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Related Experiment Videos

Shiftwork experience, age and cognitive performance.

Isabelle Rouch1, Pascal Wild, David Ansiau

  • 1Department of Epidemiology, French National Research and Safety Institute for the Prevention of Occupational Accidents and Diseases, Vandoeuvre, France. isabelle.rouch@chu-st.etienne.fr

Ergonomics
|October 29, 2005
PubMed
Summary
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Long-term shift-work negatively impacts cognitive functions like memory and speed. Some cognitive deficits may improve after stopping shift-work, suggesting potential reversibility.

Area of Science:

  • Occupational Health
  • Neuroscience
  • Chronobiology

Background:

  • Circadian rhythm disruption from shift-work is linked to short-term cognitive issues.
  • Long-term cognitive effects of chronic sleep deprivation due to shift-work remain under-researched.

Purpose of the Study:

  • To assess the long-term impact of shift-work on verbal memory and speed.
  • To investigate cognitive performance in a large cohort of workers with varied shift-work exposure.

Main Methods:

  • Cross-sectional study of 3,237 workers (aged 32, 42, 52, 62) from the VISAT cohort.
  • Data collection via questionnaires on work hours, shift-work, and sleep disorders.
  • Cognitive abilities evaluated using standardized neuropsychological tests.

Related Experiment Videos

Main Results:

  • Current male shift-workers exhibited lower cognitive performance compared to non-shift workers.
  • Memory performance decreased with longer durations of shift-work exposure.
  • Former shift-workers who ceased work over 4 years prior showed improved cognitive performance, indicating potential reversibility.

Conclusions:

  • Long-term shift-work exposure is associated with impaired cognitive functioning.
  • Neuropsychological performance declines with increased duration of shift-work.
  • Shift-work's cognitive effects may be partially reversible after cessation.