European Journal of Epidemiology

, Volume 18, Issue 8, pp 755–761

Pregnancy complications and the risk of asthma among Norwegians born between 1967 and 1993

  • Per Nafstad
  • Sven O. Samuelsen
  • Lorentz M. Irgens
  • Tor Bjerkedal
Article

DOI: 10.1023/A:1025395405101

Cite this article as:
Nafstad, P., Samuelsen, S.O., Irgens, L.M. et al. Eur J Epidemiol (2003) 18: 755. doi:10.1023/A:1025395405101

Abstract

Background: Fetal life events may affect the development of the immune and/or respiratory system and increase the risk of asthma and allergic diseases. The objective of this study was to test the hypothesis that pregnancy complications are associated with the risk of developing asthma in the offspring. Methods: The study population comprised Norwegian live births 1967–1993 (n = 1,548,429) linking the Medical Birth Registry of Norway (MBRN) (exposure variables) and the National Insurance Administration Register (NIAR) (outcome variables), which covers all Norwegians. The MBRN variables included pregnancy complications, pregnancy outcomes and diseases of the mother. The NIAR provided data on all Norwegians who had received cash benefit for treatment of asthma from 1967 to 1996 (n = 5938, 3.9/1000 persons). Results: In multiple logistic regression analysis, pregnancy complications (International Classification of Diseases (ICD)-8-codes: 630–634) were associated with the risk of asthma (odds ratio 1.82, 95% confidence interval: 1.67–1.98). This was also the case if analyses were performed in different strata according to year of birth, plurality, maternal atopy, geographical district of birth, and maternal education. Conclusions: Pregnancy complications may represent risk factors for the development of asthma in the offspring or express early signs of increased risk for developing the disease.

AsthmaEpidemiologyPregnancy complications

Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • Per Nafstad
    • 1
    • 2
  • Sven O. Samuelsen
    • 1
    • 3
  • Lorentz M. Irgens
    • 4
  • Tor Bjerkedal
    • 5
  1. 1.Division of Epidemiology, Norwegian Institute of Public HealthOsloNorway
  2. 2.Buskerud University CollegeDrammenNorway
  3. 3.University of OsloNorway
  4. 4.Medical Birth Registry of NorwayBergenNorway
  5. 5.National Insurance AdministrationOsloNorway