Structure internal of the dimension Human Person of the Questionnaire of Health Vulnerability in Heart Failure.

OBJECTIVE: to analyze the evidence of validity of the internal structure of the dimension Human Person of the Questionnaire of Health Vulnerability in Heart Failure. METHOD: psychometric study with 1,008 people with heart failure, in a tertiary healthcare institution located in Northeastern Brazil. The internal structure was assessed by exploratory factor analysis with a polychoric correlation matrix, followed by confirmatory factor analysis to verify the quality of the model fit. Internal consistency was measured by composite reliability (CR) and McDonald's omega (ω). RESULTS: psychometric parameters revealed 22-item model, distributed in five factors, total explained variance of 64.9%, factor loadings (0.38 to 0.97) and adequate communalities (0.20 ≤ h2 ≤ 0.98) and acceptable indicators of precision (0.79 ≤ ORION ≤ 0.98), representativeness (0.89 ≤ FDI ≤ 0.99), sensitivity (1.92 ≤ SR ≤ 7.07), factor expectancy (88.3% ≤ EPTD ≤ 97.9%), replicability (0.82 ≤ H-latent ≤ 0.97; 0.81 ≤ H-observed ≤ 0.87) and reliability (CR = 0.92 and ω = 0.83). Adequate adjustment quality was achieved (TLI = 0.99; CFI = 0.99; GFI = 0.99; RMSEA = 0.04 and RMSR = 0.04). CONCLUSION: We obtained an instrument with good evidence of internal structure validity for construct measurement.