Annals of Occupational and Environmental Medicine

Yong Chul Shin

5 Articles

Risk Factor Assessment Using Surface Electromyography and Electrogoniometer among Automobile Part Manufacturers: Dongmug Kang, Cheol Ho Yee, Yong Chul Shin, Eun A Kim, Ji Hoon Woo, Byung Mann Cho, Su Ill Lee; Korean Journal of Occupational and Environmental Medicine 2005;17(4):267-277. Published online December 31, 2005; DOI: https://doi.org/10.35371/kjoem.2005.17.4.267

OBJECTIVES
As automobile part manufacturing is characterized by high speed and high repetition, observation methods which are usually utilized for static posture are inappropriate to evaluate musculoskeleatal risk factors. This study quantified the risk factors of musculoskeletal disorders on the forearm and suggested exposure limits by estimating the risk factors using surface electromyography (EMG) and electrogoniometer.
METHODS
Ten percent of the total workers at 3 automobile part manufacturing factories were randomly selected, and 99 male workers were recruited as study subjects. The study was conducted during May 2003 to September 2004. The workers were equipped with electrogoniometers on the wrist and the elbow, surface EMGs on the skin of the flexor digitorum superficialis (FDS) and extensor carpi radialis (ECR) muscles, and the heart beat recorder during work as indicators of joint movement, local muscle tension and physical work load, respectively.
RESULTS
After controlling for age, body mass index and job stress, wrist flexion maximum angle, FDS relative activity (RA) and ECR RA were significantly associated with forearm musculoskeletal symptoms. The odds ratios of the forearm were 5.0(95% CI: 1.1-22.7), 14.0(95% CI: 1.5-128.8) and 7.3(95% CI: 1.1-49.4) for wrist flexion maximum angle more than 76 degrees, FDS RA more than 2.8%, and ECR RA more than 3.5%, respectively.
CONCLUSIONS
Joint angle and focal muscle activity were associated with forearm musculoskeletal symptoms. To reduce forearm musculoskeletal symptoms among automobile part manufacturers, the wrist flexion angle, and FDS and ECR activity need to be reduced below the guidelines recommended in this study.

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Quantification of physical stress experienced by obstetrics and gynecology sonographers: A comparative study of two ultrasound devices
Yong-Ku Kong, Min-Uk Cho, Chae-Won Park, Seoung-Yeon Kim, Min-Jung Kim, Junpil Moon, Sungwon Lim, Byung-Mo Oh, Banseok Han, JunHee Choi, Kyeong-Hee Choi
Applied Ergonomics.2022; 100: 103665. CrossRef

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Risk Factors of Work-related Musculoskeletal Symptoms Among Ship-yard Workers: Jong Eun Kim, Dong Mug Kang, Yong Chul Shin, Mi A Son, Jung Won Kim, Jin Hong Ahn, Young Ki Kim, Deog Hwan Moon; Korean Journal of Occupational and Environmental Medicine 2003;15(4):401-410. Published online December 31, 2003; DOI: https://doi.org/10.35371/kjoem.2003.15.4.401

Abstract PDF

OBJECTS: This study was conducted to prepare the primitive data of work-related musculoskeletal disorders (WMSDs) among ship-yard workers in order to set up management and prevention strategies by investigating the risk factors for WMSD symptoms.
METHODS
We carried out a self-administered questionnaire survey of 7,237 blue-collar workers during October 2001, in a ship-yard of Kyungsangnam Province. We collected 2,223 questionnaires and analysed 1,985. The questionnaires included demographic data, quick exposure check (QEC) for ergonomic risk factors, and Karasek's job content questionnaires (JCQ) for job stress. WMSDs were evaluated by the National Institute of Occupational Safety and Health (NIOSH) surveillance criteria.
RESULTS
Multiple logistic regression analysis was used to examine the relationship between risk factors and musculoskeletal symptoms. From the results, significant variables were age, maximum weight of manual handling material, frequency of the back movement during manual handling tasks, deviation or bending of the wrists/hands position, excessively bent or twisted head/neck, job dissatisfaction, and high job demand.
CONCLUSIONS
In order to reduce musculoskeletal disorders of ship-yard workers, it is recommended to reduce the frequency of back movement during manual handling tasks, wrists/hand deviation or bending, and neck bending or twisting. In addition, devoted effort is needed to increase job satisfaction and to reduce job demand.

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Validation of Types of Body Pain Areas and Related Factors in the Korean Aged Using Latent Class Analysis
Sang Ye Shin, Eun Suk Lee
Research in Community and Public Health Nursing.2023; 34: 22. CrossRef
Musculoskeletal Disorder Symptoms and Its Related Factors among Male Workers in Manufacturing Industries
Seung-Hyun Lee, Young-Chae Cho
Journal of the Korea Academia-Industrial cooperation Society.2015; 16(10): 6627. CrossRef
The Study of Muscle Fatigue and Risks of Musculoskeletal System Disorders from Text Inputting on a Smartphone
Kyung Ko, Hee-Soo Kim, Ji-Hea Woo
Journal of the Ergonomics Society of Korea.2013; 32(3): 273. CrossRef
Medical Managements of Musculoskeletal Diseases in Shipbuilding Industry
Jong-Eun Kim, Young-Ki Kim, Dong-Mug Kang
Journal of the Ergonomics Society of Korea.2012; 31(1): 157. CrossRef
Musculoskeletal Disorder Symptoms and Related Factors among Male Workers in Small-scale Manufacturing Industries
Seung-Hyun Lee, Ju-Yeon Lee, Young-Chae Cho
Journal of the Korea Academia-Industrial cooperation Society.2012; 13(9): 4025. CrossRef
Development and Evaluation of the Neck Supporter for Preventing Neck-related MSDs
Yong-Ku Kong, Jun-Goo Han
Journal of the Ergonomics Society of Korea.2011; 30(2): 297. CrossRef

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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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Bladder Cancer with Exposure to Benzidine-based Dyes of Dyer: Sung Ah Kim, Jong Woo Lee, Bup Wan Kim, Yong Chul Shin; Korean Journal of Occupational and Environmental Medicine 1999;11(2):304-312. Published online June 30, 1999; DOI: https://doi.org/10.35371/kjoem.1999.11.2.304

Abstract PDF

This is the first report on an occupational bladder cancer in Korea. The ease is 41 years old man who worked as a dyer for 17 years at two dyeing factories, which handled nylon and polyester fabrics in Taegu. He was exposed to many kinds of dyes during weighing, mixing, dissolving and dyeing processes. Among many kinds of acid, disperse and direct dyes that he has been exposed to, several dyes have confirmed to contain benzidine-based dyes, one was o-tolidine-based dye, and one was o-dianisidine-based dye. He visited a hospital due to the gross hematuria and urinary frequency in June, 1998, and he had radical cystectomy with ileal conduit diversion. He had smoked a half-pack of cigarette for 20 years. The main risk factor of bladder cancer is smoking, however, he was relatively a light smoker than usual Korean men. He was exposed to the definite occupational carcinogen even though the level was relatively lower than that of dye manufacturers. His age was younger than the prevalence age of bladder cancer caused by smoking. These evidences support that the dyer' s bladder cancer could be related to the occupational exposure to benzidine-based dyes.

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A work-relatedness assessment in epidemiological case investigation of occupational cancers: II. Practice: an upper urinary tract cancer in a dyer
Kihun Kim, Hyeoncheol Oh, Jungwon Kim
Annals of Occupational and Environmental Medicine.2020;[Epub] CrossRef
Occupational Cancers with Chemical Exposure and their Prevention in Korea: A Literature Review
Kyung-Taek Rim
Asian Pacific Journal of Cancer Prevention.2013; 14(6): 3379. CrossRef
Occupational Reproductive Function Abnormalities and Bladder Cancer in Korea
Jungsun Park, Kyong-Sok Shin, Yangho Kim
Journal of Korean Medical Science.2010; 25(Suppl): S41. CrossRef
Occupational Diseases in Korea
Seong-Kyu Kang, Eun A Kim
Journal of Korean Medical Science.2010; 25(Suppl): S4. CrossRef

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Performance of Neurobehavioral Tests Among Welders Exposed to Manganese: Youngwoo Jin, Yangho Kim, Kyoo Sang Kim, Euna Kim, Young Sook Cho, Yong Chul Shin, Changho Chai, Younghyu Choi, Se Hoon Lee, Young Hahn Moon; Korean Journal of Occupational and Environmental Medicine 1999;11(1):1-12. Published online March 31, 1999; DOI: https://doi.org/10.35371/kjoem.1999.11.1.1

Abstract PDF

To study neurobehavioral effects for manganese fume exposure of welders, we administrated questionnaire about subjective symptom, related with manganese exposure. Neurobehavioral Core Test Battery of World Health Qrganization(NCTB) and finger tapping for 98 welders and 29 non-welding workers. We adopted welding duration as a criterion for exposure assessment, because of the lack of the longitudinal valid data and differences in airborne concentrations of manganese in welding types, such as shielded metal arc and CO2 arc welding. Neurologic, musculoskeletal and concentration symptoms were significantly increased by increase of welding duration. Performance of finger tapping preferred hand, Santa Ana dexterity test preferred hand and correct number of pursuit aiming were significantly decreased by increase of welding duration. These results comparable with previous studies that suggest neurobehavioral test, especially motor test, to be an appropriate tool to detect early neurobehavioral abnormalities related with manganeses exposure.

Citations

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Manganese exposure and cognitive performance: A meta-analytical approach
Thomas Vlasak, Tanja Dujlovic, Alfred Barth
Environmental Pollution.2023; 332: 121884. CrossRef
Derivation of an occupational exposure level for manganese in welding fumes
Lisa A. Bailey, Laura E. Kerper, Julie E. Goodman
NeuroToxicology.2018; 64: 166. CrossRef
Neurobehavioral Deficits and Parkinsonism in Occupations with Manganese Exposure: A Review of Methodological Issues in the Epidemiological Literature
Robert M. Park
Safety and Health at Work.2013; 4(3): 123. CrossRef
Neuropsychological effects of low-level manganese exposure in welders
Wisanti Laohaudomchok, Xihong Lin, Robert F. Herrick, Shona C. Fang, Jennifer M. Cavallari, Ruth Shrairman, Alexander Landau, David C. Christiani, Marc G. Weisskopf
NeuroToxicology.2011; 32(2): 171. CrossRef
Occupational Psychiatric Disorders in Korea
Kyeong-Sook Choi, Seong-Kyu Kang
Journal of Korean Medical Science.2010; 25(Suppl): S87. CrossRef
Occupational Neurological Disorders in Korea
Eun-A Kim, Seong-Kyu Kang
Journal of Korean Medical Science.2010; 25(Suppl): S26. CrossRef
Exposure-Response Relationship and Risk Assessment for Cognitive Deficits in Early Welding-Induced Manganism
Robert M. Park, Rosemarie M. Bowler, Harry A. Roels
Journal of Occupational & Environmental Medicine.2009; 51(10): 1125. CrossRef
State-of-the-Science Review: Does Manganese Exposure During Welding Pose a Neurological Risk?
Annette B. Santamaria, Colleen A. Cushing, James M. Antonini, Brent L. Finley, Fionna S. Mowat
Journal of Toxicology and Environmental Health, Part B.2007; 10(6): 417. CrossRef
High signal intensity on magnetic resonance imaging as a predictor of neurobehavioral performance of workers exposed to manganese
Yong Chul Shin, Euna Kim, Hae-Kwan Cheong, Sungil Cho, Joon Sakong, Kyoo Sang Kim, Jung Sun Yang, Young-Woo Jin, Seong-Kyu Kang, Yangho Kim
NeuroToxicology.2007; 28(2): 257. CrossRef
Sequelae of fume exposure in confined space welding: A neurological and neuropsychological case series
Rosemarie M. Bowler, Sanae Nakagawa, Marija Drezgic, Harry A. Roels, Robert M. Park, Emily Diamond, Donna Mergler, Maryse Bouchard, Russell P. Bowler, William Koller
NeuroToxicology.2007; 28(2): 298. CrossRef
Issues in neurological risk assessment for occupational exposures: The Bay Bridge welders
Robert M. Park, Rosemarie M. Bowler, Donald E. Eggerth, Emily Diamond, Katie J. Spencer, Donald Smith, Roberto Gwiazda
NeuroToxicology.2006; 27(3): 373. CrossRef

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