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Updated: May 14, 2026

Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments
08:36

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Published on: August 8, 2019

Shift work disorder in a random population sample--prevalence and comorbidities.

Lee Di Milia1, Siri Waage, Ståle Pallesen

  • 1School of Management and the Institute for Health and Social Science Research, Central Queensland University, Rockhampton, Queensland, Australia. v.dimilia@cqu.edu.au

Plos One
|February 2, 2013
PubMed
Summary

Shift work disorder (SWD) affects over 30% of night workers, with severe SWD impacting over 9%. Key factors include night work, insufficient sleep, and languidity, highlighting the need to address SWD severity.

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Published on: November 21, 2013

Area of Science:

  • Sleep Medicine
  • Occupational Health
  • Psychology

Background:

  • Shift work disorder (SWD) prevalence in the general population is understudied.
  • Existing research often treats SWD as a binary condition, neglecting its severity.
  • This study introduces the concept of severe shift work disorder (SSWD) to better understand its impact.

Purpose of the Study:

  • To investigate the prevalence of SWD and SSWD in a community sample.
  • To identify factors associated with SWD and SSWD.
  • To explore the impact of SWD severity on sleep duration and other health aspects.

Main Methods:

  • A community-based sample of 1163 participants was recruited using random digit dialling.
  • Participants completed questionnaires on work, health, and individual differences.
  • SWD was identified using criteria from the International Classification for Sleep Disorders, and SSWD was defined by interference with life aspects.

Main Results:

  • The prevalence of SWD was 32.1% in night workers and 10.1% in day workers.
  • SSWD prevalence was 9.1% in night workers and 1.3% in day workers.
  • SWD and SSWD were significantly associated with night work, short sleep duration (≤6h), and languidity. SSWD was also linked to hypertension and reduced sleep duration (0.80h less).

Conclusions:

  • SWD is prevalent in the general community, particularly among night workers.
  • Considering the severity of SWD is crucial for understanding its impact.
  • Night work, insufficient sleep, and languidity are significant risk factors for both SWD and SSWD, necessitating targeted interventions.