Association between weight gain, obesity, and sleep duration: a large-scale 3-year cohort study
- 1.4k Downloads
Previous research suggests that sleep duration is associated with obesity and weight gain. However, the majority of these studies are of cross-sectional design, with only a few cohort studies. In order to validate previous findings in a more real-world context, we evaluated the association between sleep duration, obesity, and weight gain in a large, 3-year cohort study.
A retrospective cohort study was conducted involving 21,469 apparently healthy individuals aged 20 years or older who underwent annual health check-ups at the Center for Preventive Medicine, St. Luke’s International Hospital, between 2005 and 2008. The participants were divided into four groups according to their self-reported average nightly sleep duration (≤5, 6, 7, and ≥8 h). We identified individuals with obesity (body mass index ≥25 kg/m2) and weight gain. Multivariate linear regression analysis and logistic regression analysis were used to explore the association between these variables and sleep duration, adjusting for age, gender, alcohol consumption, current smoking, past medical history, and level of physical activity.
Compared with those who slept 7 h, the individuals who slept ≤5 h night were more likely to experience weight gain (β coefficient = 0.03; 95% CI = 0.03–1.1) and to become obese (OR = 1.5; 95% CI = 1.1–2.0). No significant difference was seen between subjects who slept more than 8 h and those sleeping 7 h (OR = 1.3; 95% CI = 0.9–1.8).
Short sleep (≤5 h) is significantly associated with weight gain and obesity in both male and female adults.
KeywordsSleep duration Obesity Japan Weight gain Cohort
We gratefully acknowledge Dr Toshiko Kawakita for contributing data of the Center for Preventive Medicine at St. Luke’s International Hospital.
Conflict of interest
- 1.Organisation for Economic Co-operation and Development.Obesity and the Economics of Prevention: Fit not Fat. Available at: http://www.oecd.org/document/31/0,3343,en_2649_33929_45999775_1_1_1_1,00.html Accessed Oct 2, 2010.
- 2.The Ministry of Health, Labour and Welfare in Japan. National health and Nutrition surveillance, 2004 Available at: http://www.mhlw.go.jp/houdou/2006/05/h0508-1a.html Accessed June 1, 2010.
- 14.Japan Society for the Study of Obesity. Determination of obesity and diagnostic ciriteria of adiposity. Available at: http://wwwsoc.nii.ac.jp/jasso/message/pdf/message_0901.pdf Accessed Oct 2, 2010.
- 16.Lyytikainen P, Rahkonen O, Lahelma E, Lallukka T.(2010) Association of sleep duration with weight and weight gain: a prospective follow-up study. J Sleep Res; 10.1111/j.1365-2869.Google Scholar
- 20.Japanese Ministry of Health, Labour and Welfare. Total number of patients in common disease 2005. Available at: http://www.mhlw.go.jp/toukei/saikin/hw/kanja/05/05.html Accessed Feb 28, 2011.