Investigation of Validity and Reliability of Voice Activity and Participation Profile-Turkish Version (VAPP-TR)

A voice activity and participation profile (VAPP) is a self-assessment tool used to measure activity and participation limitations resulting from voice disorders. This study aims to demonstrate the adaptation, validity, and reliability of the Turkish version of the VAPP scale. A total of 231 individuals, 155 with voice disorders (patient group) and 76 without voice disorders (normal group), were included in this study. With reliability, internal consistency, and test-retest methods; validity was evaluated with criterion and convergent validity methods. The Cronbach α coefficient calculated for internal consistency was found to be 0.985 for the VAPP total and between 0.914 and 0.978 for the subsections. Intraclass Correlation Coefficient was found to be 0.974 for the VAPP total and between 0.800 and 0.981 for the subsections. Total and subsection scores of the VAPP scale had correlation coefficients ranged between 0.725 and 0.903 with VHIT and V-RQOLT in the whole sample (all P<0.001). The cut-off point was determined as ≥ 8 by ROC curve analysis for criterion validity. VAPP-TR is a valid and reliable tool that can be used to evaluate the quality of life of Turkish patients with voice disorders, particularly those with activity limitations and participation restrictions.