title: Poor sleep quality is independently associated with physical disability in older adults.
abstract: OBJECTIVE
  We aimed to evaluate the association between sleep quality and physical disability in community-dwelling older adults.
  
  
  METHODS
  There were 213 community-dwelling adults (76 men and 137 women) aged 65 years and above participated into this investigation. The Groningen Activity Restriction Scale and the Pittsburgh Sleep Quality Index were utilized to evaluate physical disability and subjective sleep quality, respectively. Global functional capacity was measured by the 6-minute walk test (6MWT). The Mini Mental State Examination and the Chinese Geriatric Depression Screening Scale were used to evaluate cognitive function and depression.
  
  
  RESULTS
  Univariate analysis revealed a correlation between physical disability and poor sleep quality, older age, 2 or more comorbidities, depression, functional capacity, and poor cognitive function. However, in the multivariate analyses, depression failed to show significant association with physical disability. In contrast, an independent association was observed between poor sleep quality and physical disability (OR = 2.03; 95% CI: 1.02-4.05).
  
  
  CONCLUSIONS
  In community-dwelling older adults, subjective poor sleep was significantly associated with physical disability, even after controlling for the effects of other established risk factors.
authors.affiliation: College of Medicine, National Taiwan University, Taipei, and the Physical Therapy Center of National Taiwan University Hospital, Taiwan.
authors.forename: Meng-Yueh
authors.initials: MY
authors.lastname: Chien
authors.affiliation: Department of Psychiatry and Center of Sleep Disorders, National Taiwan University Hospital, Taiwan.
authors.forename: Hsi-Chung
authors.initials: HC
authors.lastname: Chen
mesh_terms: D000203:Activities of Daily Living; D000368:Aged; D000369:Aged, 80 and over; D003430:Cross-Sectional Studies; D003863:Depression / Q000150:complications; D006233:Persons with Disabilities / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D009483:Neuropsychological Tests; D011569:Psychiatric Status Rating Scales; D012307:Risk Factors; D012893:Sleep Wake Disorders / Q000150:complications*
keywords: Older adults; functional capacity; physical disability; sleep quality