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).