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Shift-specific associations between age, chronotype and sleep duration.

Michael Schuster1, Christoph Oberlinner1, Matthias Claus1

  • 1a Corporate Health Management, BASF SE , Ludwigshafen am Rhein , Germany.

Chronobiology International
|March 19, 2019
PubMed
Summary
This summary is machine-generated.

Older age is linked to earlier chronotypes and shorter sleep duration for both day and rotating shift workers. Rotating shift work shifts chronotypes later and increases sleep duration, with age amplifying these differences.

Keywords:
Chronotype – demographic change – MCTQ – shift work – sleep duration – sleep timing

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Area of Science:

  • Occupational Health
  • Chronobiology
  • Sleep Medicine

Background:

  • Age-related changes in circadian physiology can impact sleep patterns.
  • Work schedules, including day and rotating shift work, interact with individual chronotypes.
  • Understanding these interactions is crucial for employee well-being and productivity.

Purpose of the Study:

  • To investigate the association between age, chronotype, and sleep duration.
  • To compare these associations in day workers versus rotating shift workers.
  • To explore potential modifications of these associations by working time systems.

Main Methods:

  • A cross-sectional study involving 4,040 employees from a German chemical company.
  • Utilized the Munich ChronoType Questionnaire (MCTQ) to assess sleep patterns.
  • Linear regression analyses were employed to examine associations and effect modifications.

Main Results:

  • Older age correlated with earlier chronotype and reduced sleep duration in both work groups (p < 0.001).
  • Rotating shift workers exhibited later chronotypes and longer sleep duration compared to day workers.
  • Age amplified chronotype differences and reduced sleep duration differences between work groups (pinteraction < 0.005).

Conclusions:

  • Age-related shifts in circadian rhythms and work schedules significantly influence chronotype and sleep duration.
  • Older rotating shift workers with early chronotypes may face challenges with night shifts.
  • Flexible, chronotype-adapted work hours and sleep education are recommended, especially for older employees.