Criterion validity
Criterion validity was tested by the convergent construct validity of the tool. To evaluate the convergent structure validity of the new scores, we calculated the Pearson correlation coefficients of the scores obtained from the new questionnaires and the WHOQOL-BREF and WHODAS 2.0 ̵36 items and compared the correlation coefficients. This comparison is meaningful because changes in activity limitations and participation restrictions are accompanied by changes in health-related QOL.34,35 The point-biserial correlation coefficient was used to calculate the correlations between the Chinese version of the WHOQOL-BREF, the Chinese version of the WHODAS 2.0 ̵̵36 items and the Chinese version of PaArticular Scales total score to establish concurrent validity. All the data were statistically analysed using the SPSS 22.0 software package (IBM, Armonk, NY, USA).