[Confirmative factor analysis in the health literacy questionnaire and its applications in Chinese residents].
OBJECTIVE
To evaluate construct validity of China residents health literacy questionnaire and explore the application of confirmative factor analysis (CFA) in health literacy measurements.


METHODS
CFA was performed on dimension of basic healthy skills in the questionnaire. Latent variable scores and comprehensive score based on factor variance weight were calculated. Comparison among the latent variable scores, comprehensive scores and proportion of knowing was conducted via GLM or Logistic model.


RESULTS
Two factors named general capacity and emergency capacity were well fitted (chi(2)=12.12, P=0.356, IFI=0.998, TLI=0.996, RMSEA=0.007). According to comprehensive score the sample qualification rate of basic health literacy was 38.5%(785/2 040), much similar to 38.2% (780/2 040) which is calculated by original item scores. Latent variable score or comprehensive score has more statistical power than that of proportion of knowing in multivariate analysis.


CONCLUSIONS
CFA is a useful tool and valuable for applying in the field of health literacy measurement and analysis.
Zheng
Ying-dong
YD
Department of Epidemiology and Biostatistics, Peking University School of Public Health, Beijing 100191, China. zhengyd@tom.com
Shi
Jian-hui
JH
Cao
Ruo-xiang
RX
D000293:Adolescent; D000328:Adult; D000368:Aged; D002681:China; D005163:Factor Analysis, Statistical; D005260:Female; D007722:Health Knowledge, Attitudes, Practice; D006293:Health Promotion; D006304:Health Status; D006801:Humans; D008297:Male; D008875:Middle Aged; D011795:Surveys and Questionnaires; D055815:Young Adult