Evidence map›Paper›PMID 40620204›Full record

ArticlePaediatric and perinatal epidemiology2026

The Nationwide Impact of Guidelines for Prophylactic Aspirin Treatment for Preeclampsia.

Julie Hauer Vendelbo, Mette Østergaard Thunbo, Tine Brink Henriksen, Zeyan Liew, Agnete Larsen, Lars Henning Pedersen

Abstract read
In one paragraph

Article in Paediatric and perinatal epidemiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–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

1 citing paper in PubMed.

  1. 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

6 authors.

Julie Hauer VendelboDepartment of Clinical Medicine, Aarhus University, Aarhus, Denmark.ORCID https://orcid.org/0009-0007-9329-7905
Mette Østergaard ThunboDepartment of Clinical Medicine, Aarhus University, Aarhus, Denmark.ORCID https://orcid.org/0000-0002-7180-3180
Tine Brink HenriksenDepartment of Clinical Medicine, Aarhus University, Aarhus, Denmark.ORCID https://orcid.org/0000-0001-6933-8294
Zeyan LiewDepartment of Environmental Health Sciences, Yale School of Public Health, New Haven, Connecticut, USA.ORCID https://orcid.org/0000-0002-9424-7869
Agnete LarsenDepartment of Biomedicine, Aarhus University, Aarhus, Denmark.
Lars Henning PedersenDepartment of Clinical Medicine, Aarhus University, Aarhus, Denmark.ORCID https://orcid.org/0000-0001-6726-1991

Funding

Neurodevelopmental Effect of Acetaminophen ExposuresR01HD109213 · NICHD · YALE UNIVERSITY · PI ZEYAN LIEW · 2023 to 2026
$2.1M
Aarhus UniversitetEunice Kennedy Shriver National Institute of Child Health and Human Development R01HD109213NICHD NIH HHS R01 HD109213Novo Nordisk Fonden NNF18OC0054457
6 · The paper itself

Abstract

backgroundPreeclampsia is a common pregnancy complication associated with maternal and neonatal mortality. Early aspirin treatment lowers the risk of preeclampsia in high-risk pregnancies. However, knowledge of aspirin's effects and possible side effects outside clinical trials is sparse, and the evaluation of maternal and foetal safety regarding aspirin treatment is hindered by the inherent risk of confounding by indication.

objectivesTo study if the introduction of national guidelines recommending aspirin as preeclampsia prophylaxis affects clinical practice in Denmark, measured by aspirin use and investigate if the guideline change was related to the proportion of preeclampsia, preterm delivery, postpartum haemorrhage (PPH), placental abruption or neonatal intracranial haemorrhage.

methodsAll singleton pregnancies (1997-2016) identified in the nationwide Danish registries (gestational age ≥ 10 weeks) were included. The population was divided into persons at high or low risk of preeclampsia, according to the 2012 Danish National Guideline for Prevention and Treatment of Preeclampsia. Aspirin use was estimated based on redeemed prescriptions. The proportion of outcomes was compared using interrupted time series analyses.

resultsOf 1,323,750 pregnant persons, 2.0% (n = 25,826) were considered at high risk of preeclampsia. After the 2012 guideline change, aspirin use in high-risk pregnancies increased from 2.2% to 12.4% in 4 years, a 0.88 (95% confidence interval [CI] 0.83, 0.93) percentage point change for every half year. Severe preeclampsia slightly decreased from 6.0% to 5.2% after the guideline change, with a -0.22 (95% CI -0.43, -0.01) percentage point change for every half year, while preterm delivery rates remained unchanged. PPH increased in high-risk pregnancies. There was no difference in the risks of placental abruption or neonatal intracranial haemorrhage.

conclusionsAfter the introduction of preventive aspirin treatment, aspirin use in high-risk pregnancies increased, and severe preeclampsia decreased. However, PPH increased, while rates of preterm delivery, placental abruption and neonatal intracranial haemorrhage remained unchanged.

Indexed as

AspirinPlatelet Aggregation InhibitorsPre-EclampsiaAdultDenmarkFemaleHumansInfant, NewbornPostpartum HemorrhagePractice Guidelines as TopicPregnancyPremature BirthRegistriesAspirinPlatelet Aggregation Inhibitorsacetylsalicylic acidinterrupted time series analysispostpartum haemorrhagepre‐eclampsiapremature birth

Identifiers

PMID40620204
PMCPMC12853230

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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.