Evidence map›Paper›PMID 35788079›Full record

ArticleBMJ open2022

Breaking the myth: the association between the increasing incidence of labour induction and the rate of caesarean delivery in Finland - a nationwide Medical Birth Register study.

Heidi Kruit, Mika Gissler, Seppo Heinonen, Leena Rahkonen

Abstract read
In one paragraph

Article in BMJ open, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
–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

12 citing papers in PubMed.

  1. Trial
  2. Trial
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  4. Article
  5. Article
  6. Optimal timing for induction of labor in normotensive women: A retrospective cohort study.International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics · 2025
    Article
  7. Article
  8. Delivery mode and subsequent birth rate: A nationwide register-based analysis in Finland.International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics · 2025
    Article
  9. Association Between Pre-Pregnancy Body Mass Index and Labor Induction Success Rates: A Case Control Study.Medical science monitor : international medical journal of experimental and clinical research · 2024
    Article
  10. Article
  11. 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

4 authors.

Heidi KruitObstetrics and Gynecology, Helsinki University hospital and University of Helsinki, Helsinki, Finland heidi.kruit@hus.fi.ORCID 0000-0003-0350-7088
Mika GisslerFinnish Institute for Health and Welfare, Helsinki, Finland.
Seppo HeinonenObstetrics and Gynecology, Helsinki University hospital and University of Helsinki, Helsinki, Finland.
Leena RahkonenObstetrics and Gynecology, Helsinki University hospital and University of Helsinki, Helsinki, Finland.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesTo determine the association between the rate of labour induction and caesarean delivery.

designMedical Birth Register-based study. We used data from the nationwide Medical Birth Register collecting data on delivery outcomes on all births from 22+0 weeks and/or birth weight of at least 500 g.

settingFinland.

participants663 024 live births in Finland from 2008 to 2019.

main outcome measuresThe rates of labour induction and caesarean delivery.

resultsThe rate of labour induction increased from 17.8% to 30.3%; p<0.001, during the study. The total caesarean delivery rate was 16.5% (n=109 178). An increase of approximately 0.5% in the caesarean delivery rate occurred during the study period. The rate of caesarean delivery following labour induction slightly decreased (15.41% vs 15.35%; p<0.001). In multivariate logistic regression analysis, induction of labour was associated with a reduced risk for caesarean delivery (OR 0.72, 95% CI 0.71 to 0.74). The frequency of advanced maternal age (18.0% vs 23.5%; p<0.001), obesity (11.4% vs 15.1%; p<0.001) and gestational diabetes (9.8% vs 23.3%; p<0.001) increased during the study.

conclusionsThe 70% increase in the rate of labour induction in Finland has not led to a significant increase in the rate of caesarean delivery, which has remained one of the lowest in the world. Pregnant women in Finland are more frequently obese, older and diagnosed with gestational diabetes, which may partly explain the increase in the rate of labour induction.

Indexed as

Diabetes, GestationalCesarean SectionFemaleFinlandHumansIncidenceLabor, InducedPregnancyRisk Factorsepidemiologyfetal medicinematernal medicineobstetrics

Identifiers

PMID35788079
PMCPMC9255400

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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.