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Timing and quality of sleep in a rural Brazilian family-based cohort, the Baependi Heart Study

Beijamini, F, Knutson, KL, Lorenzi-Filho, G, Egan, Kieren, Taporoski, TP, De Paula, LKG, Negrão, AB, Horimoto, ARVR, Duarte, NE, Vallada, H , Krieger, JE, Pedrazzoli, M, Pereira, AC and von Schantz, Malcolm (2016) Timing and quality of sleep in a rural Brazilian family-based cohort, the Baependi Heart Study Scientific Reports, 6, 39283. pp. 1-9.

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Abstract

Sleep is modulated by several factors, including sex, age, and chronotype. It has been hypothesised that contemporary urban populations are under pressure towards shorter sleep duration and poorer sleep quality. Baependi is a small town in Brazil that provides a window of opportunity to study the influence of sleep patterns in a highly admixed rural population with a conservative lifestyle. We evaluated sleep characteristics, excessive daytime sleepiness, and chronotype using the Pittsburgh Sleep Quality Index, Epworth Sleepiness Scale and Morningness-Eveningness Questionnaire questionnaires, respectively. The sample consisted of 1,334 subjects from the Baependi Heart study (41.5% male; age: 46.5±16.2 y, range: 18—89 years). Average self-reported sleep duration was 07:07±01:31 (bedtime 22:32±01:27, wake up time: 06:17±01:25 hh:min), sleep quality score was 4.9+3.2, chronotype was 63.6±10.8 and daytime sleepiness was 7.4±4.8. Despite a shift towards morningness in the population, chronotype remained associated with reported actual sleep timing. Age and sex modulated the ontogeny of sleep and chronotype, increasing age was associated with earlier sleep time and shorter sleep duration. Women slept longer and later, and reported poorer sleep quality than men (p<0.0001). This study provides indirect evidence in support of the hypothesis that sleep timing was earlier prior to full urbanisation.

Item Type: Article
Subjects : Biosciences and Medicine
Divisions : Faculty of Health and Medical Sciences > School of Biosciences and Medicine
Authors :
NameEmailORCID
Beijamini, FUNSPECIFIEDUNSPECIFIED
Knutson, KLUNSPECIFIEDUNSPECIFIED
Lorenzi-Filho, GUNSPECIFIEDUNSPECIFIED
Egan, Kierenk.egan@surrey.ac.ukUNSPECIFIED
Taporoski, TPUNSPECIFIEDUNSPECIFIED
De Paula, LKGUNSPECIFIEDUNSPECIFIED
Negrão, ABUNSPECIFIEDUNSPECIFIED
Horimoto, ARVRUNSPECIFIEDUNSPECIFIED
Duarte, NEUNSPECIFIEDUNSPECIFIED
Vallada, HUNSPECIFIEDUNSPECIFIED
Krieger, JEUNSPECIFIEDUNSPECIFIED
Pedrazzoli, MUNSPECIFIEDUNSPECIFIED
Pereira, ACUNSPECIFIEDUNSPECIFIED
von Schantz, MalcolmM.Von.Schantz@surrey.ac.ukUNSPECIFIED
Date : 23 December 2016
Identification Number : 10.1038/srep39283
Copyright Disclaimer : Copyright 2016 The Author(s). 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/
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 23 Nov 2016 12:27
Last Modified : 18 Jul 2017 14:56
URI: http://epubs.surrey.ac.uk/id/eprint/812943

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