekends. Despite absence of late night social pressure and computers, a U-shaped TST pattern was observed across age and Tanner Stage, with a nadir around age 15–16 years or Tanner IV. Bedtimes became progressively later with age and Tanner Stage, while wake-up time was considerably earlier for school students or up to Tanner IV. Later wake-up times and longer TST on weekends were seen in school students, but not in non-school adolescents (>17 years). Pre-sleep activity, like reading or studying, was related to later bedtime, earlier wake-up time, and shorter TST in both genders.

Conclusions

Age, Tanner Stage, and pre-sleep activity affected sleep patterns in this sample of rural Chinese adolescents. Later bedtime coupled with earlier wake-up time associated with academic demand appear to be important contributors to sleep loss among school students.