Glottal function index questionnaire for screening of pediatric dysphonia

to assess the diagnostic value of Lithuanian version of Glottal Function Index (GFI-LT) questionnaire in pediatric dysphonia screening. The GFI-LT was completed by 82 children (7–16 years old): 41 patients with voice disorders (patients group) and 41 healthy subjects (control group). Auditory-perceptual evaluation of voice was performed using the Grade Roughness Breathiness (GRB) protocol. Acoustic voice analysis was accomplished for F0, SDF0, jitter, shimmer and NNE using Dr. Speech, Tiger Elemetrics software. To evaluate the diagnostic accuracy differentiating normal and dysphonic voice, the receiver operating characteristic statistics were used. Perceptually dysphonia was revealed in all children of the patients group. Grade I (65.9%) was the most prevalent (p > 0.05). No dysphonia was detected in the control group. Acoustic voice analysis revealed statistically significantly (p