ArticleScientific reports2018
Sleep and light exposure across different levels of urbanisation in Brazilian communities.
Article in Scientific reports, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
35 citing papers in PubMed.
- Early chronotype with advanced activity rhythms and dim light melatonin onset in a rural population.Journal of pineal research · 2020Trial
- Human Circadian Rhythm Through the Lens of GIScience: A Systematic Review.Research square · 2026Article
- Physiologically-relevant light exposure and light behaviour in Switzerland and Malaysia.Journal of exposure science & environmental epidemiology · 2026Observational
- Time after time - circadian clocks through the lens of oscillator theory.FEBS letters · 2026Review
- Poor sleep health is associated with worse cardiometabolic risk among rural and urban schooled Nigerian adolescents.Scientific reports · 2025Article
- Modern Times: Longitudinal Study of Toba/Qom Communities Reveals Delay and Shortening of Sleep in Real-Time Across Electrification.bioRxiv : the preprint server for biology · 2025Article
- Evaluation of 2 different wrist actigraphy devices in the adult population.Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine · 2025Observational
- 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 Compensation on Work-Free days Is Associated with Better Sleep Quality.Nature and science of sleep · 2025Article
- Weekday-Weekend Differences in Chrononutritional Variables Depend on Urban or Rural Living.Nutrients · 2024Article
- Urbanisation negatively impacts sleep health and mood in adolescents: a comparative study of female students from city and rural schools of North India.Sleep and biological rhythms · 2024Article
- Individual sleep need is flexible and dynamically related to cognitive function.Nature human behaviour · 2024Review
- Light exposure differs by sex in the US, with females receiving less bright light.Npj biological timing and sleep · 2024Article
- More frequent naps are associated with lower cognitive development in a cohort of 8-38-month-old children, during the Covid-19 pandemic.JCPP advances · 2023Article
- Article
- Sleep deprivation among adolescents in urban and indigenous-rural Mexican communities.Scientific reports · 2023Article
- The Effect of Light Therapy on Electroencephalographic Sleep in Sleep and Circadian Rhythm Disorders: A Scoping Review.Clocks & sleep · 2022Article
- Outdoor daylight exposure and longer sleep promote wellbeing under COVID-19 mandated restrictions.Journal of sleep research · 2022Article
- Sleep Under Preindustrial Conditions: What We Can Learn from It.Methods in molecular biology (Clifton, N.J.) · 2022Article
- Technological infrastructure, sleep, and rest-activity patterns in a Kaqchikel Maya community.PloS one · 2022Article
Corrections and comments
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Authors and funding
5 authors.
Funding
Abstract
Quilombos are settlements originally founded by Africans and African descendants (Quilombolas) in remote parts of Brazil to escape slavery. Due to individual histories, Quilombos nowadays exhibit different states of industrialisation, making them ideal for studying the influence of electrification on daily behaviour. In a comparative approach, we aimed to understand whether and how human sleep changes with the introduction of artificial light. We investigated daily rest-activity-rhythms and sleep-patterns in the Quilombolas' by both wrist actimetry and the Munich ChronoType Questionnaire (MCTQ; the results of these two instruments correlated highly). Seven communities (MCTQ: N = 213/actimetry: N = 125) were compared in this study. Light exposure, phase of activity, sleep timing and duration differ across communities with various levels of urbanisation and histories of access to electricity. People living without electricity and those, who acquired it only very recently on average sleep earlier than those in more urbanised communities (mid-sleep about 1 hour earlier); sleep duration tends to be longer. Our results and those of others show that use of electricity and modern lifestyles have changed sleep behaviour. To understand the consequences of these changes for health, further studies are warranted.
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