Annals of Occupational and Environmental Medicine

Jae Yun Jung

2 Articles

Effects of Cardiovascular Risk Factors on Hearing Loss: Jong Do Jeong, Hyunjoo Kim, Jae Yun Jung, Sangchul Roh, Ho Jang Kwon, Eun Jung Kim, Moo Yong Rhee; Korean Journal of Occupational and Environmental Medicine 2009;21(3):225-234. Published online September 30, 2009; DOI: https://doi.org/10.35371/kjoem.2009.21.3.225

Abstract PDF: OBJECTIVE: To investigate the effects of cardiovascular risk factors on hearing loss by vascular damage, such as in atherosclerosis.
METHOD
This study was conducted as a part of a study for the health effects of air-craft noise from 13 July 2005 to 13 January 2006. In this study 810 residents were selected from 13 villages in Pyeongteck City. Participants in this study were stratified by gender. Individuals, who had conductive hearing loss, were excluded form this investigation. Cardiovascular risk factors were divided into medical risk factors (mean arterial pressure (MAP), blood glucose, triglyceride) and behavioral risk factors (smoking, alcohol). The degree of atherosclerosis was determined by aPWV. Pure tone air conduction hearing thresholds were obtained at frequencies of 1000 and 4000 Hz. As for statistic data analysis, multiple linear regression models were used to evaluate the relationship between factors on hearing loss and aortic pulse wave velocity. Structural Equation Modeling was used to analyze the relationship between factors.
RESULTS
According to multiple linear regression models among males, age, aircraft noise, aPWV were associated with hearing loss. In females, age and aircraft noise were associated with hearing loss. Thus cardiovascular risk factors were not directly involved in hearing loss. However, cardiovascular risk factors such as alcohol, MAP in males and MAP, blood glucose in females were statistically significant (p<0.05) on aPWV according to multiple linear regression modeling. According to analysis of structural equation modeling, an indirect relationship was observed between cardiovascular risk factors and hearing loss by atherosclerosis, which was measured by aPWV. In males, medical risk factors were significantly associated with atherosclerosis (beta+/-SE: 0.07+/-0.03, p=0.03). Atherosclerosis was also associated with hearing loss (beta+/-SE: 2.01+/-0.89, p=0.03). In females, medial risk factors was significantly associated with atherosclerosis (beta+/-SE: 0.08+/-0.02, p=0.00), but atherosclerosis was not significantly associated with hearing loss.
CONCLUSION
Although noise exposure is a known major threat to hearing loss, understanding of cardiovascular risk factors associated with hearing loss also take a significant role in preventing hearing loss. Therefore, scrutinization of the etiologic factors for hearing disability may introduce a detailed strategy to abate the prevalence of hearing loss.

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Relationship of Aircraft-noise and the Result of Audiological Evaluation Among Residents Near U.S. Military Airbases in Pyeongtaek City: Jong Do Jeong, Hyunjoo Kim, Jae Yun Jung, Sangchul Roh, Ho Jang Kwon; Korean Journal of Occupational and Environmental Medicine 2009;21(2):154-164. Published online June 30, 2009; DOI: https://doi.org/10.35371/kjoem.2009.21.2.154

Objective: To investigate the relationship between aircraft noise and the results of audiological evaluation on tinnitus and hearing loss among residents near United States military air-bases in Pyeongtaek city.
METHODS
Residents (n=492) exposed to aircraft noise were selected from eight villages near U.S. military air-bases (K-55 and K-6) in Pyeongtaek city. Residents (n=200) from five villages located at least 10 km away from the air-base were selected for the control group. All participants completed a questionnaire on tinnitus and audiological evaluations included pure tone audiometry (PTA) and distortion product otoacoustic emissions (DPOAE). Statistical analyses involved a general linear model and multiple logistic regression stratified by gender and data was adjusted by age, educational level, stress response index and noise type (i.e. military, agricultural and occupational).
RESULTS
The equivalent noise levels (Leq) in the vicinity of the air-field were 73.4~81.5 dB (A). Tinnitus prevalence was 47.3% and odds ratio (OR) was 2.06 (95% confidence interval (CI): 1.09~3.88) among noise-exposed males. Tinnitus prevalence was 50.8% and OR was 1.97(95% CI: 1.17~3.30) among noise-exposed females. Tinnitus handicap scores among exposed group were significantly higher in functional, emotional, and catastrophic subclasses (p<0.001). PTA revealed hearing thresholds among the exposed group of 0.5 and 1 kHz (male right ear), 0.5 and 1 kHz (female left ear) and 0.5, 1, 2, 3, 4 and 6 kHz on female right ear that were significantly higher than those of the unexposed group. No significant difference in DPOAE was observed among noise-exposed males. However, significant differences were evident for noise-exposed females at 3175 and 4007 Hz. ORs of right female ears 3175 and 4007 Hz were 1.73(95% CI: 1.01~2.99) and 1.78(95% CI: 1.01~3.15). ORs of left female ears at 3175 Hz and 4007 Hz were 1.92(95% CI: 1.10~3.36) and 2.71(95% CI: 1.49~4.91) CONCLUSIONS: Aircraft noise may adversely affect hearing function and tinnitus.

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Occupational Hearing Loss in Korea
Kyoo Sang Kim
Journal of Korean Medical Science.2010; 25(Suppl): S62. CrossRef

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