Annals of Occupational and Environmental Medicine

Sang Hyuk Jung

3 Articles

Development of a Fatigue Symptom Checklist for Commercial Drivers: An Experimental Trial: Kyoung Ok Park, Myung Sun Lee, Sang Hyuk Jung, In Seok Kim, Young A Oh; Korean Journal of Occupational and Environmental Medicine 2004;16(3):287-302. Published online September 30, 2004; DOI: https://doi.org/10.35371/kjoem.2004.16.3.287

OBJECTIVES
Fatigue is a primary human factor for decreased job performance in the workplace. It is well documented that drowsiness is a typical symptom of fatigue and is closely associated with commercial drivers'safety and well-being. However, few studies have been conducted to develop or validate fatigue symptom instruments for a working population. The main purpose of this study was to develop a general fatigue checklist and a driving fatigue checklist for Korean commercial drivers.
METHODS
A total of 287 bus drivers in a commercial transportation company participated in a self-administered survey that was designated Study 1. Based on the statistical results of Study 1, a focus meeting with 16 professional consultants was conducted to revise the fatigue symptom instrument for Study 2. In Study 2, 288 commercial drivers (156 bus drivers and 132 truck drivers) participated in the revised questionnaire survey. All collected responses were entered into a SPSS worksheet and the data analysis was conducted using SPSS software 11.1. The exploratory factor analysis used in this study followed the principle component factoring rule and the varimax rotation method for factor extraction. The criteria for item selection were an Eigen value of 1.0 or greater, a communality score of .50 or greater, and no 'fence rider'property over the extracted factors.
RESULTS
Through Study 1, the consultant meeting, and Study 2, a general fatigue checklist was developed with a total of 3 factors and 11 items, and a driving fatigue checklist was developed with 2 factors and 10 items. The 3 factors of the general fatigue checklist were physical fatigue, psychological fatigue, and chronic tiredness. The two factors of the driving fatigue checklist were physical fatigue and perceptive and functional fatigue.
CONCLUSIONS
The primary contents of general fatigue were different from those of driving fatigue according to the two fatigue instrument factors developed in this study. The primary fatigue symptoms of the commercial driving population were identified as physical fatigue and perceptive and functional fatigue.

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Factors associated with different levels of daytime sleepiness among Korean construction drivers: a cross-sectional study
Yong Han Ahn, Sangeun Lee, Su Ryeon Kim, Jeeyeon Lim, So Jin Park, Sooyoung Kwon, Heejung Kim
BMC Public Health.2021;[Epub] CrossRef
Fatigue and poor sleep are associated with driving risk among Korean occupational drivers
Sooyoung Kwon, Heejung Kim, Gwang Suk Kim, Eunhee Cho
Journal of Transport & Health.2019; 14: 100572. CrossRef
Seafarers’ Quality of Life: Organizational Culture, Self-Efficacy, and Perceived Fatigue
Jae-hee Kim, Soong-nang Jang
International Journal of Environmental Research and Public Health.2018; 15(10): 2150. CrossRef
Economic Activities and Socioeconomic Status of Morbidly Obese Korean Adults
Hyun Ah Park, Jung Jin Cho
The Korean Journal of Obesity.2011; 20(4): 210. CrossRef

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Analysis of Influencing Factors on Female Hairdresser's Neuropsychiatric Symptoms Due to Chronic Organic Solvent Exposure: Sang A Kim, Eun Ju Kim, Woong Sub Park, Sang Hyuk Jung; Korean Journal of Occupational and Environmental Medicine 2002;14(1):13-22. Published online March 31, 2002; DOI: https://doi.org/10.35371/kjoem.2002.14.1.13

Abstract PDF

OBJECTIVES
This study was designed to examine the influencing factors on female hairdresser's neuropsychiatric symptoms due to chronic organic solvent exposure.
METHODS
We collected data from 143 female hairdressers employed in 75 hair salons selected by random sampling from the telephone directory of Gangnung City. Using multiple regression analysis we analyzed the influencing factors(i.e. ventilating fans, aircleaners, work duration, total time of exposure to solvents during hair-dyeing and permanent, etc.) on neuropsychiatric symptoms.
RESULTS
The neuropsychiatric symptom scores were significantly positively correlated with the total time of hair-dyeing work and work duration, and significantly negatively correlated with the glove wearing proportion. However, the total time of permanent work, ventilating fans and air-cleaners were not significantly correlated.
CONCLUSIONS
The results of this study suggest that for the prevention of neuropsychiatric symptoms due to chronic organic solvent exposure, more attention is required regarding hair-dyeing work than permanent work and to skin absorption rather than respiratory inhalation.

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Effect of Hairdresser's Depression and Job stress on Hairdresser’s Presenteeism
Mi-Jeung Ahn
Asian Journal of Beauty and Cosmetology.2020; 18(4): 493. CrossRef
Relationship between Occupational Stress and Depression in Hairdressers
Mi-Jeung Ahn, Sun-Ju Park
Asian Journal of Beauty and Cosmetology.2020; 18(4): 643. CrossRef
Physical and Psychosocial Risk Factors Affecting Mental Health and Presenteeism among South Korean Hairdressers
Jinhwa Lee, Bokim Lee
Korean Journal of Occupational Health Nursing.2016; 25(4): 290. CrossRef
The Effect of Work Characteristics on Dermatologic Symptoms in Hairdressers
Pil Kyun Jung, June-Hee Lee, Ji Hye Baek, Jungho Hwang, Jong-Uk Won, Inah Kim, Jaehoon Roh
Annals of Occupational and Environmental Medicine.2014;[Epub] CrossRef
Occupational Psychiatric Disorders in Korea
Kyeong-Sook Choi, Seong-Kyu Kang
Journal of Korean Medical Science.2010; 25(Suppl): S87. CrossRef

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Biological Monitorings of Workers Exposed to Toluene diisocyanate: Yeon Soon Ahn, Jae Hoon Roh, Chi Nyon Kim, Yun Jung Park, Sang Hyuk Jung; Korean Journal of Occupational and Environmental Medicine 1995;7(2):354-361. Published online October 31, 1995; DOI: https://doi.org/10.35371/kjoem.1995.7.2.354

Abstract PDF

Toluene diisocyanate (TDI) is widely used in the production of flexible polyurethane foams, as well as in the formulation of polyurethane paints and coatings. The commercial material is generally a mixture of 2,4- and 2,6-TDI, the predominant mix being 80% 2,4 and 20% 2,6-TDI. The 2,4-isomer is considerably more reactive than the 2,6-TDI at ambient temperatures due to steric factors involving the positions of the isocyanate groups relative to the ring methyl group. Because of this difference in the reactivities of the isomers, it seemed probable that there might be an increase in the amount of 2,6-TDI offgased relative to the 2,4-isomer. Therfore a relative enrichment of the 2,6-TDI has been found in industrial atmospheres. Toluene diamines, which are metabolites of TDI, in urine have a linear relation with exposure to TDI, so that urianry TDA could be used as a biological index of the exposure to TDI. This study was conducted to investigate the distribution of TDI isomer in industrial atmospheres and to propose proper biological monitoring methods by identifying the relationships between the environmental TDI exposure and concentration of TDA in urine. Concentrations of 2,4-TDI and 2,6-TDI in air were 4.38microgram/m3 and 25.43microgram/m3, respectively. The Threshold Limited Value of 40microgram/m3 was exceeded for the 2,6-TDI in about 46.8% (22samples) of the samples, while the 2,4-TDI was not at all exceeded. The ratio between 2,4-TDI and 2,6-TDI varied in air samples in the range, of 2.4%:97.6%-51.0%:49.0%. There was an enrichment of 2,6-TDI in air relative to the 2,4-TDL Concentrations of 2,4-TDA and 2,6-TDA in urine were 1.31microgram/g creatinine and 4.16microgram/g creatinine, respectively. The ratio between 2, 4-TDA and 2,6-TDA varied in urine samples in the range of 1.4%:98.6%-99.9%:0.1%. There was an enrichment of 2,6-TDA in urine relative to the 2,4-TDA. No relation between the concerations of TDA isomer in urine and concerations of TDI isomer in air was found. Above results of this study, workers were more exposed to the 2,6-TDI relative to the 2,4-TDI in industrial atmospheres. Therefore, the establishment of TLV for 2,6-TDI should be considered. Also, the further studies on biological monitorigs of workers exposed to TDI should be continued.

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Biological Monitoring of Workers Exposed to Diisocyanates using Urinary Diamines
Jong Seong Lee, Boowook Kim, Jungah Shin, JinEe Baek, Jae Hoon Shin, Ji-hye Kim
Journal of Korean Society of Occupational and Environmental Hygiene.2016; 26(2): 178. CrossRef

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