Psychometric properties of Japanese version of the Recovering Quality of Life (ReQoL)

Abstract

Purpose: This study aims to examine the psychometric properties of the Recovering Quality of Life– Japanese version (ReQoL-J) for use in the community setting. Methods: This cross-sectional study was conducted among service users of community mental health service facilities. A series of confirmatory factor analyses (CFAs) was performed. After the best-fitting model was identified, omega indices, and intraclass correlation (ICC) were calculated to evaluate dimensionality and reliability. The correlation coefficients between the ReQoL-J scores and the other scales were calculated for testing construct validity. We also estimated the correlation coefficients between the ReQoL-J-10 and − 20. Results: A total of 395 service users from 23 facilities in Japan participated in this study. Of these, 66 responded to the test-retest reliability. The bifactor model showed the best fit to the data: χ2/df = 1.74, CFI = 0.993, RMSEA = 0.031, and SRMR = 0.038. ECV and OmegaH indicated unidimensionality. ICC for the Re-QoL-J-10 and − 20 were 0.700 and 0.766, respectively. The ReQoL-J-10 showed a high correlation with the ReQoL-J-20 (r =.95, p