Evidence map›Paper›PMID 37788898›Full record

ArticleArchives of disease in childhood. Fetal and neonatal edition2023

Factors associated with the increased incidence of necrotising enterocolitis in extremely preterm infants in Sweden between two population-based national cohorts (2004-2007 vs 2014-2016).

Pontus Challis, Karin Källén, Lars Björklund, Anders Elfvin, Aijaz Farooqi, Stellan Håkansson, David Ley, Mikael Norman, Erik Normann, Fredrik Serenius and 6 more

Open access · hybridAbstract read
In one paragraph

Article in Archives of disease in childhood. Fetal and neonatal edition, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed, 1 pooled it
1.6field-weighted citation impact, top 18% 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

13 citing papers in PubMed, 1 synthesis or guideline pooled it, 10 citations in OpenAlex.

  1. Guideline
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  6. Bowel habits in preterm infants: Observations from the first 2 weeks of life.Journal of pediatric gastroenterology and nutrition · 2025
    Observational
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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

16 authors at 8 institutions in 1 country.

Pontus ChallisDepartment of Clinical Sciences, Pediatrics, Umeå University, Umeå, Sweden pontus.challis@umu.se.ORCID http://orcid.org/0000-0002-7511-7217
Karin KällénDepartment of Clinical Sciences, Obstetrics and Gynecology, Lund University Faculty of Medicine, Lund, Sweden.ORCID http://orcid.org/0000-0001-5765-2630
Lars BjörklundDepartment of Clinical Sciences, Lund, Paediatrics, Lund University, Lund, Sweden.ORCID http://orcid.org/0000-0002-7456-4189
Anders ElfvinDepartment of Pediatrics, Institute of Clinical Sciences, University of Gothenburg Sahlgrenska Academy, Gothenburg, Sweden.ORCID http://orcid.org/0000-0002-1912-9563
Aijaz FarooqiDepartment of Clinical Sciences, Pediatrics, Umeå University, Umeå, Sweden.ORCID http://orcid.org/0000-0001-9803-6455
Stellan HåkanssonDepartment of Clinical Sciences, Pediatrics, Umeå University, Umeå, Sweden.
David LeyDepartment of Clinical Sciences, Lund, Paediatrics, Lund University, Lund, Sweden.
Mikael NormanDivision of Pediatrics, Department of Clinical Science, Intervention, and Technology, Karolinska Institutet, Stockholm, Sweden.ORCID http://orcid.org/0000-0003-4191-3781
Erik NormannDepartment of Women's and Children's Health, Uppsala University, Uppsala, Sweden.
Fredrik SereniusDepartment of Clinical Sciences, Pediatrics, Umeå University, Umeå, Sweden.
Karin SävmanDepartment of Pediatrics, Institute of Clinical Sciences, University of Gothenburg Sahlgrenska Academy, Gothenburg, Sweden.
Lena Hellström-WestasDepartment of Women's and Children's Health, Uppsala University, Uppsala, Sweden.
Petra Um-BergströmDepartment of Pediatrics, Södersjukhuset, Karolinska Institutet, Stockholm, Sweden.ORCID http://orcid.org/0000-0002-2715-2683
Ulrika ÅdénDivision of Pediatrics, Department of Clinical Science, Intervention, and Technology, Karolinska Institutet, Stockholm, Sweden.
Thomas AbrahamssonDepartments of Biomedical and Clinical Sciences and Pediatrics, Linköping University, Linköping, Sweden.
Magnus DomellöfDepartment of Clinical Sciences, Pediatrics, Umeå University, Umeå, Sweden.ORCID http://orcid.org/0000-0002-0726-7029
Umeå University · SELund University · SEUppsala University · SELinköping University · SEKarolinska Institutet · SEKarolinska University Hospital · SESahlgrenska University Hospital · SEUniversity of Gothenburg · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo investigate potential risk factors behind the increased incidence of necrotising enterocolitis (NEC) in Swedish extremely preterm infants.

designRegistry data from two population-based national cohorts were studied. NEC diagnoses (Bell stage ≥II) were validated against hospital records. PATIENTS: All liveborn infants <27 weeks of gestation 2004-2007 (n=704) and 2014-2016 (n=895) in Sweden.

main outcome measuresNEC incidence.

resultsThe validation process resulted in a 28% reduction of NEC cases but still confirmed a higher NEC incidence in the later epoch compared with the earlier (73/895 (8.2%) vs 27/704 (3.8%), p=0.001), while the composite of NEC or death was lower (244/895 (27.3%) vs 229/704 (32.5%), p=0.022). In a multivariable Cox regression model, censored for mortality, there was no significant difference in early NEC (0-7 days of life) between epochs (HR=0.9 (95% CI 0.5 to 1.9), p=0.9), but being born in the later epoch remained an independent risk factor for late NEC (>7 days) (HR=2.7 (95% CI 1.5 to 5.0), p=0.001). In propensity score analysis, a significant epoch difference in NEC incidence (12% vs 2.8%, p<0.001) was observed only in the tertile of infants at highest risk of NEC, where the 28-day mortality was lower in the later epoch (35% vs 50%, p=0.001). More NEC cases were diagnosed with intramural gas in the later epoch (33/73 (45.2%) vs 6/26 (23.1%), p=0.047).

conclusionsThe increase in NEC incidence between epochs was limited to cases occurring after 7 days of life and was partly explained by increased survival in the most extremely preterm infants. Misclassification of NEC is common.

Indexed as

Enterocolitis, NecrotizingInfant, Newborn, DiseasesHumansIncidenceInfant, Extremely PrematureInfant, NewbornSwedenGastroenterologyNeonatology

Identifiers

PMID37788898
PMCPMC10804036
OpenAlexW4387300236

What OpenQuestion holds

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LicenceCC BY
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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.