title: Estimation of prevalence of sarcopenia by using a new bioelectrical impedance analysis in Chinese community-dwelling elderly people.
abstract: The aim of the present study was to validate the usefulness of the new octapolar multifrequency bioelectrical impedance analysis (BIA) for assessment of appendicular skeletal muscle mass (ASM) by comparing it with that of dual-energy X-ray absorptiometry (DXA) and to investigate the prevalence of sarcopenia in Chinese community-dwelling elderly according to Asian Working Group for Sarcopenia (AWGS) definition.
  
  
  
  A cross-sectional study was conducted in communities of Chengdu, China. A total of 944 community-dwelling elderly adults aged ≥60 years were included. ASM was measured by using DXA as a criterion method to validate a standing eight-electrode multifrequency BIA (InBody 720), followed by a further estimation of the prevalence of sarcopenia according the AWGS definition.
  
  
  
  In the Bland-Altman analysis, no significant difference was found between DXA and BIA based on the ASM measurements. The prevalence of AWGS-defined sarcopenia was 12.5% in the elderly women and 8.2% in the elderly men.
  
  
  
  BIA is suitable for body composition monitoring (ASM) in elderly Chinese as a fast, noninvasive, and convenient method; therefore, it may be a better choice in large epidemiological studies in the Chinese population. The prevalence of AWGS-defined sarcopenia was approximately 10.4% and increased with age in the Chinese community-dwelling elderly in this study.
authors.affiliation: Center of Gerontology and Geriatrics, West China Hospital, Sichuan University, No. 37 Guoxue Lane, Chengdu, 610041, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Wang
authors.affiliation: Center of Gerontology and Geriatrics, West China Hospital, Sichuan University, No. 37 Guoxue Lane, Chengdu, 610041, China.
authors.forename: Shan
authors.initials: S
authors.lastname: Hai
authors.affiliation: Center of Gerontology and Geriatrics, West China Hospital, Sichuan University, No. 37 Guoxue Lane, Chengdu, 610041, China.
authors.forename: Li
authors.initials: L
authors.lastname: Cao
authors.affiliation: School of Clinical Medicine, Chengdu Medical College, Chengdu, China.
authors.forename: Jianghua
authors.initials: J
authors.lastname: Zhou
authors.affiliation: Center of Gerontology and Geriatrics, West China Hospital, Sichuan University, No. 37 Guoxue Lane, Chengdu, 610041, China.
authors.forename: Ping
authors.initials: P
authors.lastname: Liu
authors.affiliation: Center of Gerontology and Geriatrics, West China Hospital, Sichuan University, No. 37 Guoxue Lane, Chengdu, 610041, China. birongdong@163.com.|Collaborative Innovation Center of Sichuan for Elderly Care and Health, Chengdu, China. birongdong@163.com.
authors.forename: Bi-Rong
authors.initials: BR
authors.lastname: Dong
mesh_terms: D015502:Absorptiometry, Photon / Q000379:methods; D000368:Aged; D001823:Body Composition / Q000502:physiology; D015992:Body Mass Index; D002681:China / Q000453:epidemiology; D003430:Cross-Sectional Studies; D017097:Electric Impedance; D005260:Female; D006801:Humans; D057187:Independent Living / Q000706:statistics & numerical data*; D008297:Male; D008875:Middle Aged; D018482:Muscle, Skeletal / Q000503:physiopathology*; D015995:Prevalence; D055948:Sarcopenia / Q000175:diagnosis / Q000453:epidemiology / Q000503:physiopathology
keywords: Appendicular skeletal muscle; Asian Working Group for Sarcopenia; Bioelectrical impedance analysis; Dual-energy X-ray absorptiometry; Elderly; Sarcopenia