Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Psychometric evaluation of the SF-36 () questionnaire in a probability sample of Brazilian households: results of the survey Pesquisa Dimensões Sociais das Desigualdades (PDSD), Brazil, 2008 | Laguardia et al. Health and Quality of Life Outcomes 2011 9 61 http content 9 1 61 HEALTH AND QUALITY OF LIFE OUTCOMES RESEARCH Open Access Psychometric evaluation of the SF-36 questionnaire in a probability sample of Brazilian households results of the survey Pesquisa Dimensões Sociais das Desigualdades PDSD Brazil 2008 1 2 1 23 Josué Laguardia Monica R Campos Claudia M Travassos Alberto L Najar Luiz A Anjos and Miguel M Vasconcellos2 Abstract Background In Brazil despite the growing use of SF-36 in different research environments most of the psychometric evaluation of the translated questionnaire was from studies with samples of patients. The purpose of this paper is to examine if the Brazilian version of SF-36 satisfies scaling assumptions reliability and validity required for valid interpretation of the SF-36 summated ratings scales in the general population. Methods 12 423 individuals and their spouses living in 8 048 households were selected from a stratified sample of all permanent households along the country to be interviewed using the Brazilian SF-36 version 2 . Psychometric tests were performed to evaluate the scaling assumptions based on IQOLA methodology. Results Data quality was satisfactory with questionnaire completion rate of 100 . The ordering of the item means within scales clustered as hypothesized. All item-scale correlations exceeded the suggested criteria for reliability with success rate of 100 and low floor and ceiling effects. All scales reached the criteria for group comparison and factor analysis identified two principal components that jointly accounted for of the total variance. Role emotional and vitality were strongly correlated with physical and mental components respectively while social functioning was moderately correlated with both components. Role physical and mental health scales were respectively the most valid measures of the physical and mental health component. In the comparisons between groups that .
