• The Journal of the Korea Contents Association
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• v.17 no.6
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• pp.132-141
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• 2017

The factors influencing nicotine dependence of smoking shift workers (154 samples), working in manufacturing industry, were investigated. 23.4% of the sample showed moderate nicotine dependence while 14.3% did severe dependence. Nicotine dependence showed statistically significant difference with respect to sex, disease, and health condition and was positively correlated with occupational stress. Occupational stress, sex, and disease were identified as the influential factors, explaining 43.9%, and should be the basis for intervention to reduce nicotine dependence.

• Nuclear industry
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• v.10 no.12 s.94
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• pp.72-76
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• 1990

• Sleep Medicine and Psychophysiology
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• v.7 no.2
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• pp.96-101
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• 2000

Objectives: Through comparing sleep variables and autonomic activities among three shifts in shift workers, the authors intended to clarify which shift is most tolerable and to identify the characteristics of their psychological and physical problems. This study is also expected to help shift workers to adapt themselves to their work more effectively. Methods: Fifty one shift workers took part in this study. They were working in a rapidly rotating system in which they worked for 3 days in one shift with one day off between each shift. Based on a sleep diary, sleep latency (SL), sleep period time (SPT), and number of wake after sleep onset (NWASO) were estimated and compared among the three shifts. In assessing sleepiness, Epworth sleepiness scale (ESS) and visual analogue scale (VAS) were used. To evaluate mood states among the three shifts, profile of mood states (POMS) was administered. Heart rate variability (HRV), and the level of adrenaline and noradrenaline were measured to assess autonomic activities. HRV included low frequency power (LF), high frequency power (HF), and LF/HF. Results: SPT was significantly lengthened during the evening shift and SL was shortened during the night shift. The workers showed a drop in alertness at wake-up during morning shift and a drop in alertness at work during night shift. During night shift the subjects complained of physical fatigue and cognitive decline. Comparison of HRV showed that parasympathetic activity was most prominent during the evening shift. Secretion of adrenaline and noradrenaline decreased during the evening shift, though statistically not significant. Conclusion: We found that the evening shift was most tolerable among the three shifts. It is recommended that morning light exposure be done during the morning shift and nocturnal light exposure during the night shift.

• 월간산업보건
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• s.116
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• pp.50-51
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• 1997

• Proceedings of the ESK Conference
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• 1998.04a
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• pp.137-142
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• 1998

본 조사는 1996년 9월무터 12월에 걸쳐 마산.창원 공단지역 사업장에서 근무하는 정상근무 근로자 1,640명과 교대근무 근로자 1,360명을 대상으로 General Health Questionnaire(GHQ-30)을 이용하여 정신의 학적 특징 및 점수 분포를 검토하였다. 전체 문항에 대한 상관관계와 Cronbach .alpha. 계수에 의한 내적 일관성(Internal consistency)은 정상근무, 교대근무 모두 만족할 만한 수준이였고, Varimax 회전에 의한 주요인 분석으로부터 추출된 GHQ-30의 정신의학적 특징은 정상근무가 5개, 교대근무는 6개 요인이 추출되 었다. 정상근무에서 추출된 5개의 요인은 '심리적 요인', '신체적 요인', '사회적 요인', '스트레스 요인', '자신감 요인'이였고, 교대근무는 상기의 5개 요인 외의 '직무 요인'이 추출되었다. 상기의 공통된 5개 요인 구조는 대체로 비슷하였다. GHQ-30의 점수 분포는 정상.교대근무보다 왼쪽으로 치우치는 경향을 보였다. (Skewness: 정상근무=0.42, 교대근무=0.27). 인구동태학적 요인에 따른 감정적 혼란의 정도는 교대근무가 정상근무보다 높았으며, 정상.교대근무 모두 연령별, 자녀의 수, 결혼 유무에 대해서 유의한 차이를 보였으며, 각각 20대이하, 무자녀, 이혼.미혼의 집단에 있어서감정적 혼란이 큰 것으로 나타났다.

• Journal of Nutrition and Health
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• v.51 no.6
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• pp.567-579
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• 2018

Purpose: This study examined the mediation effects of dietary habits, nutrient intake, daily life in the relationship between the working hours of Korean shift workers and metabolic syndrome. Methods: Data were collected from the sixth (2013-2015) Korea National Health and Nutrition Examination Survey (KNHANES). The stochastic regression imputation was used to fill missing data. Statistical analysis was performed in Korean shift workers with metabolic syndrome using the SPSS 24 program for Windows and a structural equation model (SEM) using an analysis of moment structure (AMOS) 21.0 package. Results: The model fitted the data well in terms of the goodness of fit index (GFI) = 0.939, root mean square error of approximation (RMSEA) = 0.025, normed fit index (NFI) = 0.917, Tucker-Lewis index (TLI) = 0.984, comparative fit index (CFI) = 0.987, and adjusted goodness of fit index (AGFI) = 0.915. Specific mediation effect of dietary habits (p = 0.023) was statistically significant in the impact of the working hours of shift workers on nutrient intake, and specific mediation effect of daily life (p = 0.019) was statistically significant in the impact of the working hours of shift workers on metabolic syndrome. On the other hand, the dietary habits, nutrient intake and daily life had no significant multiple mediator effects on the working hours of shift workers with metabolic syndrome. Conclusion: The appropriate model suggests that working hours have direct effect on the daily life, which has the mediation effect on the risk of metabolic syndrome in shift workers.

• Sleep Medicine and Psychophysiology
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• v.6 no.1
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• pp.61-67
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• 1999

Objectives: The aim of this study was to examine the impact of shift work on psychological, physical and social adjustment in nurses. Methods: Two hundred ninety-nine female nurses(179 shift worker, 120 non-shift worker) filled out a questionnaire, which consisted of fifty-six items including demographic characteristics. Subjective ratings of psychological, physical, social and sleeprelated distresses were assessed with a visual analogue scale(100mm). Results: Shift work exerted significantly negative impacts on all psychological, physical, social and sleep-related variables of the shift work nurses. The subjective perception about psychological and physical health of shift work nurses was significantly negative as compared to that of non-shift work nurses. Shift work nurses complained of more shift work related social dysfunction and limited social activity. Shift work nurses were also suffering from significant sleep difficulties as compared to non-shift work nurses. Conclusions: This study suggests that shift work can exert a negative impact on psychological and physical health of nurses as it can cause disturbances of the normal circadian rhythms of the psychophysiological functions, beginning with the sleep-wake cycle. Shift work can also cause difficulties in maintaining the usual relationships both at family and social levels. These results may suggest that we need appropriate coping strategies to overcome adverse effects of shift work.

• 월간산업보건
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• s.290
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• pp.45-52
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• 2012

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.11
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• pp.6782-6792
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• 2014

This study examined the effects of the symptoms of musculoskeletal disorder and the burden of the body on work stress in a university hospital workers. The research surveyed 679 subjects. The relevant factors affecting the job stress were found to be female, young people age group, unmarried, shift work, work more than 8 hours, short experience workers. The work stress was significantly higher in the non-smoker (p=0.000), regular exercise/sports(p=0.022) and non-drinking(p=0.038) groups. In addition, the mental fatigue, presence of musculoskeletal symptoms, fatigue level, and marital status increase the risk of the work stress. The results showed that the burden of the body and musculoskeletal disorders are related interactively with each other.

• Korean Journal of Psychosomatic Medicine
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• v.29 no.2
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• pp.111-120
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• 2021

Objectives : Shift work has been known to cause various health problems by making it difficult for humans to adapt to their natural circadian rhythms. In particular, shift workers tend to complain of sleep difficulties associated with work schedules, and sometimes use alcohol as a self-medication to induce sleep. To date, no clear mechanism has been identified regarding the link between shift work and sleep, between shift work and drinking. This study aims to confirm the relationship between shift work and sleep, and to analyze whether the change in sleep caused by shift work causes drinking. Methods : This study included 11360 people (5704 men and 5656 women) among the Korean National Health and Nutrition Survey data in 2014, 2016 and 2018. The work type between 6am-6pm was defined as day work, and other work types were defined as shift work. Using logistic regression analysis, the relationship between shift work and sleep quality, shift work and high risk drinking, drinking amount at 1 time, drinking frequency were analyzed. In addition, we analyzed whether sleep mediates the relationship between shift work and drinking using mediated analysis. Results : Shift work showed a significant negative relationship with sleep quality in men and women (male OR=1.37, 95% CI 1.11-1.70, female OR=1.26, 95% CI=1.05-1.50). There was no significant relationship between shift work and alcohol in the case of men, but in the case of women, there was a significant positive relationship between shift work and the number of alcohol consumption (OR=1.34, 95% CI=1.04-1.72). When mediation analysis was conducted, it was found that women's sleep quality partially mediated the relationship between shift work and the frequency of drinking. Conclusions : The results of this study suggest that shift work causes sleep difficulties, and in the case of women, drinking can be induced through the partial mediating effect of sleep. Considering that women are more likely to choose drinking as a coping method for sleep problems, more active interventions for female shift workers are needed.