Annals of Occupational and Environmental Medicine

Jung-Woo Park

3 Articles

The association between long working hours and hearing impairment in noise unexposed workers: data from the 5th Korea National Health and Nutrition Examination Survey (KNHANES 2010–2012): Jung-Woo Park, Jin-Soo Park, Seyoung Kim, Minkyu Park, Hyunrim Choi, Sinye Lim; Ann Occup Environ Med 2016;28:55. Published online October 6, 2016; DOI: https://doi.org/10.1186/s40557-016-0140-1

Background

This study is aimed at finding out the relationship between long working hours, one of major job stress elements, and hearing impairment in unexposed workers to occupational and environmental noise.

Methods

This study was performed on 1628 regular, full-time wage workers between the age of 25-64 who indicated in the survey of having no experience of exposure to noise, normal otoscopic findings, and not suffering from diabetes based on the data from the fifth Korea National Health and Nutrition Examination Survey (KNHANES 2010–2012). The average working hours per week was categorized into 40 h and lower group, more than 40 to 48 h group, more than 48 to 60 h group, and more than 60 h group. The groups were defined as suffering from low or high frequencies hearing impairment if the average hearing threshold for 0.5, 1, 2 kHz or 3, 4, 6 kHz in both ears exceeds 25 dB based on the pure tone audiometry. The association between average weekly working hours and hearing impairment was analyzed using logistic regression after gender stratification.

Results

The prevalences of low and high frequencies hearing impairment in male workers were 4.3 and 28.6 %, respectively, which were much higher than female’s prevalence of 2.7 and 11.1 %. For male workers, no significant association was found between average weekly working hours and low and high frequencies hearing impairment. For female workers, odds ratios (OR) of low and high frequencies hearing impairment were 4.22 (95 % confidence interval (CI) 1.09–16.27) and 4.49 (95 % CI 1.73–11.67), respectively, after controlling for several related factors, such as, age, Body Mass Index (BMI), socio-economic status, health-related behavioral, and occupational characteristics variables, in the final model in the group working more than 60 h compared to the group working 40 h and lower. In addition, a dose-response relationship was observed that ORs of low and high frequencies hearing impairment were increased according to increasing average weekly working hours.

Conclusions

The association between long working hours and hearing impairment in both low and high frequencies was significant in Korean female workers with a dose-response relationship. Therefore, the law to change the culture of long working hours should be enacted in order to protect the workers’ health and improve the quality of life in Korean workers.

Citations

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Evaluation of the effect of Nigella sativa oil on the outcome of missed abortion in women: A randomized double‐blind clinical trial
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Characteristics of Auditory Brainstem Response in Night-shift Health Workers
Samir Kumar Singh, Poonam Jyoti Rana, Anita Gupta, Dibyodyuti Samaddar, Hanjabam Barun Sharma
Annals of Neurosciences.2024;[Epub] CrossRef
Hearing Impairment and Allostatic Load in Older Adults
Eric Y. Du, Kening Jiang, Michelle C. Carlson, Nicholas S. Reed, Jennifer A. Deal
JAMA Otolaryngology–Head & Neck Surgery.2023; 149(7): 597. CrossRef
Association Between Long Working Hours and Chronic Kidney Disease According to Diabetic Status
Ki Duk Kim, Suk-Yong Jang
Journal of Occupational & Environmental Medicine.2022; 64(3): 190. CrossRef
Long working hours are associated with a higher risk of non-alcoholic fatty liver disease: A large population-based Korean cohort study
Yesung Lee, Eunchan Mun, Soyoung Park, Woncheol Lee, Jee-Fu Huang
PLOS ONE.2021; 16(7): e0255118. CrossRef
Can listening-related fatigue influence well-being? Examining associations between hearing loss, fatigue, activity levels and well-being
Jack A. Holman, Benjamin W. Y. Hornsby, Fred H. Bess, Graham Naylor
International Journal of Audiology.2021; 60(sup2): 47. CrossRef
Occupational Differences in C-Reactive Protein Among Working-Age Adults in South Korea
Yongjoo Kim, Masayoshi Zaitsu, Kanami Tsuno, Xiaoyu Li, Sunmin Lee, Soong-nang Jang, Ichiro Kawachi
Journal of Occupational & Environmental Medicine.2020; 62(3): 194. CrossRef
Audiometric notch for the prediction of early occupational hearing loss and its association with the interleukin-1beta genotype
Nagat M. Amer, Mona M. Taha, Khadiga S. Ibrahim, Heba M. Abdallah, Eman M. El Tahlawy
Journal of Taibah University Medical Sciences.2019; 14(3): 289. CrossRef
Long working hours are associated with unmet dental needs in south Korean male adults who have experienced dental pain
Yitak Kim, Sangwon Lee, Juyeong Kim, Eun-Cheol Park, Sung-In Jang
BMC Oral Health.2019;[Epub] CrossRef
Severe hearing impairment and risk of depression: A national cohort study
So Young Kim, Hyung-Jong Kim, Eun-Kyu Park, Jiwon Joe, Songyong Sim, Hyo Geun Choi, Manuel S. Malmierca
PLOS ONE.2017; 12(6): e0179973. CrossRef

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The relationship between night work and involuntary weight change: data from the fifth Korea National Health and Nutrition Examination Survey (KNHANES 2010–2012): Jongho Kwon, Jung-Woo Park, Jin-Soo Park, Seyoung Kim, Hyunrim Choi, Sinye Lim; Ann Occup Environ Med 2016;28:4. Published online January 29, 2016; DOI: https://doi.org/10.1186/s40557-016-0088-1

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Background

Previous studies on the association between shift or night work and weight change have been focused on finding the risk of weight gain caused by shift or night work. In this study, we aimed to reveal the risk of weight gain and weight loss associated with night work by using a nationwide representative data.

Methods

This study was performed on 1605 full-time wage workers between the age of 20 and 69 based on the fifth Korea National Health and Nutrition Examination Survey (KNHANES 2010–2012). The association between night work and involuntary weight change in the previous year was divided into the categories of weight gain and weight loss and studied with modifications in socio-demographic variables, health behavior-related variables, and occupational characteristic variables.

Results

The participants working in night work accounted for 10.6 % of total study participants (male; 11.9 %, female 7.4 %). Workers who worked more than 48 hours per week on average accounted for 41.6 % of the total study participants (male; 46.3 %, female 29.1 %).

Odds ratio (OR) of weight loss associated with night work in male workers was 0.34 (95 % confidence interval (CI) 0.16–0.76) after controlling for several related factors. OR of weight loss associated with night work in female workers with long working hours was 1.95 (95 % CI 0.47–80.86) and that of weight gain was 2.83 (95 % CI 0.12–69.83) after adjusting associated factors.

Conclusions

In this cross-sectional study with national representative sample, night work may lower the risk of weight loss in male workers and induce weight change (weight loss or weight gain) in female workers with long working hours. Therefore, future studies with cohort study design for night workers are needed to reveal the mechanisms and health effects of weight change associated with night work and establish proper management solutions with health and labor policies for Korean night workers.

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Effect of work-related factors on the prevalence of peptic ulcer disease among Korean workers: a nationwide population-based study
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Spontaneous and repeat spontaneous abortion risk in relation to occupational characteristics among working Korean women: a cross-sectional analysis of nationally representative data from Korea
Wanhyung Lee, Sung Won Jung, Young-Mee Lim, Kyung-Jae Lee, June-Hee Lee
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Weight gain and body mass index following change from daytime to night shift – a panel study with nursing professionals
Kali Siqueria, Rosane Griep, Lúcia Rotenberg, Aline Silva-Costa, Maria de Jesus Mendes da Fonseca
Chronobiology International.2016; 33(6): 776. CrossRef
Effects of shift work on abdominal obesity among 20–39-year-old female nurses: a 5-year retrospective longitudinal study
Gyeong-Jin Lee, Kunhyung Kim, Se-yeong Kim, Jeong-Ho Kim, Chunhui Suh, Byung-Chul Son, Chae-Kwan Lee, Junghye Choi
Annals of Occupational and Environmental Medicine.2016;[Epub] CrossRef

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The Association between Long Working Hours and Self-Rated Health: Jun-Taek Song, Goeun Lee, Jongho Kwon, Jung-Woo Park, Hyunrim Choi, Sinye Lim; Ann Occup Environ Med 2014;26:2-2. Published online January 20, 2014; DOI: https://doi.org/10.1186/2052-4374-26-2

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Objectives

This study was conducted to determine the number of hours worked per week by full-time wage workers by using the data of the Korean Labor and Income Panel Study (KLIPS), which represents the domestic urban area household, and to determine the association between weekly working hours and the level of self-rated health.

Methods

We used data from the 11th KLIPS conducted in 2008. The subjects of this study were 3,699 full-time wage workers between the ages of 25 and 64 years. The association between weekly working hours and self-rated health was analyzed considering socio-demographic characteristics, work environment, and health-related behaviors.

Results

Among the workers, 29.7% worked less than 40 hours per week; 39.7%, more than 40 to 52 hours; 19.7%, more than 52 to 60 hours; and 10.9%, more than 60 hours per week. After controlling for socio-demographic variables, work environment-related variables, and health-related behavior variables, the odds ratio (OR) for poor self-rated health for the group working more than 40 hours and up to 52 hours was calculated to be 1.06 (95% confidence interval (CI), 0.89-1.27) when the group working less than 40 hours per week was considered the reference. The OR for the group working more than 60 hours was 1.42 (95% CI, 1.10-1.83) and that for the group working more than 52 hours and up to 60 hours was 1.07 (95% CI, 0.86-1.33). After stratification by gender and tenure, the OR of the female workers group and that of the group with a tenure of more than 1 year were found to be significantly higher than those of the other groups.

Conclusions

This study showed that workers working more than 60 hours per week have a significantly higher risk of poor self-rated health than workers working less than 40 hours per week. This effect was more obvious for the female workers group and the group with a tenure of more than 1 year. In the future, longitudinal studies may be needed to determine the association between long working hours and various health effects in Korean workers.

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