Evidence map›Paper›PMID 28321899›Full record

ArticleBirth (Berkeley, Calif.)2017

Labor induction and cesarean delivery: A prospective cohort study of first births in Pennsylvania, USA.

Kristen H Kjerulff, Laura B Attanasio, Joyce K Edmonds, Katy B Kozhimannil, John T Repke

Open access · greenAbstract read
In one paragraph

Article in Birth (Berkeley, Calif.), 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed, 1 pooled it
1.7field-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

16 citing papers in PubMed, 1 synthesis or guideline pooled it, 34 citations in OpenAlex.

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  4. Influence of premature rupture of membranes on the peripartum outcomes in vaginally intended breech deliveries at term: A FRABAT study.International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics · 2026
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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

5 authors at 5 institutions in 2 countries.

Kristen H KjerulffDepartments of Public Health Sciences and Obstetrics and Gynecology, Penn State University College of Medicine, Hershey, PA, USA.ORCID 0000-0002-5376-2581
Laura B AttanasioSewanee: The University of the South, Sewanee, TN, USA.
Joyce K EdmondsConnell School of Nursing, Boston College, Boston, MA, USA.ORCID 0000-0002-0465-9043
Katy B KozhimannilDivision of Health Policy and Management, University of Minnesota, School of Public Health, Minneapolis, MN, USA.
John T RepkeDepartment of Obstetrics and Gynecology, Penn State University College of Medicine, Hershey, PA, USA.
Boston College · USPenn State Milton S. Hershey Medical Center · USPennsylvania State University · USSewanee: The University of the South · USUniversity of Minnesota · US

Funding

Mode of First Delivery and Subsequent Child-BearingR01HD052990 · NICHD · PENNSYLVANIA STATE UNIV HERSHEY MED CTR · PI KJERULFF, KRISTEN HAWTHORNE · 2008 to 2012
$3.9M
NICHD NIH HHS R01 HD052990
6 · The paper itself

Abstract

backgroundMode of delivery at first childbirth largely determines mode of delivery at subsequent births, so it is particularly important to understand risk factors for cesarean delivery at first childbirth. In this study, we investigated risk factors for cesarean delivery among nulliparous women, with focus on the association between labor induction and cesarean delivery.

methodsA prospective cohort study of 2851 nulliparous women with singleton pregnancies who attempted vaginal delivery at hospitals in Pennsylvania, 2009-2011, was conducted. We used nested logistic regression models and multiple mediational analyses to investigate the role of three groups of variables in explaining the association between labor induction and unplanned cesarean delivery-the confounders of maternal characteristics and indications for induction, and the mediating (intrapartum) factors-including cervical dilatation, labor augmentation, epidural analgesia, dysfunctional labor, dystocia, fetal intolerance of labor, and maternal request of cesarean during labor.

resultsMore than a third of the women were induced (34.3%) and 24.8% underwent cesarean delivery. Induced women were more likely to deliver by cesarean (35.9%) than women in spontaneous labor (18.9%), unadjusted OR 2.35 (95% CI 1.97-2.79). The intrapartum factors significantly mediated the association between labor induction and cesarean delivery (explaining 76.7% of this association), particularly cervical dilatation <3 cm at hospital admission, fetal intolerance of labor, and dystocia. The indications for labor induction only explained 6.2%.

conclusionsIncreased risk of cesarean delivery after labor induction among nulliparous women is attributable mainly to lower cervical dilatation at hospital admission and higher rates of labor complications.

Indexed as

Labor, InducedParityAdolescentAdultAnalgesia, EpiduralCesarean SectionCohort StudiesDelivery, ObstetricDystociaFemaleHumansLabor Stage, FirstLogistic ModelsOxytocicsPennsylvaniaPregnancyOxytocicscervical dilatationcesarean deliverylabor inductionnulliparous

Identifiers

PMID28321899
PMCPMC6366839
OpenAlexW2599779147

What OpenQuestion holds

Textmetadata
LicenceTDM
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.