Evidence map›Paper›PMID 28320344›Full record

ArticleBMC pregnancy and childbirth2017

Risk factors associated with adverse perinatal outcome in planned vaginal breech labors at term: a retrospective population-based case-control study.

Georg Macharey, Mika Gissler, Veli-Matti Ulander, Leena Rahkonen, Mervi Väisänen-Tommiska, Mika Nuutila, Seppo Heinonen

Open access · goldAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in BMC pregnancy and childbirth, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed, 1 pooled it
3.4field-weighted citation impact, top 8% 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

12 citing papers in PubMed, 1 synthesis or guideline pooled it, 33 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Evidence for the benefit of prenatal pelvimetry in breech presentation at term: A low intertuberous distance is associated with assisted head delivery and short-term neonatal morbidity.International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics · 2026
    Article
  4. Article
  5. Article
  6. Observational
  7. Article
  8. Risk factors for adverse outcomes in vaginal preterm breech labor.Archives of gynecology and obstetrics · 2021
    Article
  9. Article
  10. Observational
  11. Article
  12. Article
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

7 authors at 2 institutions in 1 country.

Georg MachareyObstetrics and Gynaecology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland. georg.Macharey@hus.fi.ORCID 0000-0002-3337-3896
Mika GisslerTHL National Institute for Health and Welfare, Helsinki, Finland.
Veli-Matti UlanderObstetrics and Gynaecology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.
Leena RahkonenObstetrics and Gynaecology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.
Mervi Väisänen-TommiskaObstetrics and Gynaecology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.
Mika NuutilaObstetrics and Gynaecology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.
Seppo HeinonenObstetrics and Gynaecology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.
University of Helsinki · FIFinnish Institute for Health and Welfare · FI

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundVaginal breech delivery is associated with adverse perinatal outcome. The aim of this study was to identify factors associated with adverse perinatal outcome in term breech pregnancies, and to provide clinicians an aid in selecting women for a trial of vaginal labor with the fetus in breech position.

methodsWe conducted a retrospective, nationwide, Finnish population-based case-control study. All planned singleton vaginal deliveries at term with the fetus in breech position between the years 2005 and 2014 were analyzed. The study's end point was a composite set of adverse perinatal outcomes. All infants with an adverse outcome were compared to the infants with normal outcomes. A multivariate logistic regression model was used to analyze the data.

resultsAn adverse perinatal outcome was recorded for 73 (1.5%) infants. According to the study results fetal growth restriction (adjusted odds ratio, 2.94; 95% CI, 1.30-6.67), oligohydramnios (adjusted odds ratio, 2.94; 95% CI, 1.15-7.18), a history of cesarean section (adjusted odds ratio, 2.94; 95% CI, 1.28-6.77, gestational diabetes (adjusted odds ratio, 2.89; 95% CI, 1.54-5.40), epidural anesthesia (adjusted odds ratio, 2.20; 95% CI, 1.29-3.75) and nulliparity (adjusted odds ratio, 1.84; 95% CI, 1.10-3.08) were associated with adverse perinatal outcome.

conclusionsAdverse perinatal outcome in planned vaginal breech labor at term is associated with fetal growth restriction, oligohydramnios, previous cesarean delivery, gestational diabetes, nulliparity and epidural anesthesia.

Indexed as

Breech PresentationPregnancy OutcomeTerm BirthAdultAnesthesia, EpiduralCase-Control StudiesCesarean SectionDelivery, ObstetricFemaleFinlandGestational AgeHumansLogistic ModelsOdds RatioParityPerinatal CareBreech presentationCesarean sectionFetal growth restrictionGestational diabetesMacrosomiaOligohydramniosPerinatal morbidityPerinatal mortalityRisk factors

Identifiers

PMID28320344
PMCPMC5359881
OpenAlexW2603322193

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.