title: The Relationship of Sleep Duration with Obesity and Sarcopenia in Community-Dwelling Older Adults.
abstract: BACKGROUND
  Numerous studies have reported the relationship between sleep duration and obesity in elderly adults; however, little is known about the relationship of sleep duration and sarcopenia.
  
  
  OBJECTIVE
  We examined the relationship of sleep duration with obesity and sarcopenia in community-dwelling older adults.
  
  
  METHODS
  A total of 488 community-dwelling adults (224 men and 264 women) aged ≥65 years were included in the analysis. Self-reported sleep duration and anthropometric data were collected. Skeletal muscle mass was estimated using the predicted equation from a bioelectrical impedance analysis measurement. Obesity and sarcopenia were defined according to the body mass index and the skeletal muscle mass index, respectively.
  
  
  RESULTS
  The association between sleep duration and sarcopenia exhibited a U shape in older adults. Compared to adults with 6-8 h of sleep, adults with <6 h of sleep had a nearly 3-fold increased likelihood of sarcopenia (odds ratio, OR: 2.76, 95% confidence interval, CI: 1.28-5.96), while adults with ≥8 h of sleep had a nearly 2-fold increased risk of sarcopenia (OR: 1.89, 95% CI: 1.01-3.54). Older adults with a sleep duration <6 h were more prone to obesity (OR: 2.15, 95% CI: 1.08-4.30). After gender stratification, the association between obesity and short sleep duration was more robust in women.
  
  
  CONCLUSIONS
  There were significant associations of sleep duration with either obesity or sarcopenia in community-dwelling older adults. Gender differences in these associations were also observed.
authors.affiliation: School and Graduate Institute of Physical Therapy, College of Medicine, National Taiwan University, Taipei, Taiwan, ROC.
authors.forename: Meng-Yueh
authors.initials: MY
authors.lastname: Chien
authors.forename: Li-Ying
authors.initials: LY
authors.lastname: Wang
authors.forename: Hsi-Chung
authors.initials: HC
authors.lastname: Chen
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000473:pathology* / Q000502:physiology*; D015331:Cohort Studies; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D009765:Obesity / Q000209:etiology* / Q000473:pathology / Q000503:physiopathology; D055948:Sarcopenia / Q000209:etiology* / Q000473:pathology / Q000503:physiopathology; D012737:Sex Factors; D012890:Sleep / Q000502:physiology*; D012893:Sleep Wake Disorders / Q000150:complications / Q000473:pathology / Q000503:physiopathology