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Title: Individual vulnerability to insomnia, excessive sleepiness and shift work disorder amongst healthcare shift workers. A systematic review.
Austin Authors: Booker, Lauren A ;Magee, Michelle;Rajaratnam, Shantha M W;Sletten, Tracey L;Howard, Mark E 
Affiliation: Institute for Breathing and Sleep, Austin Health, Heidelberg, Victoria, Australia
School of Psychological Sciences and Monash Institute of Cognitive and Clinical Neurosciences, Monash University, Melbourne, Victoria, Australia
Cooperative Research Centre for Alertness, Safety and Productivity, Melbourne, Victoria, Australia
Department of Medicine, University of Melbourne, Parkville, Victoria, Australia
Issue Date: 27-Mar-2018 2018
Publication information: Sleep medicine reviews 2018; online first: 27 March
Abstract: Shift workers often experience reduced sleep quality, duration and/or excessive sleepiness due to the imposed conflict between work and their circadian system. About 20-30% of shift workers experience prominent insomnia symptoms and excessive daytime sleepiness consistent with the circadian rhythm sleep disorder known as shift work disorder. Individual factors may influence this vulnerability to shift work disorder or sleep-related impairment associated with shift work. This paper was registered with Prospero and was conducted using recommended standards for systematic reviews and meta-analyses. Published literature that measured sleep-related impairment associated with shift work including reduced sleep quality and duration and increased daytime sleepiness amongst healthcare shift workers and explored characteristics associated with individual variability were reviewed. Fifty-eight studies were included. Older age, morning-type, circadian flexibility, being married or having children, increased caffeine intake, higher scores on neuroticism and lower on hardiness were related to a higher risk of sleep-related impairment in response to shift work, whereas physical activity was a protective factor. The review highlights the diverse range of measurement tools used to evaluate the impact of shift work on sleep. Use of standardised and validated tools would enable cross-study comparisons. Longitudinal studies are required to establish causal relationships between individual factors and the development of shift work disorder.
DOI: 10.1016/j.smrv.2018.03.005
PubMed URL: 29680177
Type: Journal Article
Subjects: Circadian rhythm
Shift work disorder
Appears in Collections:Journal articles

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