Annals of Occupational and Environmental Medicine

  • Volume 34
  • /
  • Pages.27.1-27.12
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  • 2022
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  • 1225-3618(pISSN)
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  • 2052-4374(eISSN)
The Korean Society of Occupational & Environmental Medicine (대한직업환경의학회)
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Association between sleep quality and type of shift work in Korean firefighters

  • Hyun-Jeong Oh (Department of Occupational and Environmental Medicine, Wonju Severance Christian Hospital, Yonsei University Wonju College of Medicine) ;
  • Chang Sun Sim (Department of Occupational and Environmental Medicine, Ulsan University Hospital, University of Ulsan College of Medicine) ;
  • Tae-Won Jang (Department of Occupational and Environmental Medicine, Hanyang University College of Medicine) ;
  • Yeon Soon Ahn (Department of Preventive Medicine, Yonsei University Wonju College of Medicine) ;
  • Kyoung Sook Jeong (Department of Occupational and Environmental Medicine, Wonju Severance Christian Hospital, Yonsei University Wonju College of Medicine)
  • Received : 2022.05.05
  • Accepted : 2022.09.16
  • Published : 2022.12.31
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Abstract

Background: Shift work that interferes with normal sleep patterns, is known to be a cause of sleep disturbance and has been studied through various occupational groups. However, it is not known which shift type is better for sleep health. Methods: This study included 568 firefighters. Sleep quality was evaluated using Pittsburgh Sleep Quality Index. Sleep quality was categorized into 2 groups; good quality (≤ 5 points) and poor quality (≥ 6 points). Demographic variables, depression, anxiety, type of shift, and job were collected by self-reported questionnaires. The χ2 test, t-test, and multiple logistic regression analysis were used to evaluate the effect of shift type on the sleep quality of firefighters. Results: Three hundred thirty-seven firefighters (59.3%) have poor sleep quality. Compared to day workers, the odds ratios (ORs) of poor sleep quality were 2.169 (95% confidence interval: 1.137-4.134) in 6-day cycle, 2.161 (1.150-4.062) in 9-day cycle, 1.805 (1.087-2.997) in 21-day cycle, and 1.485 (0.718-3.069) in 3-day cycle. The ORs of poor sleep quality were 1.697(1.021-2.823) in fire suppression and 2.325 (1.213-4.455) in emergency medical service compared to administration. Conclusions: All shift work type except for the 3-day cycle was associated with poor sleep quality compared to day work.

Keywords

Acknowledgement

The authors of this paper would like to thank all firefighters who participated in this study.

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