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Related Experiment Videos

Shift work and cognitive aging: a longitudinal study.

Kathleen Bokenberger1, Peter Ström, Anna K Dahl Aslan

  • 1Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, 171 77 Stockholm, Sweden. kathleen.bokenberger@ki.se.

Scandinavian Journal of Work, Environment & Health
|April 1, 2017
PubMed
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Shift work did not impact cognitive aging in older adults. A study found no differences in cognitive performance decline between shift workers and day workers over time.

Area of Science:

  • Gerontology
  • Occupational Health
  • Cognitive Neuroscience

Background:

  • Previous research on shift work and cognitive function in older adults shows inconsistent results.
  • Understanding the long-term effects of occupational schedules on cognitive aging is crucial for public health.

Purpose of the Study:

  • To investigate the association between shift-work experience and cognitive performance changes around retirement age.
  • To analyze the impact of different shift work types (any-type, night work) on cognitive trajectories.

Main Methods:

  • Longitudinal study of 595 cognitively healthy older adults from a Swedish population sample.
  • Self-reported shift work history and up to 9 waves of cognitive assessments (verbal, spatial, memory, processing speed, general ability) over approximately 17.6 years.

Related Experiment Videos

  • Latent growth curve modeling used to analyze cognitive change, with consideration for education and early adult cognitive scores.

    • Main Results:

    • No significant main effects of any-type or night shift work on cognitive performance or its rate of change were found.
    • An interaction effect indicated lower-educated shift workers performed better at retirement, but sensitivity analyses suggested this was due to selection bias.
    • Lower-educated day workers had poorer early adult cognition, potentially selecting jobs with higher cognitive demands.

    Conclusions:

    • Shift work history does not appear to influence late-life cognitive aging trajectories.
    • Observed cognitive differences at retirement were likely attributable to pre-existing cognitive abilities and job selection rather than the work schedule itself.