title: Is Self-Reported Sleep Duration Associated with Osteoporosis? Data from a 4-Year Aggregated Analysis from the National Health and Nutrition Examination Survey.
abstract: OBJECTIVE
  To examine the association between self-reported sleep duration and osteoporosis in a national sample of the U.S. elderly population.
  
  
  METHODS
  Population-based cross-sectional study.
  
  
  METHODS
  Four-year National Health and Nutrition Examination Survey data from two survey cycles between 2005-06 and 2007-08.
  
  
  METHODS
  Men and women aged 50 and older with data in the surveys and medical examination data files (N = 5,288).
  
  
  METHODS
  Osteoporosis diagnosis was based on bone mineral density measurement and self-report. Sleep duration was ascertained from the sleep survey. Simple and multiple logistic regression models were used to evaluate the association between these two factors.
  
  
  RESULTS
  Shorter sleep duration (<6 hours) was found to be significantly associated with osteoporosis after adjusting for potential covariates (odds ratio (OR) = 1.59, 95% confidence interval (CI) = 1.07-2.37). After stratifying according to age group, this association remained significant (OR = 1.80, 95% CI = 1.20-2.68) only in the older age group (>65).
  
  
  CONCLUSIONS
  These results underscore the possible linkage between sleep and osteoporosis and the need for additional research on this topic.
authors.affiliation: Graduate Program in Public Health, Eastern Virginia Medical School, Norfolk, Virginia.
authors.forename: Tina D
authors.initials: TD
authors.lastname: Cunningham
authors.affiliation: Graduate Program in Public Health, Eastern Virginia Medical School, Norfolk, Virginia.
authors.forename: Brian S
authors.initials: BS
authors.lastname: Di Pace
mesh_terms: D000368:Aged; D015519:Bone Density; D015897:Comorbidity; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009749:Nutrition Surveys; D010024:Osteoporosis / Q000453:epidemiology / Q000209:etiology*; D012307:Risk Factors; D057566:Self Report; D012890:Sleep / Q000502:physiology*; D013997:Time Factors; D014481:United States / Q000453:epidemiology
keywords: NHANES; osteoporosis; sleep disorders; sleep duration