Evidence map›Paper›PMID 34461851›Full record

Observational studyBMC pregnancy and childbirth2021

Using the Robson classification to assess caesarean section rates in Brazil: an observational study of more than 24 million births from 2011 to 2017.

Enny S Paixao, Christian Bottomley, Liam Smeeth, Maria Conceicao N da Costa, Maria Gloria Teixeira, Maria Yury Ichihara, Ligia Gabrielli, Mauricio L Barreto, Oona M R Campbell

Abstract readObservational Study
In one paragraph

Observational study in BMC pregnancy and childbirth, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing 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

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

  1. Pooled it
  2. Article
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  7. Article
  8. [Classification of caesarean sections by 10 Robson groups in a second level hospital].Revista medica del Instituto Mexicano del Seguro Social · 2023
    Observational
  9. Article
  10. Article
  11. Article
  12. Article
  13. Mucinous Cystadenoma Arising in a Uterine Isthmocele: A Case Report.Revista brasileira de ginecologia e obstetricia : revista da Federacao Brasileira das Sociedades de Ginecologia e Obstetricia · 2023
    Article
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  15. Observational
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.

Enny S PaixaoFaculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, United Kingdom. enny.cruz@lshtm.ac.uk.
Christian BottomleyFaculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, United Kingdom.
Liam SmeethFaculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, United Kingdom.
Maria Conceicao N da CostaCentro de Integração de Dados e Conhecimentos para Saúde, Fiocruz, Salvador, Bahia, Brazil.
Maria Gloria TeixeiraCentro de Integração de Dados e Conhecimentos para Saúde, Fiocruz, Salvador, Bahia, Brazil.
Maria Yury IchiharaCentro de Integração de Dados e Conhecimentos para Saúde, Fiocruz, Salvador, Bahia, Brazil.
Ligia GabrielliInstitute of Collective Health, Federal University of Bahia - Salvador (BA), Salvador, Brazil.
Mauricio L BarretoCentro de Integração de Dados e Conhecimentos para Saúde, Fiocruz, Salvador, Bahia, Brazil.
Oona M R CampbellFaculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, United Kingdom.

Funding

Wellcome TrustWellcome Trust 202912 / Z / 16 / ZWellcome Trust 213589/Z/18/Z
6 · The paper itself

Abstract

backgroundApplying the Robson classification to all births in Brazil, the objectives of our study were to estimate the rates of caesarean section delivery, assess the extent to which caesarean sections were clinically indicated, and identify variation across socioeconomic groups.

methodsWe conducted a population-based study using routine records of the Live Births Information System in Brazil from January 1, 2011, to December 31, 2017. We calculated the relative size of each Robson group; the caesarean section rate; and the contribution to the overall caesarean section rate. We categorised Brazilian municipalities using the Human Development Index to explore caesarean section rates further. We estimated the time trend in caesarean section rates.

resultsThe rate of caesarean sections was higher in older and more educated women. Prelabour caesarean sections accounted for more than 54 % of all caesarean deliveries. Women with a previous caesarean section (Group 5) made up the largest group (21.7 %). Groups 6-9, for whom caesarean sections would be indicated in most cases, all had caesarean section rates above 82 %, as did Group 5. The caesarean section rates were higher in municipalities with a higher HDI. The general Brazilian caesarean section rate remained stable during the study period.

conclusionsBrazil is a country with one of the world's highest caesarean section rates. This nationwide population-based study provides the evidence needed to inform efforts to improve the provision of clinically indicated caesarean sections. Our results showed that caesarean section rates were lower among lower socioeconomic groups even when clinically indicated, suggesting sub-optimal access to surgical care.

Indexed as

Birth RateAdultBrazilCesarean SectionCitiesFemaleHumansMiddle AgedPregnancyRoutinely Collected Health DataSocioeconomic FactorsYoung AdultBrazilCaesarean section ratesMode of deliveryRobson classification

Identifiers

PMID34461851
PMCPMC8406968

What OpenQuestion holds

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Registered trials

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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.