Evidence map›Paper›PMID 34511405›Full record

ArticleEvidence-based mental health2022

Caesarean section and its relationship to offspring general cognitive ability: a registry-based cohort study of half a million young male adults.

Viktor H Ahlqvist, Lucas D Ekström, Egill Jónsson-Bachmann, Per Tynelius, Paul Madley-Dowd, Martin Neovius, Cecilia Magnusson, Daniel Berglind

Open access · hybridAbstract read
In one paragraph

Article in Evidence-based mental health, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed
1.4field-weighted citation impact, top 17% of its field
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

3 citing papers in PubMed, 10 citations in OpenAlex.

  1. Article
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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

8 authors at 3 institutions in 2 countries.

Viktor H AhlqvistDepartment of Global Public Health, Karolinska Institutet, Stockholm, Sweden viktor.ahlqvist@ki.se.ORCID 0000-0003-1383-3194
Lucas D EkströmDepartment of Global Public Health, Karolinska Institutet, Stockholm, Sweden.ORCID 0000-0002-0377-6002
Egill Jónsson-BachmannDepartment of Global Public Health, Karolinska Institutet, Stockholm, Sweden.
Per TyneliusDepartment of Global Public Health, Karolinska Institutet, Stockholm, Sweden.
Paul Madley-DowdCentre for Academic Mental Health, Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK.
Martin NeoviusClinical Epidemiology Division, Department of Medicine (Solna), Karolinska Institutet, Stockholm, Sweden.
Cecilia MagnussonDepartment of Global Public Health, Karolinska Institutet, Stockholm, Sweden.
Daniel BerglindDepartment of Global Public Health, Karolinska Institutet, Stockholm, Sweden.
Karolinska Institutet · SEUniversity of Bristol · GBUppsala University · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundA relationship between caesarean section and offspring cognitive ability has been described, but data are limited, and a large-scale study is needed.

objectiveTo determine the relationship between mode of delivery and general cognitive ability.

methodsA cohort of 579 244 singleton males, born between 1973 and 1987 who conscripted before 2006, were identified using the Swedish population-based registries. Their mode of delivery was obtained from the Swedish Medical Birth registry. The outcome measure was a normalised general cognitive test battery (mean 100, SD 15) performed at military conscription at around age 18.

findingsMales born by caesarean section performed poorer compared with those born vaginally (mean score 99.3 vs 100.1; adjusted mean difference -0.84; 95% CI -0.97 to -0.72; p<0.001). Both those born by elective (99.3 vs 100.2; -0.92; 95% CI -1.24 to -0.60; p<0.001) and non-elective caesarean section (99.2 vs 100.2; -1.03; 95% CI -1.34 to -0.72; p=0.001), performed poorer than those born vaginally. In sibling analyses, the association was attenuated to the null (100.9 vs 100.8; 0.07; 95% CI -0.31 to 0.45; p=0.712). Similarly, neither elective nor non-elective caesarean section were associated with general cognitive ability in sibling analyses.

conclusionBirth by caesarean section is weakly associated with a lower general cognitive ability in young adult males. However, the magnitude of this association is not clinically relevant and seems to be largely explained by familial factors shared between siblings. CLINICAL IMPLICATION: Clinicians and gravidas ought not to be concerned that the choice of mode of delivery will impact offspring cognitive ability.

Indexed as

Cesarean SectionCognitionAdolescentCohort StudiesFemaleHumansMalePregnancyRegistriesSwedenYoung Adult

Identifiers

PMID34511405
PMCPMC8788259
OpenAlexW3201093086

What OpenQuestion holds

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LicenceCC BY
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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.