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

Beijamini, F., Knutson, K. L., Lorenzi-Filho, G., Egan, Kate, Taporoski, T. P., De Paula, L. K. G., Negrão, A. B., Horimoto, A. R. V. R., Duarte, N. E., Vallada, H., Krieger, J. E., Pedrazzoli, M., Pereira, A. C. and von Schantz, Malcolm (2016) Timing and quality of sleep in a rural Brazilian family-based cohort, the Baependi Heart Study. Scientific Reports, 6 (1). p. 39283. ISSN 2045-2322

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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
Additional Information: Funding information: We are very thankful to the population of Baependi for their participation in the Baependi Heart Study. This study was supported by awards from CNPq to FB, HV and MvS (400791/2015-5), and by the Global Innovation Initiative to MvS (jointly funded by the British Council and the UK Department of Business and Skills), and by grants from Fundação de Amparo a Pesquisa do Estado de São Paulo (FAPESP, 2013/17368-0, to ACP), and Hospital Samaritano Society [Grant 25000.180.664/2011-35], through the Ministry of Health to Support Program Institutional Development of the Unified Health System (SUS-PROADI).
Subjects: B100 Anatomy, Physiology and Pathology
B900 Others in Subjects allied to Medicine
C800 Psychology
Department: Faculties > Health and Life Sciences > Psychology
Depositing User: Rachel Branson
Date Deposited: 27 Aug 2021 10:05
Last Modified: 27 Aug 2021 10:15
URI: http://nrl.northumbria.ac.uk/id/eprint/47019

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