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Related Experiment Videos

Shift work and mortality.

Torbjörn Akerstedt1, Göran Kecklund, Sven-Erik Johansson

  • 1National Institute for Psychosocial factors and Health and Department of Public Health Sciences, Karolinska Institute, Stockholm, Sweden. torbjorn.akerstedt@ipm.ki.se

Chronobiology International
|January 14, 2005
PubMed
Summary

Shift work may increase mortality risk, particularly for female white-collar workers. This study found no increased mortality for blue-collar shift workers compared to day workers.

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Area of Science:

  • Occupational Health
  • Epidemiology
  • Public Health

Background:

  • Previous research links shift work to adverse health outcomes.
  • The relationship between shift work and mortality requires further investigation.

Purpose of the Study:

  • To investigate shift work as a predictor of mortality.
  • To analyze mortality differences between shift and day workers across different demographics.

Main Methods:

  • A longitudinal study of 22,411 Swedish individuals (1979-2000).
  • Data collected via annual phone interviews.
  • Cox regression analysis adjusted for age, stress, workload, pre-existing conditions, and smoking.

Main Results:

  • Shift work was associated with a significantly increased mortality risk for female white-collar workers (Hazard Ratio: 2.61).
  • No significant association between shift work and mortality was found for male workers or blue-collar workers of either sex.

Conclusions:

  • Shift work is not universally linked to increased mortality.
  • Female white-collar shift workers face a higher risk of death compared to their day-working counterparts.

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