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Jiho Lee 8 Articles
The effect of diabetes on 4-year changes of hearing thresholds in male workers exposed to noise in a single company: a longitudinal study
Dae Yun Kim, A Ram Kim, Joo Hyun Sung, Choong Ryeol Lee, Jiho Lee
Ann Occup Environ Med 2019;31:e11.   Published online June 28, 2019
DOI: https://doi.org/10.35371/aoem.2019.31.e11
AbstractAbstract PDFPubReaderePub
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.


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Perceptions regarding utilization of meteorological information in healthcare in Korea: a qualitative study
Minsu Ock, Eun Young Choi, Inbo Oh, Seok Hyeon Yun, Yoo-Keun Kim, Hyunsu Kim, Min-Woo Jo, Jiho Lee
Ann Occup Environ Med 2018;30:8.   Published online February 1, 2018
DOI: https://doi.org/10.1186/s40557-018-0214-3
AbstractAbstract PDFPubReaderePub
Background

Health forecasting has been used in an attempt to provide timely and tailored meteorological information to patients and healthcare providers so that they might take appropriate actions to mitigate health risks and manage healthcare-related needs. This study examined the in-depth perceptions of healthcare providers and the general public regarding the utilization of meteorological information in the healthcare system in Korea.

Methods

The COREQ (Consolidated Criteria for Reporting Qualitative Research) checklist was applied to this study. We conducted three focus group discussions in accordance with semi-structured guidelines developed to deal with various aspects of the utilization of meteorological information in healthcare settings. The verbatim transcriptions and field notes were analyzed according to content analysis.

Results

Six physicians, four nurses, three emergency medical technicians, and seven members of the general public participated in the focus group discussions. There were some individual discrepancies among most participants regarding the health effects of climate change. Although several physician participants felt that meteorological information utilization is not a prime concern during patient care, most of the general public participants believed that it should be used in the patient care process. The provision of meteorological information to patients undergoing care is expected to not only improve the effective management of climate-sensitive diseases, but also boost rapport between healthcare providers and patients.

Conclusions

More attempts should be made to provide meteorological information to groups vulnerable to climate change, and the effects of this information should be evaluated in terms of effectiveness and inequality. The findings of this study will be helpful in countries and institutions trying to introduce health forecasting services.

Electronic supplementary material

The online version of this article (10.1186/s40557-018-0214-3) contains supplementary material, which is available to authorized users.


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  • Factors Influencing Nursing Graduate Students’ Perception and Behavior Related to Climate Change and Health: A Secondary Data Analysis
    Min Kyung Park, Seoyoung Baek, Da Woon Jeong, Gwang Suk Kim
    Korean Journal of Adult Nursing.2023; 35(1): 71.     CrossRef
  • Correction to: Perceptions regarding utilization of meteorological information in healthcare in Korea: a qualitative study
    Minsu Ock, Eun Young Choi, Inbo Oh, Seok Hyeon Yun, Yoo-Keun Kim, Hyunsu Kim, Min-Woo Jo, Jiho Lee
    Annals of Occupational and Environmental Medicine.2018;[Epub]     CrossRef
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Correction to: Perceptions regarding utilization of meteorological information in healthcare in Korea: a qualitative study
Minsu Ock, Eun Young Choi, Inbo Oh, Seok Hyeon Yun, Yoo-Keun Kim, Hyunsu Kim, Min-Woo Jo, Jiho Lee
Ann Occup Environ Med 2018;30:30.   Published online May 3, 2018
DOI: https://doi.org/10.1186/s40557-018-0234-z
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Effect of shift work on hypertension: cross sectional study
Jeong Han Yeom, Chang Sun Sim, Jiho Lee, Seok Hyeon Yun, Sang Jin Park, Cheol-In Yoo, Joo Hyun Sung
Ann Occup Environ Med 2017;29:11.   Published online April 11, 2017
DOI: https://doi.org/10.1186/s40557-017-0166-z
AbstractAbstract PDFPubReaderePub
Background

The need of efficient resource management and full-time accessibility to resources has increased with the development of industry, resulting in the increase of shift workers. Previous researches of past decades show that there are various health effects on shift workers. However, the definition and the form of shift work have varied from each research and occupational harmful factors except for shift work have not been excluded completely in previous researches. Therefore, in this research, we tried to find out the effect of shift work focusing on the hypertension. To complement previously mentioned weakness of other researches, we performed our research on participants to whom we could minimize other risk factors excluding shift work.

Methods

This research examined 1,953 petrochemical plant male workers (shift work 1,075, day worker 878) who did medical checkup from 1st Jan. 2014 to 31th Dec. 2014 in a general hospital located in Ulsan, based on their medical records and questionnaires. With the questionnaire, we found out their basic information including age, social status, occupational history, and we took their physical measurements.

Results

Compared to day workers, shift workers’ odds ratio of developing hypertension was 1.31 (95% CI 0.98–1.75). After adjusting confounding variables, adjusted odds ratio for entire subjects was 1.51 (95% CI 1.11–2.06). Also, for subjects who were in continuous service for over 20 years, odds ratio was 1.51 (95% CI 1.08–2.11).

Conclusions

Shift workers had a higher chance of hypertension than day workers do. Particularly, the longer the workers work continuously, the risk of hypertension getting higher.


Citations

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    SLEEP.2024;[Epub]     CrossRef
  • Association of shift work with hypercholesterolemia among nurses: A cross‐sectional and descriptive-analytical study
    Farhad Solymanzadeh, Dariush Rokhafroz, Marziyeh Asadizaker, Maryam Dastoorpoor
    Journal of Human Behavior in the Social Environment.2024; 34(5): 673.     CrossRef
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    Gabriela da Silva Machado, Luiz Antônio Alves de Menezes-Júnior, Raimundo Marques do Nascimento Neto, Sílvia Nascimento de Freitas, Fernando Luiz Pereira de Oliveira, Fausto Aloísio Pedrosa Pimenta, George Luiz Lins Machado-Coelho, Silvana Mara Luz Turbin
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    Occupational Medicine.2022; 72(7): 486.     CrossRef
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    Lisa Stieler, Bettina Hunger, Reingard Seibt
    Journal of Psychophysiology.2022; 36(2): 75.     CrossRef
  • Influence of shift work on cardiovascular disease risk in Southern African long-distance truck drivers: a cross-sectional study
    Melvin Draaijer, Karine Scheuermaier, Samanta Tresha Lalla-Edward, Alex Emilio Fischer, Diederick E Grobbee, Francois Venter, Alinda Vos
    BMJ Open.2022; 12(4): e050645.     CrossRef
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    Ye-eun Jeon, Min Ji Kim, Insung Chung, Jea Chul Ha
    Annals of Occupational and Environmental Medicine.2022;[Epub]     CrossRef
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    Nour Makarem, Carmela Alcántara, Natasha Williams, Natalie A. Bello, Marwah Abdalla
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    Current Opinion in Pharmacology.2021; 57: 28.     CrossRef
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    Chronobiology International.2020; 37(12): 1754.     CrossRef
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    Current Hypertension Reports.2020;[Epub]     CrossRef
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    Chronobiology International.2020; 37(9-10): 1365.     CrossRef
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  • Time for Novel Strategies to Mitigate Cardiometabolic Risk in Shift Workers
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  • Diese Berufe triggern eine Hypertonie
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  • The Effect of Special Medical Examination for Night Shift Workers and Follow-Up Management Against Hypertension
    Won Seon Choi, Ji-Won Lee, Jae Yong Lee, Kyeong Yeon Kim, Jun-Pyo Myong, Won-Chul Lee
    International Journal of Environmental Research and Public Health.2019; 16(5): 719.     CrossRef
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The responses of subjective feeling, task performance ability, cortisol and HRV for the various types of floor impact sound: a pilot study
Seok Hyeon Yun, Sang Jin Park, Chang Sun Sim, Joo Hyun Sung, Ahra Kim, Jang Myeong Lee, Sang Hyun Lee, Jiho Lee
Ann Occup Environ Med 2017;29:13.   Published online May 15, 2017
DOI: https://doi.org/10.1186/s40557-017-0168-x
AbstractAbstract PDFPubReaderePub
Background

Recently, noise coming from the neighborhood via floor wall has become a great social problem. The noise between the floors can be a cause of physical and psychological problems, and the different types of floor impact sound (FIS) may have the different effects on the human’s body and mind. The purpose of this study is to assess the responses of subjective feeling, task performance ability, cortisol and HRV for the various types of floor impact.

Methods

Ten men and 5 women were enrolled in our study, and the English listening test was performed under the twelve different types of FIS, which were made by the combinations of bang machine (B), tapping machine (T), impact ball (I) and sound-proof mattress (M). The 15 subjects were exposed to each FIS for about 3 min, and the subjective annoyance, performance ability (English listening test), cortisol level of urine/saliva and heart rate variability (HRV) were examined. The sound pressure level (SPL) and frequency of FIS were analyzed. Repeated-measures ANOVA, paired t-test, Wilcoxon signed rank test were performed for data analysis.

Results

The SPL of tapping machine (T) was reduced with the soundproof mattress (M) by 3.9–7.3 dBA. Impact ball (I) was higher than other FIS in low frequency (31.5–125 Hz) by 10 dBA, and tapping machine (T) was higher than other FIS in high frequency (2–4 k Hz) by 10 dBA. The subjective annoyance is highest in the combination of bang machine and tapping machine (BT), and next in the tapping machine (T). The English listening score was also lowest in the BT, and next in T. The difference of salivary cortisol levels between various types of FIS was significant (p = 0.003). The change of HRV parameters by the change of FIS types was significant in some parameters, which were total power (TP) (p = 0.004), low frequency (LF) (p = 0.002) and high frequency (HF) (p = 0.011).

Conclusions

These results suggest that the human’s subjective and objective responses were different according to FIS types and those combinations.


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  • Quantifying the Effect of Noise on Cognitive Processes: A Review of Psychophysiological Correlates of Workload
    Jan Grenzebach, Erik Romanus
    Noise and Health.2022; 24(115): 199.     CrossRef
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The association between cadmium and lead exposure and blood pressure among workers of a smelting industry: a cross-sectional study
Hyun Chan An, Joo Hyun Sung, Jiho Lee, Chang Sun Sim, Sang Hoon Kim, Yangho Kim
Ann Occup Environ Med 2017;29:47.   Published online October 4, 2017
DOI: https://doi.org/10.1186/s40557-017-0202-z
AbstractAbstract PDFPubReaderePub
Background

Lead and cadmium are harmful heavy metals that are used for a variety of occupational purposes. Considering their potentially hazardous effects on health, studies on the association between exposure to these two heavy metals and health disorders have been actively conducted. This study aimed to determine the association between blood lead and cadmium levels and blood pressure in workers exposed to lead and cadmium in a smelter.

Methods

Nine hundred and sixty-three male workers who worked in a smelter, and underwent medical examinations at the Ulsan University Hospital between January 1 and December 31, 2014, were selected as participants. Among them, 310 subjects whose data on height, weight, blood pressure, fasting blood glucose, lipid profile, and blood lead and cadmium levels were available and who answered the questionnaire were selected as the final participants. We investigated the drinking habit, smoking status, exercise adequacy, and family history of hypertension of these workers using formal questionnaires. A statistical analysis was conducted using Student’s t-test, analysis of variance, and linear or logistic regression.

Results

The association between blood lead and cadmium levels and blood pressure was analyzed through statistical adjustment of the risk factors of hypertension. Results showed an association between blood cadmium level and blood pressure elevation. However, blood lead level was found to be not correlated with blood pressure elevation.

Conclusions

This study shows the association between blood cadmium level and systolic blood pressure (SBP) and diastolic blood pressure (DBP) elevation.

Trial registration

IRB No. 2017–03-037. Retrospectively Registered 30 March 2017.


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Comparisons of hearing threshold changes in male workers with unilateral conductive hearing loss exposed to workplace noise: a retrospective cohort study for 8 years
Sang Jin Park, Joo Hyun Sung, Chang Sun Sim, Seok Hyeon Yun, Jeong Han Yeom, Joong-Keun Kwon, Jiho Lee
Ann Occup Environ Med 2016;28:51.   Published online September 22, 2016
DOI: https://doi.org/10.1186/s40557-016-0132-1
AbstractAbstract PDFPubReaderePub
Background

The purpose of this study was to investigate hearing threshold changes of workers with unilateral conductive hearing loss who were exposed to workplace noise for 8-years.

Methods

Among 1819 workers at a shipyard in Ulsan, 78 subjects with an air-bone gap ≥10 dBHL in unilateral ears were selected. Factors that could affect hearing were acquired from questionnaires, physical examinations, and biochemistry examinations. Paired t-test was conducted to compare the hearing threshold changes over time between conductive hearing loss (CHL) ear and sensorineural hearing loss (SNHL) ear.

Results

The study included male subjects aged 48.7 ± 2.9, having worked for 29.8 ± 2.7 years. Hearing thresholds increased significantly in CHL ears and SNHL ears at all frequencies (0.5–6 kHz) during follow-up period (p < 0.05). The threshold change at 4 kHz was 3.2 dBHL higher in SNHL ears which was statistically significant (p < 0.05). When workers were exposed to noise levels of 85 dBA and above, threshold change at 4 kHz was 5.6 dBHL higher in SNHL ears which was statistically significant (p < 0.05). Among workers aged below 50, the threshold change values were lower in low-frequency (0.5–2 kHz) in SNHL ears, with a small range of changes, whereas in high-frequency (3–6 kHz), the range of changes was greater SNHL ears (p < 0.05). Among workers aged 50 and above, SNHL ears showed a wider range of changes in both high- and low-frequency areas (p < 0.05).

Conclusions

At high-frequencies, particularly at 4 kHz, the range of hearing threshold changes was lower in ears with conductive hearing loss than in contralateral ears. This is suggested as a protective effect against noise exposure.


Citations

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  • Prevalence of Pre-Existing Hearing Loss Among Patients With Drug-Resistant Tuberculosis in South Africa
    Hyejeong Hong, David W. Dowdy, Kelly E. Dooley, Howard W. Francis, Chakra Budhathoki, Hae-Ra Han, Jason E. Farley
    American Journal of Audiology.2020; 29(2): 199.     CrossRef
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Relationship of cigarette smoking and hearing loss in workers exposed to occupational noise
Joo Hyun Sung, Chang Sun Sim, Choong-Ryeol Lee, Cheol-In Yoo, Hun Lee, Yangho Kim, Jiho Lee
Ann Occup Environ Med 2013;25:8-8.   Published online July 3, 2013
DOI: https://doi.org/10.1186/2052-4374-25-8
AbstractAbstract PDFPubReaderePub
Objectives

To investigate the effects of smoking on hearing loss among workers exposed to occupational noise.

Methods

From the results of a special workers health examination performed in 2011, we enrolled 8,543 subjects exposed to occupational noise and reviewed the findings. Using self-reported questionnaires and health examination results, we collected data on age, smoking status, disease status, height, weight, and biochemistry and pure tone audiometry findings. We divided the workers into 3 groups according to smoking status (non-smoker, ex-smoker, current smoker). Current smokers (n = 3,593) were divided into 4 groups according to smoking amount (0.05–9.9, 10–19.9, 20–29.9, ≥30 pack-years). We analyzed the data to compare hearing thresholds between smoking statuses using analysis of covariance (ANCOVA) after controlling for confounder effects.

Results

According to ANCOVA, the hearing thresholds of current smokers at 2 k, 3 k, and 4 kHz were significantly higher than that of the other groups. Multiple logistic regression for smoking status (reference: non-smokers) showed that the adjusted odds ratios of current smokers were 1.291 (95% confidence interval [CI]: 1.055–1.580), 1.180 (95% CI: 1.007–1.383), 1.295 (95% CI: 1.125–1.491), and 1.321 (95% CI: 1.157–1.507) at 1 k, 2 k, 3 k, and 4 kHz, respectively. Based on smoking amount, the adjusted odds ratios were 1.562 (95% CI: 1.013–2.408) and 1.643 (95% CI: 1.023–2.640) for the 10–19.9 and ≥30 pack-years group, respectively, at 1 kHz (reference: 0.05–9.9 pack-years). At 2 kHz, the adjusted odds ratios were increased statistically significantly with smoking amount for all groups. At all frequencies tested, the hearing thresholds of noise-exposed workers were significantly influenced by current smoking, in particular, the increase of hearing loss at low frequencies according to smoking amount was more prevalent.

Conclusions

Current smoking significantly influenced hearing loss at all frequencies in workers exposed to occupational noise, and heavier smoking influenced low-frequency hearing loss more greatly. There was a dose–response relationship between smoking amount and low-frequency hearing thresholds; however, this was not observed for high-frequency hearing thresholds. Therefore, well-designed prospective studies are needed to clarify the effects of smoking on the degree of hearing loss.


Citations

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  • Tobacco Smoking as a Risk Factor of Hearing Impairment in Workers Exposed to Occupational Noise: A Literature Review
    Vladimir F. Spirin, Svetlana V. Raikova, Nataliia E. Komleva, Andrey M. Starshov
    ЗДОРОВЬЕ НАСЕЛЕНИЯ И СРЕДА ОБИТАНИЯ - ЗНиСО / PUBLIC HEALTH AND LIFE ENVIRONMENT.2024; : 49.     CrossRef
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    Marwin Li, Natalie M. Perlov, Jena Patel, Dev Amin, Ayan Kumar, Zachary D. Urdang, Thomas O. Willcox, Rebecca C. Chiffer
    Otology & Neurotology.2023;[Epub]     CrossRef
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    Daniel Raj Rasasoran, Azman Atil, Mohammad Saffree Jeffree, Sahipudin Saupin, Khamisah Awang Lukman
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