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Ageing shift workers' sleep and working-hour characteristics after implementing ergonomic shift-scheduling rules.

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Implementing ergonomic shift schedules improved sleep for older healthcare workers by reducing short shifts and weekend work. This intervention buffered against sleep problems, promoting longer sleep duration and fewer sleep difficulties.

Keywords:
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Area of Science:

  • Occupational Health
  • Sleep Science
  • Ergonomics

Background:

  • Shift work poses risks to older workers' health and sleep.
  • Ergonomic shift scheduling aims to mitigate these risks.
  • Previous research on scheduling interventions for aging workers is limited.

Purpose of the Study:

  • To investigate the impact of binding ergonomic shift-scheduling rules on working hours and sleep in older social and healthcare employees (aged ≥45 years).

Main Methods:

  • A quasi-experimental design comparing an intervention group (n=253) with a control group (n=1,234).
  • Data collected via surveys and objective working-hour records (baseline 2007/2008, follow-up 2012).
  • Statistical analyses included general linear models for working hours and generalized logit models for sleep outcomes.

Main Results:

  • The intervention group showed a greater decrease in short shift intervals (<11 hr) and weekend work compared to the control group.
  • Intervention participants had significantly higher odds of long sleep (≥9 hr) and lower odds of short sleep (<6 hr).
  • The intervention group reported fewer sleep difficulties, including trouble falling/staying asleep and non-restorative sleep.

Conclusions:

  • Implementation of ergonomic shift-scheduling rules led to modest improvements in objective working hours for older employees.
  • The intervention effectively buffered against the worsening of sleep quality and duration.
  • Ergonomic scheduling demonstrates a protective effect on sleep for aging shift workers in healthcare settings.