Annals of Occupational and Environmental Medicine

Soo Jin Lee

17 Articles

Association between Job-related Factors and Musculoskeletal Symptoms in University Hospital Healthcare Workers: Yoonbum Choi, Soo Jin Lee, Jae Chul Song, Kyu Jung Bae, Hwanjin Park; Korean Journal of Occupational and Environmental Medicine 2012;24(3):217-228. Published online September 30, 2012; DOI: https://doi.org/10.35371/kjoem.2012.24.3.217

OBJECTIVES
To investigate the prevalence of musculoskeletal symptoms in university hospital healthcare workers and to evaluate the job-related factors that affect musculoskeletal symptoms.
METHODS
A questionnaire was administered to health care workers who work at the university hospital. The self-reported questionnaire included the following information: general characteristics, health behaviors, job-related factors, depression symptom, ergonomic factor, job stress, and musculoskeletal symptoms. Ergonomic factor was measured by ANSI Z-365, depression symptom by CES-D, job stress by KOSS-26 and musculoskeletal symptoms by NIOSH questionnaire.
RESULTS
A total of 1,198(64.2%) of 1,842 respondents answered and 1,183 were included in the final study population. The prevalence of musculoskeletal symptoms was 53.3%. The prevalence of musculoskeletal symptoms of males and females was 25.6% and 63.9%, respectively. After adjusting for confounding factors, total job stress score(OR=3.05, 95% CI=1.62~5.74), depression symptom(OR=2.18, 95% CI=1.07~4.43), ANSI Z-365 high risk group(OR=5.33, 95% CI=2.08~13.66) in males and total job stress score(OR=2.14, 95% CI=1.53~3.00), three-shift work(OR=1.81, 95% CI=1.26~2.60), nurses(OR=1.82, 95% CI=1.22~2.73), and ANSI Z-365 high risk group(OR=3.33, 95% CI=1.58~7.03) in females were significantly associated with musculoskeletal symptoms.
CONCLUSIONS
Shift work, nurses, ANSI Z-365 high risk group, depression symptom and job stress were related with musculoskeletal symptoms. In order to prevent musculoskeletal disorders, ergonomic improvements and stress reduction are required.

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Relationships between job stress, post-traumatic stress and musculoskeletal symptoms in firefighters and the role of job burnout and depression mediators: a bayesian network model
Amir Hossein Khoshakhlagh, Saleh Al Sulaie, Saeid Yazdanirad, Robin Marc Orr, Fereydoon Laal
BMC Public Health.2024;[Epub] CrossRef
Effect of resistance exercise on stress, lower extremity edema, and body composition in intensive care unit nurses
Ki Yong Kim, Won Jong Kim
Medicine.2022; 101(52): e32358. CrossRef
Study of Work-Related Musculoskeletal Pain and Health-related Quality of Life among Hospital Workers
Giwon Kim, Chun Sun Lee, Kyunghee Lee
The Journal of Korean Physical Therapy.2019; 31(5): 304. CrossRef
Factors Influencing Musculoskeletal Disorder Symptoms in Hemodialysis Nurses in Tertiary Hospitals
Seung Mi Jang, Eun A Kim
Journal of Korean Academy of Nursing Administration.2019; 25(5): 478. CrossRef
Related Factors of Musculoskelectal Symptoms in University Hospital Workers
Kyoung-A Han
Journal of the Korea Academia-Industrial cooperation Society.2015; 16(3): 1928. CrossRef
Risk factors of musculoskeletal symptoms in university hospital nurses
Eunkwang Ryu, Byeongjin Ye, Youngil Yi, Jungwon Kim
Annals of Occupational and Environmental Medicine.2014;[Epub] CrossRef
Gender Differences in Factors Affecting Musculoskeletal Diseases among the Korean Workers
RahIl Hwang, Kyung Ha Kim, Min Hyun Suk, Sung Won Jung
Journal of muscle and joint health.2014; 21(1): 65. CrossRef
Associations between Job Stress and Work-related Musculoskeletal Symptoms in Street Sanitation Workers
Hye-Jin Kim, Kyung-Ja June, Gyeyoung Shin, Jina Choo
Journal of Korean Academy of Community Health Nursing.2013; 24(3): 314. CrossRef

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The Relationship between Temperament, Character and Job Stress of Researchers in Science and Engineering Colleges: Hwanjin Park, Koun Seok Lee, Yoonbum Choi, Kyungeun Park, Soo Jin Lee, Jaechul Song; Korean Journal of Occupational and Environmental Medicine 2012;24(2):145-157. Published online June 30, 2012; DOI: https://doi.org/10.35371/kjoem.2012.24.2.145

Abstract PDF

OBJECTIVES
The purpose of this study was to investigate the job stress level of post-graduate students in schools of natural sciences and engineering in order to evaluate the relationship between temperament, character and job stress.
METHODS
All the 254 subjects were interviewed by means of a structured questionnaire, KOSS-SF and TCI-RS. Among them, only 220 were eligible for analysis. Statistical methods used included chi-square test, independent t-test, Mann Whitney test, ANOVA test, correlation analysis and multiple linear regression analysis with PASW ver.18.
RESULTS
Age, degree course, working hours per week, work tenure, smoking habits, exercise, and disease history were associated with job stress and hours worked per week, smoking being associated with TCI-RS subscales. For job demand, interpersonal conflict scores were higher than Korean standard. In multiple linear regression analyses, R2 scores of temperament subscales on job stress were 0.099~0.312 and those of character subscales on job stress were 0.056~0.249.
CONCLUSIONS
Job stress was associated with the unique traits of individuals, temperament and character. In order to manage job stress, the personality, as well as work environment, was found to be important considerations.

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Dietary Life, Vitamin D Status and Blood Clinical Indices of University Laboratory Workers
Jung Hyun Hwang, Hong Mie Lee, Jung Hee Kim
Korean Journal of Community Nutrition.2019; 24(3): 245. CrossRef

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The Prevalence of Musculoskeletal Symptoms and the Ergonomic Risk Factors among Oriental Melon-growing Farmers: Kyu Jung Bae, Kyoung Sook Lee, Yong Ku Kong, Gyung Jae Oh, Soo Jin Lee; Korean Journal of Occupational and Environmental Medicine 2011;23(1):1-8. Published online March 31, 2011; DOI: https://doi.org/10.35371/kjoem.2011.23.1.1

Abstract PDF

OBJECTIVES
The purpose of this study was to investigate the prevalence of musculoskeletal symptoms in oriental melon-growing farmers and to evaluate the ergonomic risk factors of melon cultivation.
METHODS
The study included 217 subjects growing oriental melons mainly in 3 villages. Subjects were interviewed by means of a structured questionnaire. Instruments used the general features and symptom table of NIOSH to evaluate tasks using ergonomic tools (REBA, OWAS).
RESULTS
A total of 202 final respondents answered. The prevalence of musculoskeletal symptoms based on the NIOSH standard criteria was 162 (75.2%). The prevalence per body part for lower back, knee and shoulder were 102 (50.5%), 86 (42.6%) and 71 (35.1%), respectively. The prevalence of pain complaints of the musculoskeletal symptom was 91 (45.0%). The prevalence of complaints per body part of lower back, knee and shoulder were 54 (26.7%), 41 (20.3%) and 37 (18.3%), respectively. Logistic regression analysis showed men were at higher risk compared to women (OR=2.409, 95% CI=1.071~5.389), and ore than 30 years of work having a higher risk compared to less than 30 years of work (OR=2.445, 95% CI=1.150~5.197). High risk tasks were moving around boxes and nursery plants for planting, transplanting nursery plants, and picking melons.
CONCLUSIONS
Musculoskeletal symptoms were very highly prevalent in oriental melon-growing farmers, showing up in 75.2% of cases. They were exposed to ergonomic high risk factors such as squatting. These risk factors must be improved in some way.

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Effects of Growth and Quantity according to Form of High Bed in Cultivation of Korean Melon
Do Yeon Won, Ji Hye Choi, Chang Hyeon Baek, Na Yun Park, Min Gu Kang, Young Jin Seo
Journal of Bio-Environment Control.2023; 32(4): 513. CrossRef
Evaluation of the prevalence of musculoskeletal symptoms, presumptive diagnosis, medical care use, and sick leave among female school meal service workers
Young Hoon Moon, Young Joon Yang, Sang Yoon Do, Jae Yoon Kim, Chul Gab Lee, Hong Jae Chae, Soo Hyeon Kim, Han Soo Song
Annals of Occupational and Environmental Medicine.2019;[Epub] CrossRef
Analysis of Working Posture for Construction Workers Using OWAS Method
Ran-i Eom, Yejin Lee
Fashion & Textile Research Journal.2018; 20(6): 704. CrossRef
Workers’ experiences with compensated sick leave due to musculoskeletal disorder: a qualitative study
Min Choi, Hyoung-Ryoul Kim, Jinwoo Lee, Hye-Eun Lee, Junsu Byun, Jong Uk Won
Annals of Occupational and Environmental Medicine.2014;[Epub] CrossRef
Development of Oriental Melon Harvesting Robot in Greenhouse Cultivation
Yu Shin Ha, Tae Wook Kim
Protected horticulture and Plant Factory.2014; 23(2): 123. CrossRef
Work-related Musculoskeletal Disorders among Agricultural Workers
Soo-Jin Lee, Hwan-Jin Park
Journal of the Ergonomics Society of Korea.2011; 30(4): 525. CrossRef

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The Comparison of Job Stress Factors, Psychosocial Stress and Their Association between Research and Manufacturing Workers in an Automobile Research and Developing Company: Hyunchul Ryou, Jeong Ok Kong, Hun Goo Lee, Soo Jin Lee, Sanghyo Chu, Yoonhee Jung, Jaechul Song; Korean Journal of Occupational and Environmental Medicine 2009;21(4):337-345. Published online December 31, 2009; DOI: https://doi.org/10.35371/kjoem.2009.21.4.337

Abstract PDF

OBJECTIVES
This study was conducted to investigate the job stress factors, psychosocial stress and their associations in workers engaged in the research and development of vehicles, and according to job role.
METHODS
We recruited 4,066 subjects from workers at a research and development center of an automobile company. A total of 2,764 workers answered the questionnaire about socio-demographic factors, health behaviors, work-related factors, subjective labor intensity, KOSS, and SF-PWI. The final analysis included 2,282 male manufacturing and research workers. Univariate analyses and multiple logistic analyses were conducted on the complete questionnaire data to compare the job stress factors, psychosocial stress and their associations between research and manufacturing workers.
RESULTS
The adjusted Odds ratios comparing the high risk group to the low risk group regarding PWI group were 2.23(95%CI=1.63-3.04) in "Lack of rewards", 1.64(95%CI=1.20-2.24) in "Interpersonal conflict", 1.59(95%CI=1.15- 2.20) in "Organizational injustice", 1.58(95%CI=1.17-2.14) in "Occupational climate" and 1.43(95%CI=1.05-1.94) in "Job insecurity" among research workers, and 2.46(95%CI=1.59 -3.80) in "Lack of rewards" and 1.94(95%CI=1.17-3.22) in "Organizational injustice" among manufacturing workers.
CONCLUSIONS
There are differences in job stress factors between research and manufacturing workers. Further studies and discussions based on quantitative methodology for seeking more fundamental causes of these differences are required to establish job stress intervention plans and policies.

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Dietary Life, Vitamin D Status and Blood Clinical Indices of University Laboratory Workers
Jung Hyun Hwang, Hong Mie Lee, Jung Hee Kim
Korean Journal of Community Nutrition.2019; 24(3): 245. CrossRef
Factors related with quality on sleep of daytime workers
Bu-il Kim, Seong-yong Yoon, Jin-seok Kim, Kuck-Hyeun Woo, Seong-yong Cho, Ho Lee, Jong-min An
Annals of Occupational and Environmental Medicine.2018;[Epub] CrossRef
Health Disparities among Korean Workers by Enterprise Size: Using Korean Labor and Income Panel Study (17th)
Bohyun Park, Sook Ja Choi, Sukyong Seo
Korean Journal of Occupational Health Nursing.2016; 25(4): 277. CrossRef
Correlation between Fatigue and Quality of Life Caused by Stress of Researchers' Work
Hye Joo Park, Yun Young Kim, Ki Hyun Park, Si Woo Lee, Jong-Hyang Yoo
Korean Journal of Occupational Health Nursing.2014; 23(3): 171. CrossRef
Influence of Knowledge and Subjective Health Status on Health Promoting Behavior About Osteoporosis in Industrial Workers
Soon Yi Seo, Jung Soon Lee
Journal of muscle and joint health.2012; 19(3): 340. CrossRef

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Posttraumatic Stress Symptoms and Related Factors in Firefighters of a Firestation: Soon Chan Kwon, Jaechul Song, Soo Jin Lee, Inah Kim, Jaewoo Koh, Hyunchul Ryou, Seok Hyun Kim, Daeho Kim, Seung Ah Jung; Korean Journal of Occupational and Environmental Medicine 2008;20(3):193-204. Published online September 30, 2008; DOI: https://doi.org/10.35371/kjoem.2008.20.3.193

Abstract PDF

OBJECTIVES
To investigate the factors related with posttraumatic symptoms and to estimate the prevalence of posttraumatic disorder of urban male firefighters.
METHODS
From a study sample comprising 260 male firefighters from one fire station, the responses from 146 who had experienced one or more traumatic events, responded to the 'Impact of Event Scale-Revised Korean version' (IES-R-K) and didn't show any evidence of depression were analyzed. We surveyed the firefighters using a self-administered questionnaire including general characteristics, job-related characteristics, IES-R-K, and a 'Firefighters and paramedics' incident stressor'.
RESULTS
The mean value of IES-R-K in this study was 11.3 and it was higher in the married firefighters than in the unmarried firefighters (p=0.005) and in the 24-hr shift workers than in the ordinary day shift workers (p=0.032). The frequency of posttraumatic stress disorder (PTSD) of the firefighters in this study using IES-R-K was 13.7%, with a cutoff point of 24/25. The overall number of experiences of 25 traumatic events was larger in emergency medical personnel and rescue workers than in other work functions (p=0.000).
CONCLUSIONS
The prevalence of PTSD symptoms in firefighters was estimated to 13.7% using IES-RK and was higher than the prevalence of PTSD in the general population. A program to manage the mental health and provide early detection for mental illness for firefighters is needed.

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Development and validation of the trauma-specific emotional counting Stroop paradigm for fMRI study
Ji Sun Hong, Dayoung Lee, Doug Hyun Han, Minyoung Sim
Journal of Affective Disorders.2024; 350: 118. CrossRef
Latent profile analysis of post-traumatic stress and post-traumatic growth among firefighters
Yongchan Shin, JeeEun Karin Nam, Aeyoung Lee, Youngkeun Kim
European Journal of Psychotraumatology.2023;[Epub] CrossRef
Psychological Risk Factors for Posttraumatic Stress Disorder in Workers After Toxic Chemical Spill in Gumi, South Korea
Ji Young Song, Kyoung-Sook Jeong, Kyeong-sook Choi, Min-gi Kim, Yeon-Soon Ahn
Workplace Health & Safety.2018; 66(8): 393. CrossRef
The Study of Korea National Firefighters’ Physical Fitness over 6-year Period (2011~2016)
Kyoungmin Noh, Wook Song, Chungkun Lee, Seiyoung Park, Jungjun Park, Hanjoon Lee, Dongil Seo, Hyunjoo Kang, Yeonsoon Ahn
INTERNATIONAL JOURNAL OF HUMAN MOVEMENT SCIENCE.2018; 12(2): 103. CrossRef
Factors Influencing Post Traumatic Stress Disorder in Crime Scene Investigators
Seon Mi Nho, Eun A Kim
Journal of Korean Academy of Nursing.2017; 47(1): 39. CrossRef
Post Traumatic Stress and Related Factors in Some Hand Replantation Patients
San-Hui Lee, Mi Ah Han, Jong Park, So Yeon Ryu
Korean Journal of Health Promotion.2016; 16(1): 67. CrossRef
Post-traumatic stress disorder and occupational characteristics of police officers in Republic of Korea: a cross-sectional study
June-Hee Lee, Inah Kim, Jong-Uk Won, Jaehoon Roh
BMJ Open.2016; 6(3): e009937. CrossRef
Minnesota multiphasic personality inventory as related factor for post traumatic stress disorder symptoms according to job stress level in experienced firefighters: 5–year study
In-Sung Chung, Mi-Young Lee, Sung-Won Jung, Chang-Wook Nam
Annals of Occupational and Environmental Medicine.2015;[Epub] CrossRef
Effects of Short-Term Music Therapy in Fire Fighters with Post-Traumatic Stress Risk
Gyu-Sik Shim, Nam-Song Kim, Sung-Hwan Bang
Journal of the Korea Academia-Industrial cooperation Society.2015; 16(6): 4040. CrossRef
The Relationship of Post-traumatic Stress, Job Stress and Turnover Intention in Emergency Department Nurses
Jeong Won Han, Byoungsook Lee
Journal of Korean Academy of Nursing Administration.2013; 19(3): 340. CrossRef
The Impact of Emotional Exhaustion and Physical Symptoms in about Rescue Workers Incident Shock
Eui-Tae Yoo, Sung-Je Cho
Journal of korean society of hazard mitigation.2013; 13(3): 69. CrossRef
Effects of a Stress Management Program Providing Cognitive Behavior Therapy on Problem-focused Coping, Job Stress, and Depression in Firefighters
Chun Youn Nam, Hee Sook Kim, So Hee Kwon
Journal of Korean Academy of Psychiatric and Mental Health Nursing.2013; 22(1): 12. CrossRef
The Influence of Field-Shock Experience and Post Traumatic Stress Perceived by Fire Officials upon Somatic Symptoms and Coping Methods
Tae-Young Moon
Journal of the Korea Academia-Industrial cooperation Society.2013; 14(8): 3815. CrossRef
Construction of a Post-traumatic Stress Model for Fire Fighters
Yoonjung Kim, Jeongyee Bae
Journal of Korean Academy of Psychiatric and Mental Health Nursing.2012; 21(4): 282. CrossRef
Health Hazards in Firefighters
Kyoo Sang Kim
Hanyang Medical Reviews.2010; 30(4): 296. CrossRef
Occupational Health and Fitness for Work of Firefighters
Inah Kim, Jaechul Sung
Journal of the Korean Medical Association.2008; 51(12): 1078. CrossRef

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The Prevalence of Playing-Related Musculoskeletal Disorders of Music College Freshmen Playing String Instruments: Jaewoo Koh, Soo jin Lee, Yong Kyu Kim, Inah Kim, Soon Chan Kwon, Si Bog Park, Mi Jung Kim, Seongwoo Kim, Kyoungok Park, Hyunmi Kim, Jaegwang Song, Jaechul Song; Korean Journal of Occupational and Environmental Medicine 2006;18(3):189-198. Published online September 30, 2006; DOI: https://doi.org/10.35371/kjoem.2006.18.3.189

Abstract PDF

OBJECTIVES
This study was conducted to investigate the prevalence of playing-related musculoskeletal disorders (PRMDs) of some music college freshmen majoring in string instruments.
METHODS
The study subjects were 199 freshmen majoring in strings at three colleges in Seoul and surrounds. The symptom prevalence and related factors of PRMDs were surveyed with a self-administered questionnaire. The Southampton Protocol was used to diagnose PRMDs.
RESULTS
The freshmen had played for 9 years and 7 months on average. The symptom prevalence of PRMDs according to the modified-NIOSH surveillance criteria was 73.4%. The shoulder was the most prevalent symptom complaint site. The prevalence of PRMDs by the Southampton Protocol was 54.3% and myofascial pain syndrome was the most common. The instrument (violin or viola vs. cello or bass), regular breaks, self perceived evaluation of playing posture and regular computer use had a significant association with the symptom prevalence of PRMDs in univariate logistic regression analysis (p<0.05). The instrument, regular breaks and regular computer use were significant variables affecting the symptom prevalence of PRMDs in multivariate logistic regression analysis (p<0.05).
CONCLUSIONS
This study suggests that music college freshmen playing strings are a high risk group for musculoskeletal disorders. Therefore, the prevention of PRMDs requires the establishment of an ergonomic playing-environment, and the education of comfortable posture and stretching program such as musical warming up and physical stretching. It is especially important to form an effective treatment and rehabilitation system based on earlier diagnosis for musicians who are suffering from the PRMDs.

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Musicians' Medicine: Musculoskeletal Problems in String Players
Han-Sung Lee, Ho Youn Park, Jun O Yoon, Jin Sam Kim, Jae Myeung Chun, Iman W. Aminata, Won-Joon Cho, In-Ho Jeon
Clinics in Orthopedic Surgery.2013; 5(3): 155. CrossRef
The Prevalence of Playing-related Musculoskeletal Disorders of Traditional Korean Musical Instrument Player
Jung Yong Kim, Seung Nam Min, Young Jin Cho, Jun Hyeok Choi
Journal of the Ergonomics Society of Korea.2012; 31(6): 749. CrossRef

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Analysis of Shoulder Range of Motion in Shoulder Myofascial Pain Syndrome: Jeong Soo Kim, In Ah Kim, Soo Jin Lee, Yong Kyu Kim, Si Bog Park, Jae Woo Koh, Jaechul Song; Korean Journal of Occupational and Environmental Medicine 2005;17(4):333-342. Published online December 31, 2005; DOI: https://doi.org/10.35371/kjoem.2005.17.4.333

Abstract PDF: OBJECTIVE: This study was carried out to investigate if the measurement of range of motion(ROM) could be applied in the diagnosis of Myofascial Pain Syndrome(MPS) and to determine the severity by analyzing ROM in MPS patients.
METHODS
The study subjects were 476 female telephone number information service workers. Southampton Protocol and Pittsburgh Protocol were used to diagnose MPS and to measure ROM. ROMs were measured by 2 inclinometers exercising each shoulder passively and actively in 5 directions ; abduction, forward flexion, extension, external rotation, and internal rotation.
RESULTS
Compared to the normal group (n=147), the mean of right side ROM in the subjects (n=270) with same side MPS was 2.1 degrees(SD=11.5) lesser in active extension and 1.7 degrees(SD=10.4) lesser in passive extension. Compared to the mild group (n=210), the mean of right side ROM in the patients with same side severe MPS (n=58) was lesser in all directions. Especially in active forward flexion, passive forward flexion, active extension, passive extension and active external rotation, ROM in the subjects with severe MPS was lesser by 6.5 degrees(SD=13.1), 5.1 degrees(SD=12.8), 5.9 degrees(SD=11.8), 5.0 degrees(SD=10.6) and 3.9 degrees(SD=9.8), respectively, than those of the subjects with mild MPS. Compared to the subjects with left side mild MPS(n=172), ROM in the subjects with left side severe MPS (n=59) was 5.3 degrees(SD=13.3) lesser in active forward flexion.
CONCLUSIONS
In this study, ROMs in the subjects with severe MPS tended to be lesser than those in mild patients. This tendency was more prominent in the right side than the left, active range of motion than passive and forward flexion and extension than others. The results of this study are expected to help diagnose shoulder MPS and determine severity.

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Factors Associated With the Personal Protective Equipments(PPEs) Wearing of Workers in Small Scale Industries: Yong Kyu Kim, Hyun Joo Kim, Soo Jin Lee, Eun Chul Jang, Sang Cheol Rho, Jae Chul Song; Korean Journal of Occupational and Environmental Medicine 2002;14(3):315-325. Published online September 30, 2002; DOI: https://doi.org/10.35371/kjoem.2002.14.3.315

Abstract PDF

OBJECTIVE: The aim of this study was to identify the factors associated with the wearing of Personal Protective Equipment (PPE) in small scale industries.
METHODS
In a cross-sectional study, the data were obtained from self-administered questionnaires, a special health examination and the industrial hygiene records. The study included 230 workers in small-scale industries (the print industry and automobile repair shops), which were provided with a subsidiary occupational health program funded by government in 1998. The authors used the Precede-Proceed model.
RESULTS
Among the subjects who were recommended to wear a PPE, 32.7% (35/107) wore the gas/vapor respirators, 43.9 % (101/230) wore the particulate respirators, and 44.3 % (102/230) wore hearing aids. Among them, 64.3 % (148/230) wore one of the above PPE. The wearing of PPE wearing was associated with knowledge (OR=2.34), the value of prevention (OR=3.46), social support (OR=2.78), the type of task (OR=2.18-4.47), and income level (OR=7.64).
CONCLUSIONS
In small scale industries, the proportion workers wearing PPE was low. To increase this proportion, the reinforcing, enabling, and environmental factors as well as the predisposing factors need to be modified.

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Occupational Inhalation Health Risk Assessment of TCE Exposure in the Korean Manufacturing Industry
Sueji Seo, Saemi Shin, Sanghoon Byeon
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In-Kyu Park, Sa-Woo Lee, Jong-Hyeon Jung, Young Gyu Phee
Journal of Korean Society of Occupational and Environmental Hygiene.2014; 24(2): 229. CrossRef
Change of Stages and Related Factors for Wearing of Hearing Protection Device among Noisy Workplace-workers
Young Mi Kim, Ihn Sook Jeong
Journal of Korean Academy of Nursing.2010; 40(5): 736. CrossRef

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Manganese-induced Oxidative Stress in the Corpus Striatum of the Rat Brain: Soo Jin Lee, Soon Oh Hong, Hyun Chul Koh; Korean Journal of Occupational and Environmental Medicine 2002;14(1):23-33. Published online March 31, 2002; DOI: https://doi.org/10.35371/kjoem.2002.14.1.23

Abstract PDF: OBJECTIVES
This study was undertaken to identify the effect of oxidative stress on the pathology of manganese intoxication through an analysis of manganese concentrations, superoxide dismutase (SOD) activities, malondialdehyde (MDA) concentrations, and the compositional changes of fatty acids from the corpus striatum of the rat brain.
METHODS
Ten Sprague-Dawley rats were equally divided into two groups. Five rats in the experimental group were administered MnCl2 intraperitoneally for 4 weeks (4 mg/kg once daily, 5 days per week) and another five rats from the control group were given normal saline. Twenty-four hours after the last injection, the rats were decapitated and, the corpus striatum was isolated from the brain.
RESULTS
In the corpus striatums of the experimental group, manganese concentrations increased significantly by 139 % (p<0.01). The SOD activities decreased significantly by 81 % (p<0.01) and the MDA concentrations increased significantly by 138 % (p<0.01) as compared to the control group. Among fatty acids, total n-6 polyunsaturated fatty acids (PUFAs) increased significantly by 325 % (p<0.01) as compared with the control group. Arachidonic acids (AA) increased by 341 % (p<0.01), and these increases were composed mostly of n-6 polyunsaturated fatty acids (PUFA). Among n-3 PUFAs, with the exception of linolenic acids, eicosapentanoic acid (EPA) decreased significantly by 72 % (p<0.05) and docosahexanoic acids (DHA) decreased by 67 % (p<0.05) as compared with the control group.
CONCLUSIONS
Our results suggest that the oxygen free radicals produced by manganese may cause compositional changes of fatty acids in the corpus striatum of the rat brain. The characteristics of the fatty acids'compositional changes by manganese were a decrease of EPAs and DHAs (n-3 PUFAs), and an increase of AAs (n-6 PUFAs). These changes coupled with the decrease of SOD activity and the increase of MDA, suggest that manganese neurotoxicity is caused by lipid peroxidation mediated with oxygen free radicals, particularly superoxide radicals.

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Changes of Superoxide Dismutase Activity in Cadmium-induced Acute Nephrotoxicity of Rats: Soo Jin Lee, Hyun Chul Koh, Chung Yill Park; Korean Journal of Occupational and Environmental Medicine 2001;13(4):393-400. Published online December 31, 2001; DOI: https://doi.org/10.35371/kjoem.2001.13.4.393

Abstract PDF: OBJECTIVES
To investigate the role of superoxide dismutase(SOD) in the pathogenesis of cadmium-induced acute nephrotoxicity.
METHODS
Rats treated with a single intraperitoneal injection of cadmium(as CdCl2, 1 mg/kg) were included in the cadmium-treated group; the control group comprised untreated rats. 24-hour urine samples were obtained prior to sacrifice on days 1, 2, 4, 8 and 16(N = 10 per group), respectively. The activity of SOD and concentration of cadmium were measured in the homogenates of the renal cortex. Nephrotoxicity indices such as N-acetyl-beta-D-glucosaminidase(NAG) activity, total protein, and 24-hour urine volume, and the cadmium concentrations in the urine were measured.
RESULTS
The cadmium injection caused a significant increase of cadmium concentration in the renal cortex on days 1 and 2, and in the urine on days 1, 2 and 4. The NAG activities and total protein concentrations in urine were significantly increased on days 1, 2 and 4, and on days 1, 4 and 8, respectively. The peak values of NAG activity and total protein in urine were observed on days 1 and 4, respectively. A significant decrease of 24- hour urinary volume was induced on day 1. Renal SOD activity was significantly inhibited on day 1. Finally, on day 8, SOD activity was significantly increased and all nephrotoxicity indices except urinary total protein returned to the control level.
CONCLUSIONS
These results suggest that cadmium induces initial depression of SOD enzyme activities in the renal cortex followed by a later activation, and that the initial depression of this enzyme plays an important role in mediating the proteinuric injury of cadmium-induced acute nephrotoxicity.

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The Prevalence of Cumulative Trauma Disorders of Upper Extremities Among Watch Assembly Workers in some Small-scaled Industr: Eun Chul Jang, Hyun Ju Kim, Young Jun Kwon, Si Bog Park, Soo Jin Lee, Jae Cheol Song; Korean Journal of Occupational and Environmental Medicine 2000;12(4):457-472. Published online December 31, 2000; DOI: https://doi.org/10.35371/kjoem.2000.12.4.457

Abstract PDF

Objectives
The prevalence of cumulative trauma disorders of upper extremities mons watch assembly workers in small-scaled industry was studied.
Methods
In 83 workers at five watch assembly factories, symptoms and psychosocial questionnaire, ergonomic Interview, physical examination were conducted.
Results
Prevalence of self-reported symptoms was 54.2% and neck 34.9%, wrist/hand 31.3%, shoulder 30.1%, elbow/arm 18.0% by anatomical site. Prevalence of cumulative trauma disorders was 45.8%. Most common disease was myofascial pain syndrome (31.3%). The other diseases were De Quervain disease (9.6%), tenosynovitis/tendinitis at wrist/hand (9.6%), bicipital tendinitis(6.0%), fat. epicondylitis(4.8%), meIn. epicondylitis(2.4%), and cervical disc disease(2.4%). As result of ergonomic interview, repetitiveness was 79(98.8%). There were no differences in the prevalence of self-reported symptoms and cumulative trauma disorders for age, sex, marital status, duration of work In the study, The significant factors of cumulative trauma disorders were occupational task and psychosocial stress in the study. The prevalence of cumulative trauma disorders in high strain group was hlgher (68.4%) than other three groups. The prevalence of self-reported symptoms and cumulative trauma disorders in assembly task was higher (70.0%, 64.0%) than other two tasks.
Conclusions
Prevalence of self-reported symptoms was 54.2%, prevalence of cumulative trauma disorders was 45.8% in watch assembly workers. In this study, factor related to self-reported symptoms was occupational task and factors relaxed to cumulative trauma disorders were occupational task and psychosocial stress. This results suggest that differences of ergonomics and environment in occupational task cause differences of prevalence of self-reported symptoms and cumulatlve trauma disorders.

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Associations between Job Stress and Work-related Musculoskeletal Symptoms in Street Sanitation Workers
Hye-Jin Kim, Kyung-Ja June, Gyeyoung Shin, Jina Choo
Journal of Korean Academy of Community Health Nursing.2013; 24(3): 314. CrossRef
Relationship between occupational stress and musculoskeletal symptoms of upper extremities among dental hygienists
So-Young Lee, Hyo-Jin Ko, Byeng-Chul Yu
Journal of Korean society of Dental Hygiene.2012; 12(5): 897. CrossRef

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A Study of Relationship between Exposure to Manganese Chloride and Malondialdehyde in Rat Tissues: Chul Jin Moon, Soo Jin Lee, Se Hoon Lee; Korean Journal of Occupational and Environmental Medicine 2000;12(3):338-345. Published online September 30, 2000; DOI: https://doi.org/10.35371/kjoem.2000.12.3.338

Abstract PDF: OBJECTIVES
This research was intended to investigate the relationship between manganese and malodndialdehyde concentration in tissues of rats exposed to maganese chloride.
METHODS
The study groups were 12 manganese treated rats and 9 control rats. Manganese treated rats were given intraperitoneally manganese chloride (Mn, 4 mg/kg) daily for a period of 30 days except Sunday. Control rats were injected 1ml of saline. The plasma manganese concentrations of rats were determined by graphite furnace atomic absorption spectrometry. The tissue manganese concentration was determined by flame atomic absorption spectrometry. Malondialdehyde, the product of lipid peroxidation was determined by ultraviolet-visible spectrophotometry. The plasma malondialdehyde was determined by gas chromatography with mass-detector. Protein concentration was quantified by ultraviolet-visible spectrometry and was used for the compensation of tissue malondialdehyde and manganese concentration.
RESULTS
Manganese concentrations of plasma, brain, liver, and pancreas were very significantly higher in the manganese-treated rats than in the control rats. Malondialdehyde concentration of plasma, brain, and pacrease were significantly higher in the manganese-treated rats than in the control rats. The concentration of malondialdehyde was correlated with manganese levels in plasma, brain and pancreas.
Conclusion
Based on the results obtained as above, it was concluded that the malondialdehyde, product of lipid peroxidation was related to the cell death due to dosing excess manganese.

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Effect of Chronic exposure to Low-Levels of n-Hexane on Peripheral Nervous System: Hyunju Kim, Young Jae Park, Soo Jin Lee, Jaechul Song, Eun Cheol Jang, Kyung Young Lee, Sanghyo Shim; Korean Journal of Occupational and Environmental Medicine 1999;11(3):350-360. Published online September 30, 1999; DOI: https://doi.org/10.35371/kjoem.1999.11.3.350

Abstract PDF

OBJECTIVES
The effect of chronic exposure to low levels of n-hexane on peripheral nervous system and the relationship between duration of employment and impairment of peripheral nervous system was studied.
METHODS
In 21 workers at two shoe - maker factories and 21 unexposed controls, measurement of exposure of solvents, symptom Questionnaire, physical examination and electrophysiological study were conducted.
RESULTS
Mean ages of study subjects in the exposed and the unexposed were 39.9 and 40.1 years old. Mean durations of employment were 15.1 and 10.0 years, respectively. Mean concentraions of urinary 2,5-HD were 2.23 mg/kg creatinine, 0.23 mg/kg creatinine, respectively. Mean concentration of solvents in air were 21.1 ppm of n-hexane, 72.2 rpm of toluene and 0.5 ppm of MEK. There were no differences in the prevalence of subjective symptoms and abnormal neurological signs between the exposed and the unexposed. But vibration extinction time(VAT) of the exposed(8.8 second) was shorter than that of the unexposed(11.9 second)(p < 0.05). Mean values of electrophysiological studies(EPS) of the two groups were within normal limit. However, mean conduction velocity of median motor nerve and median F wave(MMNCV and MFCV), mean amplitude of median sensory action potential(MSAP) were decreased in the exposed(p < 0.05). Moreover, the rate of abnormal finding more than one in sensory nerves wart increased in the exposed than those in the unexposed(p,0.05). Correlation coefficients between duration of employment and mean conduction velocity of median sensory nerve (MSNCV) and between duration of employment and MFCV were -0.57 -0.43, respectively(p < 0.05).
CONCLUSIONS
These results showed that chronic (mean 15 years) low level(mean 23 ppm) exposure to n-hexane cause subclinical impairment of peripheral nervous system. These results also suggest that the longer duration of employment, the shorter values of EPB and VAT.

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Occupational Neurological Disorders in Korea
Eun-A Kim, Seong-Kyu Kang
Journal of Korean Medical Science.2010; 25(Suppl): S26. CrossRef

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Distribution of Asymmetrical Hearing Loss Among the Workers participated in Noise-specific Health Examination: Youngjun Kwon, Kyungrae Kim, Soo Jin Lee, Jaechul Song; Korean Journal of Occupational and Environmental Medicine 1999;11(3):361-372. Published online September 30, 1999; DOI: https://doi.org/10.35371/kjoem.1999.11.3.361

Abstract PDF: OBJECTIVES
Noise-induced hearing lose(NIHL) is characterized by bilaterally symmetrical hearing loss, but some screening audiometries of employees who were exposed noise showed asymmetry. Therefore, this study was carried out to evaluate distribution of asymmetrical hearing loss and factors influencing asymmetries.
METHODS
Study subjects were 294 male employees who have participated in 1st and 2nd noise-specific health examination.
RESULTS
The interaural threshold difference of 20 dB or more at 4,000 Hz was classified as asymmetry. Among 294 NIHL employees. 19% had left asymmetric hearing loss. 22% had right asymmetric hearing loss. and overall asymmetry were 41%. Prevalence of asymmetry at 4,000 Hz significantly more decreased in middle(80~84 dB (A)) and high-level noise exposure groups(> or =85 dB(A)) than low-level exposure group and significantly increased as greater hearing threshold level in the worse ear. Prevalence of left asymmetry at 4,000 Hz significantly increased as greater hearing threshold level in the worse ear than right asymmetry. The interaural difference was significantly greater in the left asymmetry.
CONCLUSIONS
Noise exposure produced asymmetric hearing loss(interaural asymmetry was 20 dB and more in 41% of case) and left ear was more susceptible to noise demage than right ear.

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Association between Musculoskeletal Subjective Symptoms and the MMPI (Minnesota Multiphasic Personality Inventory) Profile of Female VDT Operators: Jae Cheol Song, Weon Young Lee, Young Jun Kwon, Mo Ran Ki, Soo Jin Lee, Si Bok Park, Jung Hyun Nahm; Korean Journal of Occupational and Environmental Medicine 1998;10(4):599-609. Published online December 31, 1998; DOI: https://doi.org/10.35371/kjoem.1998.10.4.599

Abstract PDF

A study was conducted to assess the association between musculoskeletal subjective symptoms and the MMPI(Minnesota Multiphasic Personality Inventory) profile. The study subjects were 539 female operators of telecommunication company in Seoul, and were interviewed with subjective symptom questionnaire and MMPI. Results were as follows 1. 77.5% of the study subjects complained subjective symptoms on the shoulder, 73.8% on the neck, 71.8% on the lower back, 67.5% on the arm, 67.2% on the hand, 39.8% on the elbow, respectively. According to NIOSH symptom criteria, 63% complained on the shoulder, 57.4%, 54.6% on the lower back, 53.2% on the hand, 45.9% on the arm, 29.8% on the elbow, respectively. 2. Among the MMPI clinical scales, Hs(Hypochondriasis), Hy(Hystria) and Dep (Depression) scales showed significant differences according to the numbers of subjective symptom(NIOSH criteria), VAS(Visual Analogue Scale), and the experience of sick leave (each by ANOVA, p<0.05). 3. The association between the numbers of subjective symptom site for NIOSH symptom criteria, the personal history of sick leave and the MMPI profile that has more than 70 points in anything of Hs, Dep and Hy scales was showed significantly (each by x(2)-test, p<0.05).

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Relationships between MMPI Scales under Defensive Attitude and Safety and Health Indices
Jong Hwan Kim, Byung Yong Jeong, Myoung Hwan Park
Journal of the Ergonomics Society of Korea.2016; 35(6): 611. CrossRef

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Sister-Chromatid Exchanges in Lymphocytes of Medical Students Exposed to Formaldehyde: Soo Jin Lee, Jeong Il Son, Sang Hyo Sim, Kee Young Kim, Jaecheol Song, Suo Ja Chu, Sung Han Shim, Youl Hee Cho, Doo Jin Park; Korean Journal of Occupational and Environmental Medicine 1998;10(2):282-289. Published online May 31, 1998; DOI: https://doi.org/10.35371/kjoem.1998.10.2.282

Abstract PDF

Sister-chromatic exchanges measured in the peripheral lymphocytes of 15 non-smoking medical students after exposure to formaldehyde during a 24-week anatomy class showed a small but significant (p=0.0468) increase when compared with samples obtained from the same individuals immediately before exposure. Mean frequencies of sister-chromatic exchange of cultured peripheral lymphocytes were 5.40+/-0.24 from the samples before exposure and 5.87+/-0.22 from the same samples after exposure. Breathing-zone air samples collected by formaldehyde monitoring kit with digital colorimeter (SKC) showed a mean concentration of 0.72+/-0.02 ppm formaldehyde.

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The effect of formaldehyde on neurobehavioral performance of student during cadaver dissection
Yong Sakong, Hee-Yoon Jo, In-Gook Lee, Kyeong-Soo Lee, Man-Joong Jun
Yeungnam University Journal of Medicine.2016; 33(2): 85. CrossRef

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A Suspicious Case of Dimethylformamide Induced Fulminant Hepatitis in Synthetic Leather Workers: Soo Keun Kim, Soo Jin Lee, Kyou Chull Chung; Korean Journal of Occupational and Environmental Medicine 1995;7(1):186-190. Published online February 28, 1995; DOI: https://doi.org/10.35371/kjoem.1995.7.1.186

Abstract PDF

A man who worked in the synthetic leather manufacturing plant for 3 months died at November 3. Author review the medical record, the death certificate, and interviewed his wife and the doctor who treated him. His major job was DMF handling. At the working place, he felt severe health problem, and admitted to the hospital via emergency clinic. He complained severe abdominal pain and showed jaundice and ascites, He suffered hepatic coma and respiratory insufficiency from fulminant hepatitis from 19th days after admission. Drug abuse, hepatitis (A, B, C), and alcoholic hepatitis were rule out with his history and serological study data, As a result, author couldn't find any cause of death, but fuIminant hepatitis from DMF toxicity.

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