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Thyroid-Stimulating Hormone and Free Thyroxine Alterations in Subjects with Occupational Hearing Loss

CONTEXT AND AIM: Occupational hearing loss (OHL) is caused by exposure to industrial noise. Alterations in the thyroid-stimulating hormone (TSH) and free thyroxine (FT4) levels are related to hearing loss. The purpose of this study is to investigate the TSH and FT4 level alterations in OHL. METHODS...

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Autores principales: Ranjbar, Nastaran, Arefi, Hossein Namvar, Maarefvand, Mohammad, Pourbakht, Akram, Shahbazi, Ali
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Wolters Kluwer - Medknow 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8259583/
https://www.ncbi.nlm.nih.gov/pubmed/34295055
http://dx.doi.org/10.4103/ijoem.IJOEM_101_19
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author Ranjbar, Nastaran
Arefi, Hossein Namvar
Maarefvand, Mohammad
Pourbakht, Akram
Shahbazi, Ali
author_facet Ranjbar, Nastaran
Arefi, Hossein Namvar
Maarefvand, Mohammad
Pourbakht, Akram
Shahbazi, Ali
author_sort Ranjbar, Nastaran
collection PubMed
description CONTEXT AND AIM: Occupational hearing loss (OHL) is caused by exposure to industrial noise. Alterations in the thyroid-stimulating hormone (TSH) and free thyroxine (FT4) levels are related to hearing loss. The purpose of this study is to investigate the TSH and FT4 level alterations in OHL. METHODS AND MATERIAL: Among 428 subjects, 144 male workers with normal hearing (NH), noise-induced hearing loss (NIHL), and high tone loss (HTL) (N = 48 in each group) were included in this study. All the subjects had normal TSH and FT4 levels. RESULTS: The TSH level is higher in the HTL and NIHL groups in comparison to NH, but it is only significant in the HTL group. The FT4 level is significantly lower in the NIHL group; however, the lower FT4 level in the HTL group is not significant when compared to the NH group. DISCUSSION: The NIHL group may turn into the HTL group over time. This process could be monitored by alteration in their TSH and FT4 levels. CONCLUSIONS: Alterations in the TSH and FT4 levels could be considered as a pathophysiology for OHL. More research is required to investigate the electrophysiological, physiological, and histological correlations of TSH and FT4 and different types of hearing loss caused by noise exposure.
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spelling pubmed-82595832021-07-21 Thyroid-Stimulating Hormone and Free Thyroxine Alterations in Subjects with Occupational Hearing Loss Ranjbar, Nastaran Arefi, Hossein Namvar Maarefvand, Mohammad Pourbakht, Akram Shahbazi, Ali Indian J Occup Environ Med Original Article CONTEXT AND AIM: Occupational hearing loss (OHL) is caused by exposure to industrial noise. Alterations in the thyroid-stimulating hormone (TSH) and free thyroxine (FT4) levels are related to hearing loss. The purpose of this study is to investigate the TSH and FT4 level alterations in OHL. METHODS AND MATERIAL: Among 428 subjects, 144 male workers with normal hearing (NH), noise-induced hearing loss (NIHL), and high tone loss (HTL) (N = 48 in each group) were included in this study. All the subjects had normal TSH and FT4 levels. RESULTS: The TSH level is higher in the HTL and NIHL groups in comparison to NH, but it is only significant in the HTL group. The FT4 level is significantly lower in the NIHL group; however, the lower FT4 level in the HTL group is not significant when compared to the NH group. DISCUSSION: The NIHL group may turn into the HTL group over time. This process could be monitored by alteration in their TSH and FT4 levels. CONCLUSIONS: Alterations in the TSH and FT4 levels could be considered as a pathophysiology for OHL. More research is required to investigate the electrophysiological, physiological, and histological correlations of TSH and FT4 and different types of hearing loss caused by noise exposure. Wolters Kluwer - Medknow 2021 2021-04-26 /pmc/articles/PMC8259583/ /pubmed/34295055 http://dx.doi.org/10.4103/ijoem.IJOEM_101_19 Text en Copyright: © 2021 Indian Journal of Occupational and Environmental Medicine https://creativecommons.org/licenses/by-nc-sa/4.0/This is an open access journal, and articles are distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as appropriate credit is given and the new creations are licensed under the identical terms.
spellingShingle Original Article
Ranjbar, Nastaran
Arefi, Hossein Namvar
Maarefvand, Mohammad
Pourbakht, Akram
Shahbazi, Ali
Thyroid-Stimulating Hormone and Free Thyroxine Alterations in Subjects with Occupational Hearing Loss
title Thyroid-Stimulating Hormone and Free Thyroxine Alterations in Subjects with Occupational Hearing Loss
title_full Thyroid-Stimulating Hormone and Free Thyroxine Alterations in Subjects with Occupational Hearing Loss
title_fullStr Thyroid-Stimulating Hormone and Free Thyroxine Alterations in Subjects with Occupational Hearing Loss
title_full_unstemmed Thyroid-Stimulating Hormone and Free Thyroxine Alterations in Subjects with Occupational Hearing Loss
title_short Thyroid-Stimulating Hormone and Free Thyroxine Alterations in Subjects with Occupational Hearing Loss
title_sort thyroid-stimulating hormone and free thyroxine alterations in subjects with occupational hearing loss
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8259583/
https://www.ncbi.nlm.nih.gov/pubmed/34295055
http://dx.doi.org/10.4103/ijoem.IJOEM_101_19
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