Adaptation and Validation of the Voice Symptom Scale into Kannada (VoiSS-K)

The Voice Symptom Scale (VoiSS) is a self-assessment tool that assesses vocal symptoms and measures the effect of dysphonia. Adapting VoiSS into Kannada can be beneficial in evaluating dysphonia-related symptoms, especially in the Kannada-speaking population.

To adapt the VoiSS into Kannada and to assess the reliability, validity, and cut-off values of the VoiSS Kannada version (VoiSS-K).

The study used a prospective nonrandomized standard group comparison.

Initially, the VoiSS was translated into Kannada. The VoiSS-K was administered to 76 participants (34 females and 42 males) with a mean age of 46.4 ± 14.5 years having voice disorders. The VoiSS-K was also administered to 76 respondents having clinically normal voice who were age and gender-matched to the participants with voice disorders.

Cronbach's alpha was utilized to evaluate the internal consistency, and the intraclass correlation coefficient to evaluate the test-retest reliability. The findings indicated that the VoiSS-K had excellent test-retest reliability and internal consistency. The study group participants had significantly higher VoiSS-K scores than the control group participants. Thus, the outcomes indicated that the VoiSS-K had good discriminative validity. Receiver operating characteristic curve analysis was conducted, and the cut-off score of VoiSS-K was 40.50.

As the VoiSS-K is a rigorous, robust, and detailed self-assessment questionnaire, it can be used as a clinically sensitive tool to evaluate voice symptoms in Kannada-speaking individuals.