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

Ftouni, S., Sletten, T.L., Howard, M., Anderson, C., Lenné, M.G., Lockley, S.W. and Rajaratnam, S.M.W. (2013) Objective and subjective measures of sleepiness, and their associations with on-road driving events in shift workers Journal of Sleep Research, 22 (1). pp. 58-69.

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Abstract

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 2weeks (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=7.96s) 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 16h 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. © 2012 European Sleep Research Society.

Item Type: Article
Authors :
NameEmailORCID
Ftouni, S.
Sletten, T.L.
Howard, M.
Anderson, C.
Lenné, M.G.
Lockley, S.W.s.lockley@surrey.ac.uk
Rajaratnam, S.M.W.
Date : 2013
DOI : 10.1111/j.1365-2869.2012.01038.x
Uncontrolled Keywords : Accidents, Drowsy driving, Nurses, Safety, Shift work, Sleepiness, actimetry, adult, article, clinical article, disease association, driving ability, drowsiness, eye movement, female, human, Johns Drowsiness Scale score, male, monitor, nurse, oculography, priority journal, questionnaire, scoring system, self report, shift worker, sleep, somnolence, Actigraphy, Adult, Automobile Driving, Eye Movement Measurements, Female, Humans, Male, Middle Aged, Nurses, Self Report, Sleep Stages, Wakefulness, Work Schedule Tolerance
Depositing User : Clive Harris
Date Deposited : 17 Jun 2020 01:29
Last Modified : 17 Jun 2020 01:29
URI: http://epubs.surrey.ac.uk/id/eprint/857891

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