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Work time control, sleep & accident risk: A prospective cohort study.

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Area of Science:

  • Occupational Health
  • Sleep Science
  • Sociology

Background:

  • Work time control (WTC) is linked to improved sleep, but its direct impact on accident risk requires further investigation.
  • Understanding the mechanisms, such as sleep disturbance, is crucial for developing effective workplace safety interventions.

Purpose of the Study:

  • To investigate the association between work time control and subsequent accident risk.
  • To examine the mediating role of sleep disturbance and short sleep frequency in this relationship.

Main Methods:

  • Utilized data from a nationally representative Swedish survey (N=4840 in 2010, N=4337 in 2012).
  • Employed logistic regressions to analyze WTC (overall and sub-dimensions) as predictors of accidents.
  • Assessed sleep disturbance and short sleep frequency as mediators, adjusting for covariates like age, sex, work hours, and job control.

Main Results:

  • Overall WTC was inversely associated with accident risk in both survey waves.
  • Control over Time-off (CoT), a sub-dimension of WTC, significantly predicted fewer accidents.
  • Sleep disturbance showed a small mediating effect, but short sleep frequency did not.

Conclusions:

  • Work time control, particularly control over time-off, is a significant factor in reducing subsequent accident risk.
  • Sleep disturbance plays a minor role in the mechanism linking WTC to accident prevention.
  • Further research should explore other potential mediators beyond sleep quality.