Annals of Occupational and Environmental Medicine

Jai Young Kim

6 Articles

The Effects of Job Stress on the Autonomic Nerve Activity of Workers in Manufacturing Industry: Ki Jung Yoon, Mi Na Ha, Jai Young Kim, Sang Yun Lee, Hyoung June Im, Ae Sun Shin, Seung Sik Hwang, Jeong Soo Kim, Dae Hee Kang, Soo Hun Cho; Korean Journal of Occupational and Environmental Medicine 2002;14(3):280-287. Published online September 30, 2002; DOI: https://doi.org/10.35371/kjoem.2002.14.3.280

Abstract PDF: OBJECTIVE: A cross-sectional study was conducted to evaluate the relationships between autonomic nerve activity (i.e., heart rate variability and urinary catecholamines) and job stress.
METHODS
The study was conducted on 134 workers from a company producing consumer goods (i.e., diaper, paper towel) located in Cheonan, Korea. Job stress was assessed by Karasek's Job Content Questionnaire (JCQ). Autonomic function was assessed by heart rate variability (HRV) and urinary catecholamines (epinephrine, norepinephrine, and dopamine). Urine samplings, and measurings of HRV, were repeated three times for each shift. Information on demographic characteristics, previous job histories, past medical history, smoking and drinking were also collected.
RESULTS
No statistically significant differences were observed in any HRV and urinary catecholamines among the four groups, which were categorized by the Job Strain Model. When data were stratified by work duration, low field HRV was borderline significantly higher in the high strain group in individuals with a shorter work duration (<48.5 months, N=28, p-value of 0.92 by analysis of variance).
CONCLUSIONS
Neither HRV nor urinary catecholamines are significantly associated with job stress, as assessed by the Karasek's JCQ. However, HRV seems to be a potential physiological indicator of job stress only in the workers with a shorter work duration.

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Job instability of Labor Market and Preplacement Health Examination: the Case of Hearing Loss: Sang Baek Koh, Kyoo Sang Kim, Sei Jin Chang, Bong Suk Cha, Jong Ku Park, Dong Mug Kang, Jai Young Kim, Soo Keun Kim, Hong Ryul Choi; Korean Journal of Occupational and Environmental Medicine 2002;14(1):57-68. Published online March 31, 2002; DOI: https://doi.org/10.35371/kjoem.2002.14.1.57

Abstract PDF: OBJECTIVES
This study examines the problem of the preplacement health examination in terms of hearing loss case, where workers have been experiencing job instability in the labor market.
METHODS
In order to measure the 2-year job retention rate of employees in 79 shipbuilding subcontracted companies in Kyongnam province, we utilized the same methods as those used by Neumark et al(1999), and Bernhardt et al(1999). We surveyed 79 heath and safety personnel from the companies with a questionnaire to evaluate the present status of the preplacement health examination. We reviewed the preplacement health certificates(result of audiometric hearing thresholds) of 1,818 recruits issued by Daewoo hospital from January 1 to June 30, 2001.
RESULTS
The job retention rate was 40.3 %(male 38.53 %, female 52.01 %). Of the 79 health and safety personnel of companies, 44(55.7 %) perceived the preplacement health examination as a tool for the selection of recruits, 3(3.8 %) as a procedure for job fitting and 31(39.2 %) as both. Most of them were against the acceptance of recruits with hearing loss, spinal disease and hepatitis. Among the 1,818 workers who underwent the preplacement health examination, 530(29.1 %) were examined after employment, but 1,096(60.3 %) were examined before employment. The number with previous job experience was 1,591(87.5 %). In the audiometric hearing threshold results, the prevalence of hearing loss was positively correlated with age. There was a significant difference in the prevalence of hearing loss depending on previous job and number of quitting at 4,000 Hz.
CONCLUSIONS
The comparison of 2-year job retention rates before and after the Korean economic crisis of 1997 suggests that job stability has been aggravated especially for cohorts of long tenure, irregular job, and old age. This evidence shows that previous job and age play a role in determining worker employment based on perceived results from the preplacement health examination. This result suggests that a pre-employment health examination be substituted for the preplacement health examination based on the essential job functions and reasonable accommodation. Because it has little relevance in a wide range of employment and minor health problems, the results of this examination should not debar applicants from employment.

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The Similar Exposure Group and Exposure Variation in Ship-Building Painters: Focused on Xylene Exposure: Sang Baek Koh, Young Man Roh, Hyeon Woo Yim, Yong Chul Shin, Soo Keun Kim, Hong Ryul Choi, Jai Young Kim, Soung Hoon Chang; Korean Journal of Occupational and Environmental Medicine 2001;13(4):413-422. Published online December 31, 2001; DOI: https://doi.org/10.35371/kjoem.2001.13.4.413

Abstract PDF

OBJECTIVES
This study was conducted to assess the concentration of xylene exposure and exposure variability of a similar exposure group(SEG) in accordance with job title and confined space.
METHOD
The study subjects included 28 workers working in the painting process in the ship-building industry. Measurement of subjects were repeated three times. Within and between-worker exposure variance components were estimated from log-transformed exposure concentrations employing a one-way nested random effects analysis of variance model. A uniformly exposed group was defined as one where the between-worker variance(sigmaB2) was less than or equal to 0.031 or bwR95 RESULT
The results indicated that, contrary to popular belief, similar exposed groups based on job title were heterogeneous. The between-worker variance(sigmaB 2) is large(>or=0.031) and the ratios of the 97.5th and 2.5th percentile workers of the log normally distributed exposures of each group of workers was more than 2. However dividing job title into confined space(in-block, out-block, in/out-block) decreased the between-worker exposure variability.
CONCLUSION
This study focused on the quantitative aspects of exposure in painters in the ship-building industry. We cannot accept the assumption that SEG are uniformly exposed, as a major component of variation in exposure relates to differences in tasks or other factors. Therefore, the observational schemes can be improved by investigating jobspecific task and practice.

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Overview of occupational cancer in painters in Korea
Jun-Pyo Myong, Younmo Cho, Min Choi, Hyoung-Ryoul Kim
Annals of Occupational and Environmental Medicine.2018;[Epub] CrossRef
The Work Environment and Wearing Conditions of Industrial Protective Clothing in Shipbuilding Workshops
Hyun-Sook Bae, Min-Young Kim
Journal of the Korean Society of Clothing and Textiles.2012; 36(5): 512. CrossRef

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Influence of Shiftwork Duration on Blood Pressure and Heart Rate Variability in Short Rotating 8-hour Shiftworkers: Mi Na Ha, Jai Young Kim, Jung Sun Park, Ho Keun Chung; Korean Journal of Occupational and Environmental Medicine 2001;13(2):180-189. Published online June 30, 2001; DOI: https://doi.org/10.35371/kjoem.2001.13.2.180

Abstract PDF

OBJECTIVES
This study was performed to investigate the chronic health effect of shiftwork on cardiovascular system.
METHODS
We checked blood pressure(BP) and heart rate variability(HRV) at every shift on 134 male workers whose shift type was 8-hour and short rotating of 3 days shift interval. As confoundings, job stress was measured by Karasek's JCQ 49 items questionnaire and circardian type was assessed by morningness-eveningness questionnaire. Smoking and alcohol drinking habit, marital status and past medical history were also acquired. We used the method of repeated measured data analysis with mixed model to show the association between shiftwork duration and BP or HRV.
RESULTS
Average age of workers was 29 years olds(range 25~44). Among them, 77.9 % were current smokers, 50 % were the passive type of job strain in Karasek's model. Mean shiftwork duration was 5.21 years(range 5.4 months~10 years). In circadian type, no one was definitely morning type or definitely evening type. In multivariate analyses adjusted by age, job strain, shift, circadian rhythm and smoking, blood pressure were showed significantly increasing trends according to shiftwork duration in both systolic and diastolic(p<0.05). Heart rate variability were also showed significantly decreasing trends according to shiftwork duration in both parasympathetic and sympathetic functions(p<0.05).
CONCLUSIONS
The results of this studs suggests the chronic negative health effect of shiftwork on cardiovascular system.

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Association between serum ferritin and hypertension according to the working type in Korean men: the fifth Korean National Health and nutrition examination survey 2010–2012
Dong-Hoon Lee, Seong-Kyu Kang, Won-Jun Choi, Kyeong Min Kwak, Dukyun Kang, Sang Ha Lee, Jun-Hyung Lee
Annals of Occupational and Environmental Medicine.2018;[Epub] CrossRef
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
Annals of Occupational and Environmental Medicine.2017;[Epub] CrossRef
The Immediate Effects of Foot-bath at Diverse Temperatures on the Stress of Students in the Department of Physical Therapy who Experience Clinical Practice
Han-Ki Shin, Jong-Ho Kang
Journal of the Korean Society of Physical Medicine.2016; 11(1): 107. CrossRef
Effect of working patterns on eating habits in manufacturing workers of Gwangju area
Ji-Suk Yim, Young-Ran Heo, Eun Jeong, Jae-Joon Lee
Journal of Nutrition and Health.2016; 49(6): 495. CrossRef
The Effect of the Physical Therapy Treatment Room Environment Using Microwave Diathermy on the Autonomic Nervous System of Human Body
Han-Ki Shin, Tae-Kyu Lee, Je-Yoon Jun, Ju-Seung Kim, Jong-Ho Kang
Journal of the Korean Society of Physical Medicine.2015; 10(1): 37. CrossRef
Occupational Stress of Women Workers in Service Industries depending on Their Working Conditions
Su-Jin Kwak, Hye-Sun Jung
Korean Journal of Occupational Health Nursing.2014; 23(2): 89. CrossRef
The Relationship between Anxiety, Depression and 24-hour Ambulatory Blood Pressure in Hotel Employees
Jun-Ho Bae, Jeong-Kyu SaKong, Sang-Kyu Kim
Journal of agricultural medicine and community health.2011; 36(3): 157. CrossRef

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The Association of Workplace Cumulative Noise Exposure and Blood Pressure: Sang Yun Lee, Jai Young Kim, Hyoung June Im, Ki Jung Yoon, Hong Ryul Choi, Sang Baek Koh, Dae Hee Kang, Soo Hun Cho; Korean Journal of Occupational and Environmental Medicine 2001;13(2):200-208. Published online June 30, 2001; DOI: https://doi.org/10.35371/kjoem.2001.13.2.200

Abstract PDF

OBJECTIVES
The association of workplace cumulative noise exposure and blood pressure was investigated in this study using cross-sectional design.
METHODS
The study population comprised 852 manufacturing male workers of whom occupational health examination data, questionnaire and personnel records were available. Workplace ambient noise monitoring data was used for calculating individual cumulative noise exposure level. Mean of each systolic and diastolic blood pressure of occupational health examination data was used for individual systolic and diastolic blood pressure level. Possible confounding variables including family history of hypertension, smoking habit, alcohol drinking habit were collected by questionnaire. On the basis of job location and duration of work at the location, a cumulative time-weighted average noise level was calculated for each workers. According to this cumulative noise exposure level, each study subject was categorized as low noise exposure group, moderate noise exposure group, high noise exposure group, very high noise exposure group. Among noise exposure groups, mean of systolic and diastolic blood pressure was compared after adjusting possible confounding variables such as age, body mass index, serum cholesterol level, family history of hypertension, smoking history, alcohol drinking habit.
RESULTS
After adjusting possible confounding variables, noise exposure group was significant explanatory variables for both systolic and diastolic blood pressure, and mean of both systolic and diastolic blood pressure of very high exposure group was higher than that of low exposure group.
CONCLUSIONS
These findings suggested that the high cumulative noise exposure might elevate the blood pressure.

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Impact of Indoor Green in Rest Space on Fatigue Recovery Among Manufacturing Workers
ChoHye Youn, LeeBom Chung, Minji Kang, Juyoung Lee
Journal of Environmental Science International.2024; 33(3): 217. CrossRef
The relationship between occupational noise exposure and hypertension using nearest age-matching method in South Korea male workers
Min Gi Kim, Yeon-Soon Ahn, Zhongmin Jin
Cogent Engineering.2021;[Epub] CrossRef
Cohort study for the effect of chronic noise exposure on blood pressure among male workers in Busan, Korea
Ji Ho Lee, Weechang Kang, Seung Rim Yaang, Nari Choy, Choong Ryeol Lee
American Journal of Industrial Medicine.2009; 52(6): 509. CrossRef

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The Health Status Assessment of Subcontracted Workers: Hong Ryul Choi, Sang Baek Koh, Sei Jin Chang, Bong Suk Cha, Hyoung June Im, Sang Yun Lee, Jai Young Kim, Dong Mug Kang, Soo Hun Cho; Korean Journal of Occupational and Environmental Medicine 2001;13(1):18-30. Published online March 31, 2001; DOI: https://doi.org/10.35371/kjoem.2001.13.1.18

Abstract PDF

OBJECTIVES
The strategy for the labor flexibility through subcontracted labor have brought a negative effect on the lives of the workers, such as the increase of the unstable employment. This study was conducted to analyze the relationship between the employment of subcontracted firms and the health status of them, and to find out some problems which have been caused in the process of health evaluation and the characteristics of social exclusion.
METHODS
We reviewed the periodical health examination and preemployment health examination in order to compare health status of the subcontracted workers with those of the parent firm workers. The SF-36 questionnaire was administered to assess the self-perceived health status.
RESULTS
The result shows that compared to the working duration of the parent firm workers, those of the subcontracted workers were shorter, and the job transfer rate was higher. In the periodical health examination, the prevalence of occupational and general disease was higher in the parent firm(10%) than in the subcontracted firms(6%). Preemployment health examination plays an important role in worker's health management. Among 6,260 workers who received preemployment health examination, the prevalence of disease was 37.9%. Mean scores of health status measured by SF-36 were lower in the subcontracted firm than in the parent firm.
CONCLUSIONS
Due to social exclusion of the subcontracted workers from the periodical health examination, there is a possibility that the periodical health examination have the healthy worker effect. These results suggests that the preemployment health examination could be a more appropriate indicator which is able to assess the health status of the subcontracted workers than the periodical health examination.

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Workplace Violence in Workers with Multi-Party Employment Arrangements: Results from the Korean National Representative Survey
Yeogyeong Yoon, Kyunghee Jung-Choi
Safety and Health at Work.2022; 13(1): 93. CrossRef
Participation inequality in the National General Health Examination based on enterprise size
Young Joong Kang, Jong Heun Park, Huisu Eom, Bohwa Choi, Seyoung Lee, Ji-Won Lee, Jun-Pyo Myong
Annals of Occupational and Environmental Medicine.2017;[Epub] CrossRef
Subcontractors and increased risk for work‐related diseases and absenteeism
Kyoung B. Min, Shin G. Park, Jae S. Song, Kwan H. Yi, Tae W. Jang, Jin Y. Min
American Journal of Industrial Medicine.2013; 56(11): 1296. CrossRef
Factors Associated with Cancer Screening Rates of Manufacturing Workers
Su Ho Park, Chang Hee Kim, Eun Kyung Kim
Korean Journal of Occupational Health Nursing.2013; 22(3): 179. CrossRef

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