Evidence map›Paper›PMID 29775476›Full record

ArticlePloS one2018

Maternal asthma is associated with increased risk of perinatal mortality.

Mari Kemppainen, Anna-Maria Lahesmaa-Korpinen, Paula Kauppi, Martti Virtanen, Suvi M Virtanen, Riitta Karikoski, Mika Gissler, Turkka Kirjavainen

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed, 2 pooled it
5.5field-weighted citation impact, top 4% 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

27 citing papers in PubMed, 2 syntheses or guidelines pooled it, 52 citations in OpenAlex.

  1. Asthma Control During Pregnancy and Adverse Perinatal Outcomes: A Systematic Review.The Australian & New Zealand journal of obstetrics & gynaecology · 2026
    Pooled it
  2. Obesity and asthma during pregnancy: a systematic review and meta-analysis.European respiratory review : an official journal of the European Respiratory Society · 2025
    Pooled it
  3. Effect of asthma management with exhaled nitric oxideThe European respiratory journal · 2022
    Trial
  4. Article
  5. Article
  6. Article
  7. Article
  8. Review
  9. Association of maternal asthma with congenital heart defects in offspring.Acta obstetricia et gynecologica Scandinavica · 2025
    Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Review
  16. Maternal asthma in relation to infant size and body composition.The journal of allergy and clinical immunology. Global · 2023
    Article
  17. The Role of Climate Change in Asthma.Advances in experimental medicine and biology · 2023
    Article
  18. Asthma in pregnancy.Allergy and asthma proceedings · 2023
    Review
  19. Article
  20. Review
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

8 authors at 6 institutions in 2 countries.

Mari KemppainenDepartment of Paediatrics, Children's Hospital Helsinki University Hospital, Helsinki, Finland.ORCID 0000-0002-5680-7394
Anna-Maria Lahesmaa-KorpinenNational Institute for Health and Welfare, Information Services Department, Unit of Statistics and Registers, Helsinki, Finland.
Paula KauppiHelsinki University, Respiratory Medicine and Allergology, Helsinki, Finland.
Martti VirtanenNordic Casemix Center, Helsinki, Finland.
Suvi M VirtanenUnit of Nutrition, National Institute for Health and Welfare, Helsinki, Finland.
Riitta KarikoskiRegional State Administrative Agencies, Tampere, Finland.
Mika GisslerNational Institute for Health and Welfare, Information Services Department, Unit of Statistics and Registers, Helsinki, Finland.
Turkka KirjavainenDepartment of Paediatrics, Children's Hospital Helsinki University Hospital, Helsinki, Finland.
Helsinki University Hospital · FIFinnish Institute for Health and Welfare · FIKarolinska Institutet · SEMinistry of the Interior · FITampere University · FIUniversity of Helsinki · FI

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAsthma is the most common chronic disease during pregnancy and it may have influence on pregnancy outcome.

objectivesOur goal was to assess the association between maternal asthma and the perinatal risks as well as possible effects of asthma medication.

methodsThe study was based on a nationwide Finnish register-based cohort between the years 1996 and 2012 in the Drug and Pregnancy Database. The register data comprised 962 405 singleton live and stillbirths, 898 333 (93.3%) pregnancies in mothers with neither confirmed asthma nor use of asthma medication (controls), and 26 674 (2.8%) pregnancies with confirmed maternal asthma. 71% of mothers with asthma used asthma medication. The diagnosis of asthma was based on the mothers' right for subsidised medication which is carefully evaluated by strict criteria including pulmonary function testing. Odds ratio was used in comparison. Premature birth (PB), low birth weight, small for gestational age (SGA), neonatal death were the main outcome measures.

resultsMaternal asthma was associated with adjusted odds ratios (aORs) for perinatal mortality 1.24 (95% CI 1.05 to 1.46), preterm birth 1.18 (1.11 to 1.25), low birth weight 1.29 (1.21 to 1.37), fetal growth restriction (SGA) 1.32, (1.24 to 1.40), and asphyxia 1.09 (1.02 to 1.17). Asthma treatment reduced the increased risk of preterm birth aOR 0.85 (95% CI 0.76 to 0.96) but mothers with treated asthma had higher risks of fetal growth restriction (SGA) aOR 1.26 (1.10 to 1.45), and asphyxia aOR 1.37 (1.17 to 1.61) than mothers with untreated asthma.

conclusionAsthma is associated with increased risks of perinatal mortality, preterm birth, low birth weight, fetal growth restriction (SGA), and asphyxia. Asthma treatment reduces the risk of preterm delivery, but it does not seem to reduce other complications such as perinatal mortality.

Indexed as

Perinatal MortalityPregnancy ComplicationsAdultAsthmaCohort StudiesFemaleFinlandHumansInfant, Low Birth WeightInfant, NewbornInfant, Small for Gestational AgeOdds RatioPregnancyPregnancy OutcomePremature BirthRegistries

Identifiers

PMID29775476
PMCPMC5959067
OpenAlexW2804764761

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.