Evidence map›Paper›PMID 34469604›Full record

ArticleActa paediatrica (Oslo, Norway : 1992)2022

Birth outcomes between 22 and 26 weeks' gestation in national population-based cohorts from Sweden, England and France.

Andrei S Morgan, Jennifer Zeitlin, Karin Källén, Elizabeth S Draper, Karel Maršál, Mikael Norman, Fredrik Serenius, Stef van Buuren, Samantha Johnson, Valérie Benhammou and 5 more

Abstract read
In one paragraph

Article in Acta paediatrica (Oslo, Norway : 1992), 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.

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

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

  1. Pooled it
  2. Outcomes at 21 weeks' gestation: a case series with neurodevelopmental follow-up.Journal of perinatology : official journal of the California Perinatal Association · 2026
    Article
  3. Observational
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  12. Considerations for obstetric management of births 22-25 weeks' gestation.Journal of perinatology : official journal of the California Perinatal Association · 2025
    Review
  13. It's the little things. A framework and guidance for programs to care for infants 22-23 weeks' gestational age.Journal of perinatology : official journal of the California Perinatal Association · 2025
    Review
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

15 authors.

Andrei S MorganObstetrical Perinatal and Pediatric Epidemiology Research Team (EPOPé), CRESS, INSERM, INRAE, Université de Paris, Paris, France.ORCID https://orcid.org/0000-0003-4143-1977
Jennifer ZeitlinObstetrical Perinatal and Pediatric Epidemiology Research Team (EPOPé), CRESS, INSERM, INRAE, Université de Paris, Paris, France.ORCID https://orcid.org/0000-0002-9568-2969
Karin KällénCentre of Reproductive Epidemiology, Lund University, Lund, Sweden.ORCID https://orcid.org/0000-0001-5765-2630
Elizabeth S DraperDepartment of Health Sciences, University of Leicester, Leicester, UK.ORCID https://orcid.org/0000-0001-9340-8176
Karel MaršálDepartment of Obstetrics and Gynecology, Skåne University Hospital, Lund University, Lund, Sweden.ORCID https://orcid.org/0000-0002-3837-6332
Mikael NormanDivision of Pediatrics, Department of Clinical Science, Intervention, and Technology, Karolinska Institutet, Stockholm, Sweden.ORCID https://orcid.org/0000-0003-4191-3781
Fredrik SereniusDepartment of Women's and Children's Health, Uppsala University, Uppsala, Sweden.ORCID https://orcid.org/0000-0003-2194-2374
Stef van BuurenNetherlands Organisation for Applied Scientific Research TNO, Leiden, Netherlands.ORCID https://orcid.org/0000-0003-1098-2119
Samantha JohnsonDepartment of Health Sciences, University of Leicester, Leicester, UK.
Valérie BenhammouObstetrical Perinatal and Pediatric Epidemiology Research Team (EPOPé), CRESS, INSERM, INRAE, Université de Paris, Paris, France.
Véronique PierratObstetrical Perinatal and Pediatric Epidemiology Research Team (EPOPé), CRESS, INSERM, INRAE, Université de Paris, Paris, France.ORCID https://orcid.org/0000-0001-7435-5144
Monique KaminskiObstetrical Perinatal and Pediatric Epidemiology Research Team (EPOPé), CRESS, INSERM, INRAE, Université de Paris, Paris, France.
Laurence Foix L'HeliasObstetrical Perinatal and Pediatric Epidemiology Research Team (EPOPé), CRESS, INSERM, INRAE, Université de Paris, Paris, France.ORCID https://orcid.org/0000-0002-5699-4839
Pierre-Yves AncelObstetrical Perinatal and Pediatric Epidemiology Research Team (EPOPé), CRESS, INSERM, INRAE, Université de Paris, Paris, France.
Neil MarlowUCL Elizabeth Garrett Anderson Institute for Women's Health London, University College London, London, UK.ORCID http://orcid.org/0000-0001-5890-2953

Funding

Medical Research Council G0401525Medical Research Council MR/N024869/1
6 · The paper itself

Abstract

aimWe investigated the timing of survival differences and effects on morbidity for foetuses alive at maternal admission to hospital delivered at 22 to 26 weeks' gestational age (GA).

methodsData from the EXPRESS (Sweden, 2004-07), EPICure-2 (England, 2006) and EPIPAGE-2 (France, 2011) cohorts were harmonised. Survival, stratified by GA, was analysed to 112 days using Kaplan-Meier analyses and Cox regression adjusted for population and pregnancy characteristics; neonatal morbidities, survival to discharge and follow-up and outcomes at 2-3 years of age were compared.

resultsAmong 769 EXPRESS, 2310 EPICure-2 and 1359 EPIPAGE-2 foetuses, 112-day survival was, respectively, 28.2%, 10.8% and 0.5% at 22-23 weeks' GA; 68.5%, 40.0% and 23.6% at 24 weeks; 80.5%, 64.8% and 56.9% at 25 weeks; and 86.6%, 77.1% and 74.4% at 26 weeks. Deaths were most marked in EPIPAGE-2 before 1 day at 22-23 and 24 weeks GA. At 25 weeks, survival varied before 28 days; differences at 26 weeks were minimal. Cox analyses were consistent with the Kaplan-Meier analyses. Variations in morbidities were not clearly associated with survival.

conclusionDifferences in survival and morbidity outcomes for extremely preterm births are evident despite adjustment for background characteristics. No clear relationship was identified between early mortality and later patterns of morbidity.

Indexed as

Infant, Premature, DiseasesPremature BirthFemaleFranceGestational AgeHumansInfant, NewbornMorbidityPregnancySwedenepidemiologyextreme preterm birthinternational comparisonsneonatalperinatalsurvival analysis

Identifiers

PMID34469604
PMCPMC9291863

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Registered trials

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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.