Irregular work hours and the risk of sleep disturbance among korean service workers required to suppress emotion

Sehyun Yun, Minsuk Kim, Won Tae Lee, Jin Ha Yoon, Jong Uk Won

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Although a necessity in a modern society, irregular work schedule can lead to sleep prob-lems. We investigated the effect of work schedule irregularity on sleep disturbance of 17,846 Korean service workers using the fifth Korean Working Conditions Survey. The odds ratio (OR) and 95% confidence interval (CI) for sleep disturbance occurrence were calculated through a multiple logistic regression model. The adjusted ORs for moderate and severe sleep disturbances for those with irregular work hours were 2.11 (95% CI 1.90–2.33) and 3.10 (95% CI 2.62–3.66), respectively. Work schedule irregularity and emotion suppression at work showed synergistic effect on both moderate and severe sleep disturbances. Sleep disturbances can lead to brain function deterioration and work-related injuries; therefore, appropriate measures should be addressed for the vulnerable population.

Original languageEnglish
Article number1517
Pages (from-to)1-12
Number of pages12
JournalInternational journal of environmental research and public health
Issue number4
Publication statusPublished - 2021 Feb 2

Bibliographical note

Funding Information:
The authors would like to thank the Safety and Health Policy Research Department (Occupational Safety and Health Research Institute, OSHRI) for offering raw data of the KWCS (Korean Working Conditions Survey). This paper’s contents are solely the responsibility of the authors, and do not necessarily represent the official views of the OSHRI.

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.

All Science Journal Classification (ASJC) codes

  • Pollution
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis


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