Reliability and validity of the Chinese version of the chronic oral mucosal diseases questionnaire.

INTRODUCTION

The aim of this study was to evaluate the reliability and validity of the Chinese version of the Chronic Oral Mucosal Diseases Questionnaire (COMDQ).

METHODS

A consecutive sample of 200 patients with chronic oral mucosal diseases was enrolled to complete the questionnaire after its translation and cross-cultural adaptation. The reliability of the Chinese version of COMDQ was determined through internal consistency and test-retest methods. The construct validity of COMDQ was analysed by exploratory factor analysis (EFA).

RESULTS

Cronbach's alpha value for the total COMDQ score was 0.894, and the test-retest intraclass correlation coefficient value for the total COMDQ score was 0.83. The EFA extracted four factors, which accounted for 67.89% of the variance. All items showed adequate factor loadings, ranging from 0.487 to 0.947.

CONCLUSION

The results suggest that the Chinese version of the COMDQ has satisfactory psychometric properties and is applicable to patients with chronic oral mucosal diseases in China.