title: Reliability and validity of 12-item Short-Form health survey (SF-12) for the health status of Chinese community elderly population in Xujiahui district of Shanghai.
abstract: BACKGROUND
  The 12-item Short-Form Health Survey (SF-12) is the abridged practical version of SF-36.
  
  
  OBJECTIVE
  This cross-sectional study was aimed to assess the reliability and validity of SF-12 for the health status of Chinese community elderly population.
  
  
  METHODS
  The Chinese community elderly people in Xujiahui district of Shanghai were investigated. The internal consistency reliability was assessed using Cronbach's alpha and split-half reliability coefficients. Construct validity was analyzed using exploratory factor analysis (EFA) and confirmatory factor analysis (CFA). Spearman's correlation coefficient (ρ) was used for the evaluation of criterion, convergent, and discriminant validity with Spearman's ρ ≥ 0.4 as satisfactory. Comparisons of the SF-12 summary scores among populations that differed in demographics were performed for discriminant validity.
  
  
  RESULTS
  Total 1343 individuals aged ≥60 and <85 years old (response rate: 91.3 %) were analyzed. The Cronbach's α value (0.910) and the split-half reliability coefficient (0.812) reflected satisfactory internal consistency reliability of SF-12. EFA extracted a two-factor model (physical and mental health). About 60.7 % of the total variance was explained by the two factors. CFA showed that the two-factor solution provided a good fit to the data. Good convergent validity and discriminant validity of SF-12 were proved by the correction analyses (Spearman's ρ > 0.4) and the comparisons of the SF-12 summary scores among populations (P < 0.05). SF-12 summary scores were significantly correlated with the SF-36 summary scores (Spearman's ρ > 0.4, P < 0.05).
  
  
  CONCLUSIONS
  In conclusion, SF-12 had satisfactory reliability and validity in measuring health status of Chinese community elderly population in Xujiahui district of Shanghai.
authors.affiliation: Department of General Practice, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai, 200032, People's Republic of China.
authors.forename: Juan
authors.initials: J
authors.lastname: Shou
authors.affiliation: Department of General Practice, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai, 200032, People's Republic of China.
authors.forename: Limin
authors.initials: L
authors.lastname: Ren
authors.affiliation: Department of General Practice, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai, 200032, People's Republic of China.
authors.forename: Haitang
authors.initials: H
authors.lastname: Wang
authors.affiliation: Department of General Practice, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai, 200032, People's Republic of China.
authors.forename: Fei
authors.initials: F
authors.lastname: Yan
authors.affiliation: Department of General Practice, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai, 200032, People's Republic of China.
authors.forename: Xiaoyun
authors.initials: X
authors.lastname: Cao
authors.affiliation: Xu Jiahui Community Health Center, Shanghai, 200030, People's Republic of China.
authors.forename: Hui
authors.initials: H
authors.lastname: Wang
authors.affiliation: Xu Jiahui Community Health Center, Shanghai, 200030, People's Republic of China.
authors.forename: Zhiliang
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Department of General Practice, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai, 200032, People's Republic of China. shanzhuzhuszz@163.com.
authors.forename: Shanzhu
authors.initials: S
authors.lastname: Zhu
authors.affiliation: Department of General Practice, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai, 200032, People's Republic of China. yao_liuliu@163.com.
authors.forename: Yao
authors.initials: Y
authors.lastname: Liu
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D044466:Asian People / Q000523:psychology / Q000706:statistics & numerical data; D002681:China / Q000453:epidemiology; D003430:Cross-Sectional Studies; D005260:Female; D015577:Geriatric Assessment / Q000379:methods; D054624:Health Status Disparities; D006306:Health Surveys; D006801:Humans; D008297:Male; D008603:Mental Health / Q000706:statistics & numerical data; D008875:Middle Aged; D010808:Physical Examination; D011788:Quality of Life; D015203:Reproducibility of Results
keywords: 12-Item Short-Form Health Survey; Chinese community elderly population; Health status; Reliability; Validity