Development of traditional Chinese version of World Health Organization Disability Assessment Schedule 2.0 36 – item (WHODAS 2.0) in Taiwan: Validity and reliability analyses

•To formulate Chinese version of WHODAS 2.0–36 item, and to test its validity and reliability.•The reliability of Cronbach's α and ICC in Chinese version WHODAS 2.0 were 0.73–0.99, and 0.8–089.•The content validity was good (r=0.7–0.76) and the concurrent validity was excellence.•The study divided into 7 factors and explained total variance was 67.26% in exploratory factor analysis.•The Chinese version of WHODAS 2.0 was a valid and reliable instrument for function and disability measurement. World Health Organization Disability Assessment Schedule 2.0 (WHODAS 2.0) provided a standardized method for measuring the health and disability and the traditional Chinese version has not been developed. To describe the process of developing the traditional Chinese version of the WHODAS 2.0 36-item version and to evaluate the concurrent validity and test–retest reliability of this instrument. The study was conducted in two phases. Phase I was the process of translation of WHODAS 2.0 36-item version. Phase II was a cross-sectional study. The participants were 307 adults who were tested the validity and reliability of draft traditional Chinese version. The reliability of Cronbach's α and ICC in the WHODAS 2.0 traditional Chinese version were 0.73–0.99 and 0.8–089, respectively. The content validity was good (r=0.7–0.76), and the concurrent validity was excellent in comparison with the WHOQOL-BREF (p