Objectives: This study aims to analyze the Dysphonia Severity Index (DSI) in Brazilians with or without voice disorders and investigate DSI's correlation with gender and auditory-perceptual evaluation data obtained via the Consensus Auditory-Perceptual Evaluation of Voice (CAPE-V) protocol.
Study design: A total of 66 Brazilian adults from both genders participated in the study, including 24 patients with dysphonia confirmed on laryngeal examination (dysphonic group [DG]) and 42 volunteers without voice or hearing complaints and without auditory-perceptual voice disorders (nondysphonic group [NDG]).
Methods: The vocal tasks included in CAPE-V and DSI were performed and recorded. Data were analyzed by means of the independent t test, the Mann-Whitney U test, and Pearson correlation at the 5% significance level.
Results: Differences were found in the mean DSI values between the DG and the NDG. Differences were also found in all DSI items between the groups, except for the highest frequency parameter. In the DG, a moderate negative correlation was detected between overall dysphonia severity (CAPE-V) and DSI value, and between breathiness and DSI value, and a weak negative correlation was detected between DSI value and roughness. In the NDG, the maximum phonation time was higher among males. In both groups, the highest frequency parameter was higher among females.
Conclusions: The DSI discriminated among Brazilians with or without voice disorders. A correlation was found between some aspects of the DSI and the CAPE-V but not between DSI and gender.
Keywords: Dysphonia Severity Index (DSI); acoustic analysis; dysphonia; voice perceptual evaluation; voice quality.
Copyright © 2016 The Voice Foundation. Published by Elsevier Inc. All rights reserved.