Psychometric properties of the Japanese version of the Kansas City Cardiomyopathy Questionnaire in Japanese patients with chronic heart failure

Health and Quality of Life Outcomes
Emi Watanabe-FujinumaBurkert Pieske

Abstract

Heart failure is a worldwide health problem that significantly affects patients' physical function and health state. The Kansas City Cardiomyopathy Questionnaire (KCCQ) is a disease-specific patient-reported outcome measure commonly used for the assessment of health states of patients with heart failure. This study aimed to evaluate the psychometric properties of the Japanese version of the KCCQ. Using pooled data of 141 Japanese patients with chronic heart failure from three clinical trials, the Japanese version of the KCCQ was evaluated for validity and reliability, with a focus on the clinical summary score (CSS) and its component domains. For construct validity, the associations of baseline KCCQ scores with New York Heart Association (NYHA) class and the EuroQol five-dimension, three-level (EQ-5D-3L) scores at baseline were analyzed. For reliability, internal consistency was assessed using Cronbach's α, and test-retest reliability (reproducibility) was assessed among stable patients. Responsiveness to changes in patients' clinical status was assessed by analyzing score changes between two timepoints among patients whose health states improved. Among 141 patients (mean age, 73.7 ± 10.9 years), 76.6% were NYHA class II at bas...Continue Reading

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