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The effect of diabetes on 4-year changes of hearing thresholds in male workers exposed to noise in a single company: a longitudinal study.
Ann Occup Environ Med 2019; 31:e11AO

Abstract

Background

Recently, several studies have assessed the association between diabetes and hearing impairment. However, the effect of diabetes on hearing impairment is not well known in diabetic patients exposed to noise, a typical cause of hearing impairment. The aim of this study is to longitudinally analyze the effect of diabetes on hearing impairment in workers exposed to similar noise levels from 2013 to 2017 who had experienced little change in their working conditions.

Methods

The study subjects included 2,087 male workers exposed to noise in a single company and who underwent health examinations at the same hospital in Ulsan city in 2013 and 2017. Hearing impairment was defined that a pure-tone average of pure-tone audiometry (PTA) thresholds at 1,000, 2,000, 3,000, and 4,000 Hz was 25 dB and over in both ears. Statistical analyses were conducted using χ2 tests, ANOVA, and Cox proportional hazard models. We analyzed covariates that might affect hearing impairment, including age; working period; levels of total cholesterol, triglyceride, and serum creatinine; smoking and alcohol history; and noise level.

Results

The average PTA thresholds and their average changes between 2013 and 2017 were significant in the diabetes mellitus (DM) group than those in the normal and impaired fasting glucose group. Among the subjects with the same status of fasting glucose group in 2013 and 2017, the adjusted hazard ratios for incident hearing impairment among those in the DM group compared to normal group were 3.35 (95% confidence interval [CI], 1.54-7.29) in the left ear and 5.66 (95% CI, 2.01-15.98) in the right ear.

Conclusions

This study suggested that the risk of hearing impairment in the DM group was significantly higher than that in the normal group in both ears, even when exposed to similar noise levels.

Authors+Show Affiliations

Department of Occupational and Environmental Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea.Department of Occupational and Environmental Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea.Department of Occupational and Environmental Medicine, Institute of Health Sciences, Gyeongsang National University Changwon Hospital, Gyeongsang National University College of Medicine, Jinju, Korea.Department of Occupational and Environmental Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea.Department of Occupational and Environmental Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31543972

Citation

Kim, Dae Yun, et al. "The Effect of Diabetes On 4-year Changes of Hearing Thresholds in Male Workers Exposed to Noise in a Single Company: a Longitudinal Study." Annals of Occupational and Environmental Medicine, vol. 31, 2019, pp. e11.
Kim DY, Kim AR, Sung JH, et al. The effect of diabetes on 4-year changes of hearing thresholds in male workers exposed to noise in a single company: a longitudinal study. Ann Occup Environ Med. 2019;31:e11.
Kim, D. Y., Kim, A. R., Sung, J. H., Lee, C. R., & Lee, J. (2019). The effect of diabetes on 4-year changes of hearing thresholds in male workers exposed to noise in a single company: a longitudinal study. Annals of Occupational and Environmental Medicine, 31, pp. e11. doi:10.35371/aoem.2019.31.e11.
Kim DY, et al. The Effect of Diabetes On 4-year Changes of Hearing Thresholds in Male Workers Exposed to Noise in a Single Company: a Longitudinal Study. Ann Occup Environ Med. 2019;31:e11. PubMed PMID: 31543972.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The effect of diabetes on 4-year changes of hearing thresholds in male workers exposed to noise in a single company: a longitudinal study. AU - Kim,Dae Yun, AU - Kim,A Ram, AU - Sung,Joo Hyun, AU - Lee,Choong Ryeol, AU - Lee,Jiho, Y1 - 2019/06/28/ PY - 2019/01/08/received PY - 2019/06/12/accepted PY - 2019/9/24/entrez PY - 2019/9/24/pubmed PY - 2019/9/24/medline KW - Blood glucose KW - Diabetes mellitus KW - Hearing impairment KW - Noise KW - Workers SP - e11 EP - e11 JF - Annals of occupational and environmental medicine JO - Ann Occup Environ Med VL - 31 N2 - Background: Recently, several studies have assessed the association between diabetes and hearing impairment. However, the effect of diabetes on hearing impairment is not well known in diabetic patients exposed to noise, a typical cause of hearing impairment. The aim of this study is to longitudinally analyze the effect of diabetes on hearing impairment in workers exposed to similar noise levels from 2013 to 2017 who had experienced little change in their working conditions. Methods: The study subjects included 2,087 male workers exposed to noise in a single company and who underwent health examinations at the same hospital in Ulsan city in 2013 and 2017. Hearing impairment was defined that a pure-tone average of pure-tone audiometry (PTA) thresholds at 1,000, 2,000, 3,000, and 4,000 Hz was 25 dB and over in both ears. Statistical analyses were conducted using χ2 tests, ANOVA, and Cox proportional hazard models. We analyzed covariates that might affect hearing impairment, including age; working period; levels of total cholesterol, triglyceride, and serum creatinine; smoking and alcohol history; and noise level. Results: The average PTA thresholds and their average changes between 2013 and 2017 were significant in the diabetes mellitus (DM) group than those in the normal and impaired fasting glucose group. Among the subjects with the same status of fasting glucose group in 2013 and 2017, the adjusted hazard ratios for incident hearing impairment among those in the DM group compared to normal group were 3.35 (95% confidence interval [CI], 1.54-7.29) in the left ear and 5.66 (95% CI, 2.01-15.98) in the right ear. Conclusions: This study suggested that the risk of hearing impairment in the DM group was significantly higher than that in the normal group in both ears, even when exposed to similar noise levels. SN - 2052-4374 UR - https://www.unboundmedicine.com/medline/citation/31543972/The_effect_of_diabetes_on_4-year_changes_of_hearing_thresholds_in_male_workers_exposed_to_noise_in_a_single_company:_a_longitudinal_study L2 - https://aoemj.biomedcentral.com/articles/10.35371/aoem.2019.31.e11 DB - PRIME DP - Unbound Medicine ER -