Association between Sleep hours and Osteoporosis in middle aged and elderly Koreans

Abstract

Background: Osteoporosis affects the bones, increasing the risk of fracture and mortality among middle aged and elderly people. There are many researches between risk factors and osteoporosis but it is difficult to find about the sleep hours and osteoporosis. This study was to determine the association between sleep hours (hours per night) and osteoporosis among middle aged and elderly people. Methods: Among 2,844 middle aged and elderly people(1,223 male, 1,621 female) who participated in 2010 National health and nutrition examination survey. The participants were divided into six groups according to their self-reported average sleep hours per night.(≤4,5,6,7,8,≥9). Osteoporosis is defined as clinically diagnosed cases only. Logistic regression analysis was conducted to explore the association between sleep hours and osteoporosis. Results: Those who slept 4 hours or less were more likely to have osteoporosis(OR=3.08, 95% CI: 1.73-5.45) than those who slept more than 9 hours. Factors such as gender, age and familial history of osteoporosis were significantly associated with osteoporosis. Conclusion: This study shows that those who slept 4 hours or less seems to increasing risk odds of osteoporosis compared to longer sleepers(≥9 hours), therefore sleep hours seem to be an important factor for osteoporosis and providing longer sleep hours is recommended to prevent for osteoporosis.