Annals of Occupational and Environmental Medicine

Original Article

Factors Associated with Quality on Sleep of Subway Workers by Shift-Work: Min Gi Kim, Won Chul Lee, Young Min Lee, Jae Hong Ryoo, Hawn Cheol Kim, Seung Won Yoo, Kyung Han Nam; Korean Journal of Occupational and Environmental Medicine 2008;20(4):326-334. Published online December 31, 2008; DOI: https://doi.org/10.35371/kjoem.2008.20.4.326

BACKGROUND
The sleep quality of subway drivers who work in the dark underground with an rotating shift system is generally poor, which can degrade the quality of a worker's life. This study examined the relationship between the sleep quality of subway worker and shift work by comparing three shift systems (rotating shift system, a three day shift system, and no-shift system).
METHOD
Questionnaires including The short form of the Korean Occupational Stress Scale (KOSS), Pittsburgh Sleep Questionnaire (PSQI), the worker's age, gender, job type, accident, near miss and shift system were given to a total of 1010 workers. The results of 759 qualified questionnaires (75.15 %) were analyzed using the SPSS (ver 12.0) program.
RESULT
The highest level of job stress was found among those working a rotating shift system followed by three shift system and no-shift system. The mean sleep quality score in the rotating shift workers was 5.1 (SD+/-3.2), which was greater than the sleep symptom score (5). 34.8% of rotating shift workers suffered from sleep symptoms. The sleep quality score by shift-work was significantly different. High job demand, strong external locus control, the experience of a near miss or an accident in the workplace during previous year has an adverse affect on the sleep quality. The sleep quality improved in case of a change into a no-shift system or a strong internal locus control.
CONCLUSION
A rotating shift system is more harmful to the quality of sleep in subway workers than a 3 shift system or no-shift system. In addition, job stress, personality, near miss and the experience of an accident affect the sleep quality of subway workers.

Citations

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Original Article

Job Stressors in Subway Workers and Firemen: Seok Hwan Yoon, Sook Jung Choi, Dong Hoon Shin, In Sung Chung, Jung Sook Ha; Korean Journal of Occupational and Environmental Medicine 2007;19(3):179-186. Published online September 30, 2007; DOI: https://doi.org/10.35371/kjoem.2007.19.3.179

Abstract PDF

OBJECTIVES
To determine the job stress factors of subway workers and firemen and to develope appropriate stress management systems for the works places.
METHODS
The study subjects comprised 1,826 male subway workers and 538 male firemen residing in Daegu metropolitan city. The Korean Occupational Stress Scale (KOSS) questionnaire was used.
RESULTS
The median values of the study subjects were lower than the reference values. The categories of physical environment and insufficient job control were more stressful to firemen while the organization system category was stressful to both subway workers and firemen (p<0.05). There was no statistical difference in the stress factor of the interpersonal conflict category. Among the firemen, the physical environment category was more stressful to field work department workers than to desk workers (p<0.05).
CONCLUSION
The study results suggested that interpersonal conflict and organization system categories are stressful to male subway workers and firemen. Especially, effective control of firemen's physical environment stress factor is needed.

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Original Article

Health Behavior Practices and Needs for Health Promotion Program According to Shift Work Pattern in Subway Workers: Suk Kyong Choi, Kang Sook Lee, Joung Woon Lee, Jung Wan Koo, Chung Yill Park; Korean Journal of Occupational and Environmental Medicine 2003;15(1):37-51. Published online March 31, 2003; DOI: https://doi.org/10.35371/kjoem.2003.15.1.37

Abstract PDF

OBJECTIVES
To determine the health behavior practices and needs for health promotion in shift work pattern in subway workers.
METHODS
Among 789 male subway workers divided into four groups, 191 day time workers, 187 station service men (3 groups, 2 turns), 204 rolling stock inspectors (3 groups, 2 turns) and 207 train operators (8 groups, 5 turns), we surveyed the health behavior and needs for health promotion by questionnaire.
RESULTS
For obesity, blood pressure and total cholesterol, day time workers had the highest levels, while train operators had higher diseases of the liver and stomach than others. The station service men had the highest smoking rate and daily smoking amount. More than 80% of the respondents consumed alcohol, and the drinking amount was highest among the day time workers and the 8/5 shift train operators. Eighty-two percent of the station service men had irregular eating habits and 17.7% did not have any breakfast. In health promotion activities, exercise and restriction of one's favorite(smoking or drinking) were most preferred in the four groups of respondents. The priority of needs and participation for health promotion program was exercise programs, followed by stress management, cancer prevention program, weight control program, anti-smoking campaign, high blood pressure control program, and abstinence/moderation in drinking.
CONCLUSION
As the health behavior practices differed relative to shift work patterns, it was suggested that a comprehensive health promotion program according to shift work pattern should be planned and implemented among subway workers.

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