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American Journal of Epidemiology Advance Access originally published online on August 13, 2007
American Journal of Epidemiology 2007 166(9):1053-1058; doi:10.1093/aje/kwm175
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American Journal of Epidemiology © The Author 2007. Published by the Johns Hopkins Bloomberg School of Public Health. All rights reserved. For permissions, please e-mail: journals.permissions@oxfordjournals.org.

ORIGINAL CONTRIBUTIONS

Short Duration of Sleep and Unintentional Injuries among Adolescents in China

Lawrence T. Lam1 and L. Yang2

1 Royal Alexandra Hospital for Children, Westmead, New South Wales, Australia
2 School of Public Health, Guangxi Medical University, Nanning, Guangxi, China

Correspondence to Lawrence T. Lam, Royal Alexandra Hospital for Children, Locked Bag 4001, Westmead, New South Wales 2145, Australia (e-mail: lawrencl{at}chw.edu.au).

Received for publication March 27, 2007. Accepted for publication May 15, 2007.

Using a population-based cross-sectional health survey, the authors investigated the association between nightly duration of sleep and unintentional injuries among high school students in Nanning, China. The survey utilized a two-stage random cluster-sampling design. In March 2005, adolescents aged 13–17 years were recruited from students attending the first 3 years of high school in Nanning. Sleep duration was measured by self-reported usual times of going to bed and rising during a normal school week. Unintentional injury was assessed via a structured personal interview. Data were analyzed using multinomial logistic regression with adjustment for the effects of cluster sampling. After adjustment for potentially confounding factors, adolescents who slept less than 7 hours per night during a normal school week were approximately two times more likely to have experienced multiple episodes of unintentional injury during the 3-month presurvey period (odds ratio = 2.2, 95% confidence interval: 1.1, 4.8) than those who slept 7 hours or more (p < 0.05). There was also a nonsignificantly (p > 0.05) increased risk of single injury for adolescents with short sleep durations (odds ratio = 1.5, 95% confidence interval: 0.9, 2.3). Findings suggest that a short nightly duration of sleep can be considered a potential risk factor for multiple unintentional injuries among adolescents.

adolescent; China; health surveys; sleep; wounds and injuries

Abbreviations: CI, confidence interval; OR, odds ratio


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 Am J EpidemiolHome page
Y. Li and J. Zhang
RE: "SHORT DURATION OF SLEEP AND UNINTENTIONAL INJURIES AMONG ADOLESCENTS IN CHINA"
Am. J. Epidemiol., March 15, 2008; 167(6): 754 - 755.
[Full Text] [PDF]

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 Am J EpidemiolHome page
L. T. Lam
THE FIRST AUTHOR REPLIES
Am. J. Epidemiol., March 15, 2008; 167(6): 755 - 756.
[Full Text] [PDF]


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