title: Effect of self-reported quality of sleep on mobility in older adults.
abstract: OBJECTIVE
  Quality of sleep (QOS) has been shown to have an affect on mental and physical well-being, and quality of life. However, few studies have investigated how sleep affects mobility in older adults. The aim of the present study was to examine the relationship between QOS and mobility disorder (MD) in community-dwelling older adults.
  
  
  METHODS
  Data collected through self-administered questionnaires was analyzed for 4564 Japanese older adults. Sleep outcomes included two self-reported questions regarding QOS. Logistic regression analysis was used to analyze the association between sleep and MD both by the QOS questions independently and grouped together by the two QOS questions into three groups: often sleeps well and good awakening (GG), does not often sleep well and bad awakening (BB) and a group with one of each (GB/BG).
  
  
  RESULTS
  After adjustment for age, sex and depression, both those who did not often sleep well and those with poor awakening were more likely to show MD (OR 1.45, 95% CI 1.29-1.75), (OR 1.77, 95% CI 1.50-2.08), respectively. When grouped by both questions, those in the BB group had the least favorable outcome with increased odds ratio for possessing a MD (OR 1.95, 95% CI 1.61-2.37), compared with GB group (OR 1.40, 95% CI 1.18-1.67).
  
  
  CONCLUSIONS
  Often sleeping well and good morning awakening were both associated with MD, suggesting that self reported QOS is associated with MD. Further research is required to investigate whether improving sleep quality could be a possible means of preventing and reversing MD in older adults.
authors.affiliation: Department of Human Health Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan.
authors.forename: Katarzyna B
authors.initials: KB
authors.lastname: Malinowska
authors.affiliation: Department of Human Health Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan.
authors.forename: Mika
authors.initials: M
authors.lastname: Okura
authors.affiliation: Department of Health Science, Kyoto Koka Women's University, Kyoto, Japan.
authors.forename: Mihoko
authors.initials: M
authors.lastname: Ogita
authors.affiliation: Kami-cho Municipal Office, Kami, Japan.
authors.forename: Miki
authors.initials: M
authors.lastname: Yamamoto
authors.affiliation: Kami-cho Municipal Office, Kami, Japan.
authors.forename: Toshimi
authors.initials: T
authors.lastname: Nakai
authors.affiliation: Kami-cho Municipal Office, Kami, Japan.
authors.forename: Tomoko
authors.initials: T
authors.lastname: Numata
authors.affiliation: Department of Human Health Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan.
authors.forename: Tadao
authors.initials: T
authors.lastname: Tsuboyama
authors.affiliation: Department of Human Health Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan.
authors.forename: Hidenori
authors.initials: H
authors.lastname: Arai
mesh_terms: D000203:Activities of Daily Living; D000368:Aged; D000369:Aged, 80 and over; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D011788:Quality of Life; D057566:Self Report; D012890:Sleep
keywords: frailty; mobility disorder; physical function; quality of sleep