Propriedades psicométricas do índice de vulnerabilidade clínico-funcional-20 na atenção primária à saúde

Abstract

Objective: to analyze the psychometric properties of the Clinical-Functional Vulnerability Index - 20 in Primary Health Care. Method: methodological, analytical study, with a quantitative approach with 396 elderly people. Analyzed based on the Item Response Theory, a two-parameter logistic model was used - difficulty and discrimination. Construct validity and validity of concurrent criteria were verified. Reliability and precision were assessed by Cronbach's alpha and biserial correlation. Unidimensionality was verified throughexploratory factor analysis. Results: all items showed a positive biserial correlation with the latent variable. The first factor explained 20% of the total variance; the parameters for construct validity and concurrent criteria were considered adequate. The general Cronbach's alpha was 0.73. Conclusion:the Clinical Functional Vulnerability Index - 20 has satisfactory psychometric qualities, being a valid and consistent instrument for screening frailty in the elderly in Primary Health Care.