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Sleepiness and driving events in shift workers: the impact of circadian and homeostatic factors
Sleepiness and driving problems in shift workers linked to body clock and sleep pressure
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Abstract
Subjective and objective sleepiness significantly increased following night shifts in shift workers.
- Driving events related to sleepiness rose after night shifts compared to pre-shift levels.
- The highest rates of subjective sleepiness and driving-related incidents occurred during post-night shift commutes.
- Sleep-related driving events peaked following the first night shift, while inattention-related events were more common after consecutive night shifts.
- Driving events increased after more than 16 hours of wakefulness.
- Subjective measures of sleepiness were highest during commutes within ±3 hours of peak melatonin levels, particularly when wakefulness was prolonged.
- An interaction between the body’s internal clock and wakefulness duration was noted, affecting sleepiness during drives.
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