AIM: . This paper is a report of a study to test the psychometric properties of the Brazilian Version of the MacNew Heart Disease Health-related Quality of Life Questionnaire. BACKGROUND: Evidence of acceptable psychometric properties of the original MacNew questionnaire has been reported. However, the psychometric performance of the Brazilian version has not been extensively studied. METHOD: Between November 2004 and June 2005, 159 patients with myocardial infarction completed the Brazilian version of the instrument. Reliability was determined with Cronbach's alpha coefficient; convergent validity with Pearson's correlation between the Brazilian MacNew questionnaire and the SF-36; and the 'known-group' approach was used to test discriminant validity. Ceiling and floor effects and practicality were analyzed. FINDINGS: It took an average of 8.9 minutes to complete the instrument. A ceiling effect was detected in the subscales and global scores, with no floor effect. Cronbach's alpha coefficient ranged from 0.87 to 0.92. Scores on similar domains of the SF-36 and the MacNew questionnaire were correlated (r = 0.66; 0.78 and 0.53 for the physical, emotional, and social domains). Correlation between the dissimilar SF-36 mental health and MacNew physical domains was lower at 0.45; correlation between the dissimilar SF-36 physical functioning and MacNew emotional domain was 0.64. Individuals without regional ventricular dysfunction or symptoms had statistically significantly higher scores than those with regional ventricular dysfunction or symptoms. CONCLUSION: The Brazilian version of the MacNew questionnaire has acceptable levels of validity, reliability and practicality. Further studies are advisable to confirm its divergent validity and to test its responsiveness.
AIM: . This paper is a report of a study to test the psychometric properties of the Brazilian Version of the MacNew Heart Disease Health-related Quality of Life Questionnaire. BACKGROUND: Evidence of acceptable psychometric properties of the original MacNew questionnaire has been reported. However, the psychometric performance of the Brazilian version has not been extensively studied. METHOD: Between November 2004 and June 2005, 159 patients with myocardial infarction completed the Brazilian version of the instrument. Reliability was determined with Cronbach's alpha coefficient; convergent validity with Pearson's correlation between the Brazilian MacNew questionnaire and the SF-36; and the 'known-group' approach was used to test discriminant validity. Ceiling and floor effects and practicality were analyzed. FINDINGS: It took an average of 8.9 minutes to complete the instrument. A ceiling effect was detected in the subscales and global scores, with no floor effect. Cronbach's alpha coefficient ranged from 0.87 to 0.92. Scores on similar domains of the SF-36 and the MacNew questionnaire were correlated (r = 0.66; 0.78 and 0.53 for the physical, emotional, and social domains). Correlation between the dissimilar SF-36 mental health and MacNew physical domains was lower at 0.45; correlation between the dissimilar SF-36 physical functioning and MacNew emotional domain was 0.64. Individuals without regional ventricular dysfunction or symptoms had statistically significantly higher scores than those with regional ventricular dysfunction or symptoms. CONCLUSION: The Brazilian version of the MacNew questionnaire has acceptable levels of validity, reliability and practicality. Further studies are advisable to confirm its divergent validity and to test its responsiveness.
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