Cited by 96Prenatal Substance Exposure EffectsSmoking Behavior and CessationBirth, Development, and Health

A dose-response relationship between maternal smoking during late pregnancy and adult intelligence in male offspring

Mortensen, Erik Lykke, Michaelsen, Kim Fleischer, Sanders, Stephanie A., Reinisch, June Machover·2005·Paediatric and Perinatal Epidemiology

Abstract

An association between maternal smoking during pregnancy and cognitive and behavioural development has been observed in several studies, but potential effects of maternal smoking on offspring adult intelligence have not been investigated. The objective of the present study was to investigate a potential association between maternal smoking during pregnancy and offspring intelligence in young adulthood. Adult intelligence was assessed at the mean age of 18.7 years by a military draft board intelligence test (Borge Priens Prove) for 3044 singleton males from the Copenhagen Perinatal Cohort with information regarding maternal smoking during the third trimester coded into five categories (about 50% of the mothers were smokers). The following potential confounders were included as covariates in multivariable analyses: parental social status and education, single mother status, mother's height and age, number of pregnancies, and gestational age. In separate analyses, birthweight and length were also included as covariates. Maternal cigarette smoking during the third trimester, adjusted for the seven covariates, showed a negative association with offspring adult intelligence (P=0.0001). The mean difference between the no-smoking and the heaviest smoking category amounted to 0.41 standard deviation, corresponding to an IQ difference of 6.2 points [95% confidence interval 0.14, 0.68]. The association remained significant when further adjusted for birthweight and length (P=0.007). Both unadjusted and adjusted means suggested a dose-response relationship between maternal smoking during pregnancy and offspring adult intelligence. When subjects with missing data were excluded, essentially the same results were obtained in the reduced sample (n=1829). These results suggest that smoking during pregnancy may have long-term negative consequences on offspring adult intelligence.

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Crossref · 10.1111/j.1365-3016.2004.00622.x

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Authors
Mortensen, E. L., Michaelsen, K. F., Sanders, S. A., & Reinisch, J. M.
Affiliations
  • University of Copenhagen (DK)
  • Indiana University Bloomington (US)
  • Copenhagen University Hospital (DK)
Corresponding author
Mortensen, Erik Lykke
Venue
Paediatric and Perinatal Epidemiology
Publisher
Wiley
Published
2005-01
Volume
19
Issue
1
Pages
4-11
ISSN
  • 0269-5022 (ISSN-L)
  • 1365-3016
OpenAlex
W1998799313
Cited by
96
References
47
Citations by year
2026: 1 · 2024: 2 · 2023: 5 · 2022: 2 · 2021: 4 · 2020: 1 · 2019: 7 · 2018: 5 · 2017: 4 · 2016: 5 · 2015: 2 · 2014: 4 · 2013: 3 · 2012: 8
FWCI
6.35
Type
journal article
Language
en
Open access
closed
Locations
  • Paediatric and Perinatal Epidemiology (publishedVersion)
  • PubMed (publishedVersion)
  • Research at the University of Copenhagen (University of Copenhagen) (submittedVersion)
Funders
  • National Institutes of Health (5r01hd017655-04, 5r01hd020263-03, 5r01da005056-05)
  • National Institute on Drug Abuse (DA05056)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (HD-17655, HD20263)
Topics
  • Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Prenatal Substance Exposure Effects
  • Health Sciences › Medicine › Physiology › Smoking Behavior and Cessation
  • Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Birth, Development, and Health
Keywords
maternal smoking, prenatal tobacco exposure, adult intelligence, IQ, dose-response relationship, offspring cognitive development, birth weight, birth length
MeSH terms
Adolescent, Dose-Response Relationship, Drug, Female, Humans, Intelligence, Intelligence Tests, Male, Pregnancy, Pregnancy Trimester, Third, Prenatal Exposure Delayed Effects, Smoking, Cohort Studies

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