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J Audiol Otol > Epub ahead of print
DOI: https://doi.org/10.7874/jao.2022.00304    [Epub ahead of print] Published online September 19, 2022.
Effect of Aging on Speech Discrimination
Jiwon Choi  , Taeho Kim  , Sunhong Kim  , Yoonho Kim  , Dong-Kee Kim 
Department of Otolaryngology, Daejeon St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
Correspondence  Dong-Kee Kim ,Tel: +82-42-220-9273, Fax: +82-42-221-9580, Email: cider12@catholic.ac.kr
Submitted: July 18, 2022  Accepted after revision: August 18, 2022
Abstract
Background and Objectives
The aim of this study was to investigate the factors associated with decrease in speech discrimination ability seen in patients with presbycusis and whether aging has a significant effect on the observed decline.
Subjects and Methods
We retrospectively analyzed the medical records of patients aged >40 years who had undergone pure-tone audiometry, speech audiometry, and auditory brainstem response for hearing loss at our hospital from January 2019 to June 2021, and investigated the factors that correlated with speech discrimination score.
Results
We enrolled 103 patients with 120 ears, with a mean age of 65.8±11.9 years. The pure-tone average of the patients’ thresholds at 0.5, 1, 2, and 4 kHz was 37.2±27.7 dB HL, and their mean speech discrimination score was 82.5%± 22.3%. A correlation analysis revealed a significant negative correlation between the patients’ speech discrimination scores and age. In addition, all variables of pure-tone audiometry and the patients’ auditory brainstem responses were significantly correlated with the speech discrimination scores. The pure-tone average had the strongest negative correlation. On analyzing the significant predictors of lower speech discrimination scores, using a multiple linear regression analysis, pure-tone average and age showed significant results.
Conclusions
The speech discrimination ability of older patients with hearing loss significantly decreases with increasing pure-tone average and age.
Keywords: Presbycusis; Speech discrimination; Aging; Auditory perceptual disorder


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