Skip to main content
padlock icon - secure page this page is secure

Free Content Objective and subjective measures of sleepiness, and their associations with on‐road driving events in shift workers

Download Article:

To assess the relationships between sleepiness and the incidence of adverse driving events in nurses commuting to and from night and rotating shifts, 27 rotating and permanent night shift‐working nurses were asked to complete daily sleep and duty logs, and wear wrist‐activity monitors for 2 weeks (369 driving sessions). During all commutes, ocular measures of drowsiness, including the Johns Drowsiness Scale score, were assessed using the Optalert™ system. Participants self‐reported their subjective sleepiness at the beginning and end of each drive, and any events that occurred during the drive. Rotating shift nurses reported higher levels of sleepiness compared with permanent night shift nurses. In both shift‐working groups, self‐reported sleepiness, drowsiness and drive events were significantly higher during commutes following night shifts compared with commutes before night shifts. Strong associations were found between objective drowsiness and increased odds of driving events during commutes following night shifts. Maximum total blink duration (mean = 7.96 s) during the drive and pre‐drive Karolinska Sleepiness Scale (mean = 5.0) were associated with greater incidence of sleep‐related events [OR, 5.35 (95% CI, 1.32, 21.60), OR, 1.69 (95% CI, 1.04, 2.73), respectively]. Inattention was strongly associated with a Johns Drowsiness Scale score equal to or above 4.5 [OR, 4.58 (95% CI, 1.26–16.69)]. Hazardous driving events were more likely to occur when drivers had been awake for 16 h or more [OR, 4.50 (95% CI, 1.81, 11.16)]. Under real‐world driving conditions, shift‐working nurses experience high levels of drowsiness as indicated by ocular measures, which are associated with impaired driving performance following night shift work.
No References
No Citations
No Supplementary Data
No Article Media
No Metrics

Document Type: Research Article

Affiliations: 1: School of Psychology and Psychiatry, Monash University, Clayton, Vic., Australia 2: Institute for Breathing and Sleep, Austin Hospital, Heidelberg, Vic., Australia 3: Monash University Accident Research Centre, Monash University, Clayton, Vic., Australia

Publication date: February 1, 2013

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more