Akademik Veri Yönetim Sistemi
Journal of Voice, 2024 (SCI-Expanded)
Objectives: A comprehensive evaluation is necessary for voice-related complaints, as it can benefit both the patient and physician in busy clinical settings. This study aimed to examine the Turkish adaptation of the Glottal Function Index (GFI-T), which can be quickly administered. Study designs: Phase 1 methodological, phase 2 prospective cohort. Methods: This study was conducted in two phases. Firstly, the GFI was translated into Turkish, and its content validity was examined. The GFI-T was administered to 40 participants with voice disorders (M = 41.3, SD = 10) in the study group and 40 participants without voice disorders (M = 37.5, SD = 11.3) in the control group. Then GFI-T was readministered 2 weeks later. The collected data were used for structural and convergent validity [correlation with Turkish version of the Voice Handicap Index-10 (VHI-10)], internal consistency, and test-retest reliability analyses. Secondly, 24 participants with vocal nodules were recruited separately from the first phase and were randomly divided into three groups. The first group underwent lax-vox therapy + vocal hygiene, the second group underwent resonance therapy + vocal hygiene, and the third group was provided only with vocal hygiene recommendations. The discriminative ability and construct validity of the GFI-T were examined by comparing pre- and post-assessments. Results: The results indicated that the content validity indexes were 0.98 in the experts and 0.99 in the participants. Confirmatory factor analysis of the scale confirmed that a single-factor structure and goodness-of-fit indices were suitable. The GFI-T correlated 0.92 with the Turkish version of the VHI-10. The internal consistency was 0.96, and the test-retest value was 0.99. Significant differences (P < 0.001) and correlations with the Turkish version of VHI-10 were found in intragroup comparisons. Conclusions: The GFI-T is a reliable and valid tool for the self-assessment of voice disorders. The adaptation of this study to the pediatric population is recommended.