Evidence map›Paper›PMID 28720787›Full record

ArticleScientific reports2017

Comparison between an African town and a neighbouring village shows delayed, but not decreased, sleep during the early stages of urbanisation.

Andrew D Beale, Mario Pedrazzoli, Bruno da Silva B Gonçalves, Felipe Beijamini, Núbia E Duarte, Kieren J Egan, Kristen L Knutson, Malcolm von Schantz, Laura C Roden

Abstract readComparative Study
In one paragraph

Article in Scientific reports, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

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.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

35 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Mosquito feeding behavior and how it influences residual malaria transmission across Africa.Proceedings of the National Academy of Sciences of the United States of America · 2019
    Pooled it
  2. Trial
  3. Article
  4. Article
  5. Article
  6. Sleep Health in Human Biology Research.American journal of human biology : the official journal of the Human Biology Council · 2025
    Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Review
  20. Sleep Under Preindustrial Conditions: What We Can Learn from It.Methods in molecular biology (Clifton, N.J.) · 2022
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors.

Andrew D BealeFaculty of Health and Medical Sciences, University of Surrey, Guildford, Surrey, UK.ORCID 0000-0002-2051-0919
Mario PedrazzoliSchool of Arts, Science, and Humanities, University of São Paulo, São Paulo, Brazil.
Bruno da Silva B GonçalvesSchool of Arts, Science, and Humanities, University of São Paulo, São Paulo, Brazil.
Felipe BeijaminiFederal University of Fronteira Sul, Realeza, Paraná, Brazil.ORCID 0000-0002-8632-2101
Núbia E DuarteDepartment of Mathematics, National University of Colombia, Manizales, Colombia.
Kieren J EganFaculty of Health and Medical Sciences, University of Surrey, Guildford, Surrey, UK.
Kristen L KnutsonCenter for Circadian and Sleep Medicine, Department of Neurology, Northwestern University, Chicago, IL, USA.
Malcolm von SchantzFaculty of Health and Medical Sciences, University of Surrey, Guildford, Surrey, UK. m.von.schantz@surrey.ac.uk.ORCID 0000-0002-9911-9436
Laura C RodenDepartment of Molecular & Cell Biology, University of Cape Town, Private Bag Rondebosch, Cape Town, South Africa.

Funding

Research Design, Data, and Analytics CoreP30DK092949 · NIDDK · UNIVERSITY OF CHICAGO · PI Ronald T. Ackermann, MARSHALL H CHIN · 2011 to 2026
$10.0M
Home sleep and circadian phase: mediators of racial disparities in diabetes riskR01DK095207 · NIDDK · UNIVERSITY OF CHICAGO · PI KNUTSON, KRISTEN · 2012 to 2016
$2.1M
NIDDK NIH HHS P30 DK092949NIDDK NIH HHS R01 DK095207
6 · The paper itself

Abstract

The well-established negative health outcomes of sleep deprivation, and the suggestion that availability of electricity may enable later bed times without compensating sleep extension in the morning, have stimulated interest in studying communities whose sleep pattern may resemble a pre-industrial state. Here, we describe sleep and activity in two neighbouring communities, one urban (Milange) and one rural (Tengua), in a region of Mozambique where urbanisation is an ongoing process. The two communities differ in the amount and timing of daily activity and of light exposure, with later bedtimes (≈1 h) associated with more evening and less daytime light exposure seen in the town of Milange. In contrast to previous reports comparing communities with and without electricity, sleep duration did not differ between Milange (7.28 h) and Tengua (7.23 h). Notably, calculated sleep quality was significantly poorer in rural Tengua than in Milange, and poor sleep quality was associated with a number of attributes more characteristic of rural areas, including more intense physical labour and less comfortable sleeping arrangements. Thus, whilst our data support the hypothesis that access to electricity delays sleep timing, the higher sleep quality in the urban population also suggests that some aspects of industrialisation are beneficial to sleep.

Indexed as

LightingUrbanizationAdolescentAdultCircadian RhythmFemaleHumansMaleMiddle AgedMozambiqueSleepTime FactorsWakefulness

Identifiers

PMID28720787
PMCPMC5515911

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.