ArticleScientific reports2016
Timing and quality of sleep in a rural Brazilian family-based cohort, the Baependi Heart Study.
Article in Scientific reports, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed, 33 citations in OpenAlex.
- Sleepiness, sleep deprivation, quality of life, mental symptoms and perception of academic environment in medical students.BMC medical education · 2021Trial
- Early chronotype with advanced activity rhythms and dim light melatonin onset in a rural population.Journal of pineal research · 2020Trial
- Trial
- Heritability of sleep architecture based on home polysomnography.Journal of sleep research · 2025Article
- Are humans facing a sleep epidemic or enlightenment? Large-scale, industrial societies exhibit long, efficient sleep yet weak circadian function.Proceedings. Biological sciences · 2025Article
- Sleep tight! Adolescent sleep quality across three distinct sleep ecologies.Evolution, medicine, and public health · 2023Article
- Sleep Under Preindustrial Conditions: What We Can Learn from It.Methods in molecular biology (Clifton, N.J.) · 2022Article
- Article
- Association between Sleep Timing and Weight Status among 14- to 19-Year-Old Adolescents in Wuhan, China.International journal of environmental research and public health · 2020Article
- Sleep and light exposure across different levels of urbanisation in Brazilian communities.Scientific reports · 2018Article
- Comparison between an African town and a neighbouring village shows delayed, but not decreased, sleep during the early stages of urbanisation.Scientific reports · 2017Article
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Authors and funding
14 authors at 4 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
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.
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