Mandarin (Simplified) Chinese Version of the Voice Activity and Participation Profile: Adaptation and Validation

Objective. The purpose of this study was to evaluate the reliability and validity of the Mandarin (simplified) Chinese version of Voice Activity and Participation Profile (MC-VAPP) in mainland China. Methods. This study enrolled 786 subjects from February 2015 to March 2017, including 456 individuals with voice disorders (dysphonic group) and 330 vocally healthy individuals (nondysphonic group). The internal consistency (Cronbach alpha coefficient), test-retest reliability (intraclass correlation coefficient [ICC]), and differences in the MC-VAPP scores were compared between the two groups. Exploratory factor analysis was performed. The receiver operating characteristic curve and cutoff point were calculated. Results. The MC-VAPP had a high internal consistency. Cronbach alpha coefficients for the subsection scores were from 0.86 and 0.96, with 0.98 for the total score. Test-retest reliability was high for the total score (ICC = 0.98). The four factors' cumulative contribution was determined to be 74.68%. The dysphonic participants displayed significantly higher total score and subsection scores than the nondysphonic participants (P < 0.001). There were significant differences in total activity limitation scores and the total participation restriction scores between the two groups (P < 0.001). The cutoff point for screening between the two groups was 36.5, with a sensitivity of 76.80% and specificity of 80.30%. Conclusion. The MC-VAPP is a reliable and valid instrument for the evaluation of voice-related quality of life in Chinese-speaking individuals. It is also recommended that the MC-VAPP would be a useful tool for screening individuals with and without voice disorders based on the cutoff value of 36.5.