Evidence map›Paper›PMID 26861478›Full record

ArticleInternational journal of epidemiology2016

Prenatal and infant paracetamol exposure and development of asthma: the Norwegian Mother and Child Cohort Study.

Maria C Magnus, Øystein Karlstad, Siri E Håberg, Per Nafstad, George Davey Smith, Wenche Nystad

Open access · bronzeAbstract read
In one paragraph

Article in International journal of epidemiology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed, 2 pooled it
7.4field-weighted citation impact, top 2% 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

37 citing papers in PubMed, 2 syntheses or guidelines pooled it, 95 citations in OpenAlex.

  1. Guideline
  2. Long-Term Safety of Prenatal and Neonatal Exposure to Paracetamol: A Systematic Review.International journal of environmental research and public health · 2022
    Pooled it
  3. Article
  4. A Single Early-Life Acetaminophen Exposure Causes Persistent Abnormalities in the Murine Lung.American journal of respiratory cell and molecular biology · 2025
    Article
  5. Asthma Inception: Epidemiologic Risk Factors and Natural History Across the Life Course.American journal of respiratory and critical care medicine · 2024
    Review
  6. Article
  7. Review
  8. Article
  9. Review
  10. Article
  11. Paracetamol preceding very preterm birth: Is it safe?Acta obstetricia et gynecologica Scandinavica · 2022
    Article
  12. Review
  13. S3 guideline Allergy Prevention.Allergologie select · 2022
    Article
  14. Review
  15. Article
  16. Review
  17. Article
  18. Review
  19. Article
  20. Review
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors at 2 institutions in 2 countries.

Maria C MagnusDivision of Mental and Physical Health, Norwegian Institute of Public Health, Oslo, Norway Maria.Christine.Magnus@fhi.no.
Øystein KarlstadDivision of Mental and Physical Health, Norwegian Institute of Public Health, Oslo, Norway.
Siri E HåbergDivision of Mental and Physical Health, Norwegian Institute of Public Health, Oslo, Norway.
Per NafstadDivision of Mental and Physical Health, Norwegian Institute of Public Health, Oslo, Norway Department of Community Medicine, University of Oslo, Oslo, Norway and.
George Davey SmithMRC Integrative Epidemiology Unit at the University of Bristol, School of Social and Community Medicine, Bristol, UK.
Wenche NystadDivision of Mental and Physical Health, Norwegian Institute of Public Health, Oslo, Norway.
Norwegian Institute of Public Health · NOUniversity of Bristol · GB

Funding

Norway Mother & Child Cohort Study (MoBa) Continued Specimen Collection, and Tools to Enhance Use and CollaborationN01ES75558 · NIEHS · NORWEGIAN INSTITUTE OF PUBLIC HEALTH · PI MAGNUS, PER · 2007 to 2016
$11.8M
Medical Research Council MC_UU_12013/1Medical Research Council MC_UU_12013_1NIEHS NIH HHS N01ES75558
6 · The paper itself

Abstract

backgroundParacetamol exposure has been positively associated with asthma development. The relative importance of prenatal vs infant exposure and confounding by indication remains elusive. We examined the association of prenatal and infant (first 6 months) paracetamol exposure with asthma development while addressing confounding by indication.

methodsWe used information from the Norwegian Mother and Child Cohort Study, including 53169 children for evaluation of current asthma at 3 years, 25394 for current asthma at 7 years and 45607 for dispensed asthma medications at 7 years in the Norwegian Prescription Database. We calculated adjusted relative risks (adj. RR) and 95% confidence intervals (CI) using log-binomial regression.

resultsThere were independent modest associations between asthma at 3 years with prenatal paracetamol exposure (adj. RR 1.13; 95% CI: 1.02-1.25) and use of paracetamol during infancy (adj. RR 1.29; 95% CI: 1.16-1.45). The results were consistent for asthma at 7 years. The associations with prenatal paracetamol exposure were seen for different indications (pain, respiratory tract infections/influenza and fever). Maternal pain during pregnancy was the only indication that showed an association both with and without paracetamol use. Maternal paracetamol use outside pregnancy and paternal paracetamol use were not associated with asthma development. In a secondary analysis, prenatal ibuprofen exposure was positively associated with asthma at 3 years but not asthma at 7 years.

conclusionsThis study provides evidence that prenatal and infant paracetamol exposure have independent associations with asthma development. Our findings suggest that the associations could not be fully explained by confounding by indication.

Indexed as

MothersAcetaminophenAnalgesics, Non-NarcoticAsthmaChild, PreschoolCohort StudiesFemaleHumansInfantMaleMaternal ExposureMultivariate AnalysisNorwayPregnancyPrenatal Exposure Delayed EffectsRisk FactorsAcetaminophenAnalgesics, Non-NarcoticAsthmaepidemiologyibuprofenparacetamol

Identifiers

PMID26861478
PMCPMC5841883
OpenAlexW2254620904

What OpenQuestion holds

Textmetadata
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.