Sleep patterns among rural Chinese twin adolescents.

ABSTRACT:

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 8.6h on weekdays and 9.4h 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 tim

SUBMITTER: Ouyang F 

PROVIDER: S-EPMC2753967 | biostudies-literature | 2009 Apr

REPOSITORIES: biostudies-literature