Progressive Asymmetry in Occupational Noise-Induced Hearing Loss: A Large Population-Based Cohort Study With a 15-Year Follow-Up.

Publisher: AVES Country of Publication: Turkey NLM ID: 101522982 Publication Model: Print Cited Medium: Internet ISSN: 2148-3817 (Electronic) Linking ISSN: 13087649 NLM ISO Abbreviation: J Int Adv Otol Subsets: MEDLINE

Publication: <2016- > : İstanbul : AVES
Original Publication: Ankara : Mediterranean Society of Otology and Audiology

Hearing Loss, Noise-Induced*/diagnosis ; Hearing Loss, Noise-Induced*/epidemiology ; Hearing Loss, Noise-Induced*/etiology ; Noise, Occupational*/adverse effects ; Occupational Diseases*/diagnosis ; Occupational Diseases*/epidemiology ; Occupational Diseases*/etiology ; Occupational Exposure*/adverse effects; Cohort Studies ; Cross-Sectional Studies ; Follow-Up Studies ; Humans

Background: To evaluate interaural differences between the right and left ears at frequencies from 0.25 to 8 kHz in 3 groups of workers from metallurgy companies.
Methods: This study is a cross-sectional cohort study. Workers were divided into 3 groups: (1) workers without occupational noise exposure and normal audiometric testing; (2) workers with 10 years of occupational noise exposure; and (3) workers with 15 years of occupational noise exposure. The interaural difference from 0.25 to 8 kHz was measured in each group.
Results: A total of 2103 workers were included. Of these, 483 workers had been exposed to noise in the workplace for 10 years and 216 workers for 15 years. Group 1, only at 4 and 6 kHz, the difference was statistically significant. Group 2, only at 3 , 4 , and 6 kHz, the difference was statistically significant. Group 3, the difference was statistically significant at the frequencies from 2 to 8 kHz.
Conclusion: Asymmetry between the right and left ears was observed in all groups, with higher air-conduction thresholds in the left ear. It is important for otolaryngologists be aware that NIHL can also cause or accentuate asymmetry between the right and left ears over time.

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Date Created: 20220218 Date Completed: 20220221 Latest Revision: 20220415

20231215

PMC8975394

10.5152/iao.2021.21139

35177389