Sleep patterns in Amazon rubber tappers with and without electric light at home.

Moreno, CR, Vasconcelos, S, Marqueze, EC, Lowden, A, Middleton, B, Fischer, FM, Louzada, FM and Skene, DJ (2015) Sleep patterns in Amazon rubber tappers with and without electric light at home. SCIENTIFIC REPORTS, 5.

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Abstract

Today's modern society is exposed to artificial electric lighting in addition to the natural light-dark cycle. Studies assessing the impact of electric light exposure on sleep and its relation to work hours are rare due to the ubiquitous presence of electricity. Here we report a unique study conducted in two phases in a homogenous group of rubber tappers living and working in a remote area of the Amazon forest, comparing those living without electric light (n = 243 in first phase; n = 25 in second phase) to those with electric light at home (n = 97 in first phase; n = 17 in second phase). Questionnaire data (Phase 1) revealed that rubber tappers with availability of electric light had significantly shorter sleep on work days (30 min/day less) than those without electric light. Analysis of the data from the Phase 2 sample showed a significant delay in the timing of melatonin onset in workers with electric light compared to those without electric light (p < 0.01). Electric lighting delayed sleep onset and reduced sleep duration during the work week and appears to interfere with alignment of the circadian timing system to the natural light/dark cycle.

Item Type:	Article
Divisions :	Faculty of Health and Medical Sciences > School of Biosciences and Medicine > Department of Biochemical Sciences
Authors :	Name Email ORCID Moreno, CR Vasconcelos, S Marqueze, EC Lowden, A Middleton, B Fischer, FM Louzada, FM Skene, DJ
Date :	11 September 2015
DOI :	10.1038/srep14074
Related URLs :	Author
Additional Information :	This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
Depositing User :	Symplectic Elements
Date Deposited :	06 Oct 2015 10:16
Last Modified :	31 Oct 2017 17:41
URI:	http://epubs.surrey.ac.uk/id/eprint/808676

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