The association between sleep duration and obesity in older adults

作者：Patel S R^*; Blackwell T; Redline S; Ancoli Israel S; Cauley J A; Hillier T A; Lewis C E; Orwoll E S; Stefanick M L; Taylor B C; Yaffe K; Stone K L

来源：International Journal of Obesity, 2008, 32(12): 1825-1834.

DOI：10.1038/ijo.2008.198

• sleep duration
• sleep deprivation
• central obesity
• geriatrics
• insomnia
• sleepiness

Background: Reduced sleep has been reported to predict obesity in children and young adults. However, studies based on self-report have been unable to identify an association in older populations. In this study, the cross-sectional associations between sleep duration measured objectively and measures of weight and body composition were assessed in two cohorts of older adults.
Methods: Wrist actigraphy was performed for a mean (s.d.) of 5.2 (0.9) nights in 3055 men (age: 67-96 years) participating in the Osteoporotic Fractures in Men Study (MrOS) and 4.1 (0.8) nights in 3052 women (age: 70-99 years) participating in the Study of Osteoporotic Fractures (SOF). A subgroup of 2862 men and 455 women also underwent polysomnography to measure sleep apnea severity.
Results: Compared to those sleeping an average of 7-8 h per night, and after adjusting for multiple risk factors and medical conditions, a sleep duration of less than 5 h was associated with a body mass index (BMI) that was on average 2.5 kg/m(2) (95% confidence interval (CI): 2.0-2.9) greater in men and 1.8 kg/m(2) (95% CI: 1.1-2.4) greater in women. The odds of obesity (BMI X30 kg/m(2)) was 3.7- fold greater (95% CI: 2.7-5.0) in men and 2.3-fold greater in women ( 95% CI: 1.6-3.1) who slept less than 5 h. Short sleep was also associated with central body fat distribution and increased percent body fat. These associations persisted after adjusting for sleep apnea, insomnia and daytime sleepiness.
Conclusions: In older men and women, actigraphy-ascertained reduced sleep durations are strongly associated with greater adiposity.

• 出版日期2008-12