title: Prevalence of sarcopenia estimated using a bioelectrical impedance analysis prediction equation in community-dwelling elderly people in Taiwan.
abstract: OBJECTIVE
  To compare a bioelectrical impedance analysis (BIA) prediction equation for estimating skeletal muscle mass (SM) with magnetic resonance imaging (MRI)-measured SM and to investigate the prevalence of sarcopenia in community-dwelling elderly people in Taiwan.
  
  
  METHODS
  Cross-sectional survey.
  
  
  METHODS
  Communities in the district of Zhongzheng, Taipei.
  
  
  METHODS
  Forty-one volunteers (aged 22-90) for BIA equation validation; 302 individuals aged 65 and older and 200 adults aged 18 to 40 for the investigation of the prevalence of sarcopenia.
  
  
  METHODS
  Skeletal muscle mass was estimated using a BIA prediction equation and measured using MRI.
  
  
  RESULTS
  No statistical difference between MRI-measured and BIA-derived SM was observed (difference of -0.44 +/- 1.55 kg, P=.08). The prevalence of sarcopenia in was 18.6% in elderly women and 23.6% in elderly men.
  
  
  CONCLUSIONS
  Estimation of SM using a BIA equation was validated in Taiwanese volunteers. It was confirmed that sarcopenia is an emerging health problem in the aging population in Taiwan.
authors.affiliation: School and Graduate Institute of Physical Therapy, College of Medicine, National Taiwan University, Zhongzheng District, Taipei, Taiwan.
authors.forename: Meng-Yueh
authors.initials: MY
authors.lastname: Chien
authors.forename: Ta-Yi
authors.initials: TY
authors.lastname: Huang
authors.forename: Ying-Tai
authors.initials: YT
authors.lastname: Wu
mesh_terms: D000203:Activities of Daily Living; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001823:Body Composition; D001827:Body Height; D015992:Body Mass Index; D015897:Comorbidity; D003430:Cross-Sectional Studies; D017097:Electric Impedance; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008432:Mathematical Computing; D008875:Middle Aged; D008962:Models, Theoretical; D018482:Muscle, Skeletal / Q000473:pathology; D009133:Muscular Atrophy / Q000175:diagnosis / Q000453:epidemiology*; D012680:Sensitivity and Specificity; D012984:Software; D013624:Taiwan; D055815:Young Adult