Evidence map›Paper›PMID 35213544›Full record

ArticlePloS one2022

Is there an increased risk of cesarean section in obese women after induction of labor? A retrospective cohort study.

Jenny Bjorklund, Eva Wiberg-Itzel, Tove Wallstrom

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Article in PloS one, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
30citing 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.

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3 · Its place in the literature

Who cites it

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

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  17. Prevalence and risk factors for placenta previa in a specialty hospital.Revista brasileira de ginecologia e obstetricia : revista da Federacao Brasileira das Sociedades de Ginecologia e Obstetricia · 2025
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4 · The record

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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

3 authors.

Jenny BjorklundDepartment of Clinical Science and Education Karolinska Institute, Soderhospital, Stockholm, Sweden.
Eva Wiberg-ItzelDepartment of Clinical Science and Education Karolinska Institute, Soderhospital, Stockholm, Sweden.
Tove WallstromDepartment of Clinical Science and Education Karolinska Institute, Soderhospital, Stockholm, Sweden.ORCID 0000-0003-2502-4116

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundObesity is increasing in Sweden and is also of huge global concern. Obesity increases the risk of complications during pregnancy and the need for the induction of labor. Induction of labor increases the number of complications during delivery, leading to women with more negative birth experience. This study investigated how maternal body mass index (BMI) during antenatal care enrollment affects labor outcomes (proportion of cesarean section at induction of labor).

methodThis was a retrospective cohort study of 3772 women with mixed parity and induction of labor at Soderhospital, Stockholm, in 2009-2010 and 2012-2013. The inclusion criteria were simplex, ≥34 gestational weeks, cephalic presentation and no previous cesarean section. The women were grouped according to BMI, and statistical analyzes were performed to compare the proportion of cesarean sections after induction of labor. The primary outcome was the proportion of cesarean section after induction of labor divided by group of maternal BMI. The secondary outcomes were postpartum hemorrhage >1000 ml, time of labor, fetal outcome data, and indication for emergency cesarean section.

resultThe induction of labor in women with a high BMI resulted in a significantly increased risk of cesarean section, with 18.4-24.1% of deliveries, depending on the BMI group. This outcome persisted after adjustment in women with BMI 25-29.9 (aOR 1.4; 95% CI; 1.1-1.7) and BMI 30-34.9 (aOR 1.5; 95% CI; 1.1-2.1). There was also a significantly higher risk for CS among primiparous women (aOR 3.6; 95% CI; 2.9-45) and if the newborn weighted ≥ four kilos (aOR 1.6; 95% CI; 1.3-2.0).

conclusionOur findings show that a higher BMI increased the risk of cesarean section after induction of labor in the groups with BMI 25-34.9. Parity seems to be the strongest risk factor for CS regardless other variables.

Indexed as

AdultBody Mass IndexCesarean SectionFemaleHumansInfant, NewbornLabor, InducedLabor, ObstetricObesityParityPregnancyPregnancy ComplicationsPregnancy, High-RiskSweden

Identifiers

PMID35213544
PMCPMC8880764

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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.