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Natural Light Exposure, Sleep and Depression among Day Workers and Shiftworkers at Arctic and Equatorial Latitudes

Marqueze, EC, Vasconcelos, S, Garefelt, J, Skene, DJ, Moreno, CR and Lowden, A (2015) Natural Light Exposure, Sleep and Depression among Day Workers and Shiftworkers at Arctic and Equatorial Latitudes PLOS ONE, 10 (4), UNSP e.

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Abstract

OBJECTIVES: This study aimed to investigate the relationship between individual natural light exposure, sleep need, and depression at two latitudes, one extreme with a few hours of light per day during winter, and the other with equal hours of light and darkness throughout the year. METHODS: This cross-sectional study included a sample of Brazilian workers (Equatorial, n = 488 workers) and a Swedish sample (Arctic, n = 1,273). RESULTS: The reported mean total natural light exposure per 4-week cycle differed significantly between the Equatorial and Arctic regions. However, shiftworkers from both sites reported similar hours of natural light exposure. Short light exposure was a predictor for insufficient sleep. CONCLUSION: Reduced exposure to natural light appears to increase the perception of obtaining insufficient sleep. Arctic workers were more prone to develop depression than Equatorial workers.

Item Type: Article
Divisions : Faculty of Health and Medical Sciences > School of Biosciences and Medicine > Department of Biochemical Sciences
Authors :
AuthorsEmailORCID
Marqueze, ECUNSPECIFIEDUNSPECIFIED
Vasconcelos, SUNSPECIFIEDUNSPECIFIED
Garefelt, JUNSPECIFIEDUNSPECIFIED
Skene, DJUNSPECIFIEDUNSPECIFIED
Moreno, CRUNSPECIFIEDUNSPECIFIED
Lowden, AUNSPECIFIEDUNSPECIFIED
Date : 15 April 2015
Identification Number : 10.1371/journal.pone.0122078
Uncontrolled Keywords : Science & Technology, Multidisciplinary Sciences, Science & Technology - Other Topics, SEASONAL AFFECTIVE-DISORDER, LOW-BACK-PAIN, BRIGHT LIGHT, NIGHT WORK, CIRCADIAN-RHYTHMS, MOOD, PREVALENCE, QUALITY, IMPACT, CLOCK
Related URLs :
Additional Information : © 2015 Marqueze et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Depositing User : Symplectic Elements
Date Deposited : 27 Oct 2015 15:50
Last Modified : 27 Oct 2015 15:50
URI: http://epubs.surrey.ac.uk/id/eprint/808675

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