Key result
The Korean version of the MacNew questionnaire demonstrated good reliability (Cronbach's α 0.947) and validity, establishing it as a useful tool for assessing health-related quality of life in Korean patients with coronary artery disease.
Why the study?
Myocardial infarction and unstable angina are prevalent in Korea, but the validity and reliability of the Korean version of the MacNew heart disease health-related quality of life questionnaire had not been tested.
Cross-Sectional (n=200)
No
The Korean version of the MacNew heart disease questionnaire is a valid and reliable patient-reported outcome measure for assessing health-related quality of life in Korean patients with coronary artery disease.
Supports HRQoL assessment with MacNew in Korean CAD patients; extends prior validations but leaves open responsiveness testing.
BACKGROUND: Myocardial infarction and unstable angina are prevalent in Korea. The MacNew Heart Disease health-related quality of life questionnaire is a widely used patient-reported outcome measure for patients with heart disease in several countries. In this study, we tested the validity and reliability of the Korean version of the MacNew (K-MacNew). METHODS: Participants were 200 patients who had experienced unstable angina or myocardial infarction, and were recruited from a tertiary hospital in Korea. The K-MacNew was developed using forward-backward translation techniques. Construct validity (including discriminative validity), concurrent validity, and internal consistency reliability of the K-MacNew were assessed. Discriminative validity was assessed by examining the between-group differences in the K-MacNew scores according to functional capacity, anxiety, and depression levels. Concurrent validity was examined by correlating the K-MacNew dimensions with the physical and mental health domains of the 36-item Short Form Health Survey Instrument (SF-36). RESULTS: Factor analysis results of the K-MacNew demonstrated a three-factor structure (emotional, physical, and social) that explained 57.92% of the variance. Significant differences in the K-MacNew scores were observed according to patients' functional capacity, anxiety, and depression levels. The SF-36 physical health domain score showed a moderate positive correlation with the physical dimension score of the K-MacNew (r = 0.517, P < 0.001), and the SF-36 mental health domain score showed a strong positive correlation with the emotional dimension of K-MacNew (r = 0.745, P < 0.001). The K-MacNew showed good internal consistency, with a Cronbach's α of 0.947 for the global scale. CONCLUSION: The K-MacNew demonstrated good reliability and validity for use as a patient-reported outcome measure and is ready for the assessment of the health-related quality of life of patients with coronary artery disease in Korea. To establish the clinical validity of the K-MacNew, additional studies should be conducted to verify the validity and reliability of the K-MacNew in a number of participants, including those with various types of coronary artery disease.
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Bae et al. (2021) conducted a cross-sectional in Coronary artery disease (unstable angina or myocardial infarction) (n=200). Korean version of the MacNew heart disease Health-related Quality of Life questionnaire (K-MacNew) was evaluated on Validity and reliability of the K-MacNew questionnaire. The Korean version of the MacNew questionnaire demonstrated good reliability (Cronbach's α 0.947) and validity, establishing it as a useful tool for assessing health-related quality of life in Korean patients with coronary artery disease.
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