Association between sleep duration and osteoporosis risk in middle-aged and elderly women: A systematic review and meta-analysis of observational studies

This meta-analysis suggests that long sleep duration (8 h or more per day) may be associated with a higher risk of osteoporosis in middle-aged and elderly. Further prospective cohort studies with longer follow-up periods, valid instruments for measurement of sleep duration and dynamic sleep quality are warranted to support the possible relationship between sleep duration and osteoporosis risk in women.