Sleep patterns among rural Chinese twin adolescents

Fengxiu Ouyang, Brandon S. Lu, Binyan Wang, Jianhua Yang, Zhiping Li, Liuliu Wang, Genfu Tang, Houxun Xing, Xiping Xu, Ronald D. Chervin, Phyllis C Zee, Xiaobin Wang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)479-489
Number of pages11
JournalSleep Medicine
Issue number4
StatePublished - Apr 1 2009


  • Age
  • Bedtime
  • Gender
  • Puberty
  • Sleep patterns
  • Tanner Stages
  • Total sleep time
  • Wake-up time

ASJC Scopus subject areas

  • Medicine(all)

Fingerprint Dive into the research topics of 'Sleep patterns among rural Chinese twin adolescents'. Together they form a unique fingerprint.

Cite this