Persistent effects of maternal smoking during pregnancy on lung function and asthma in adolescents

Hollams, Elysia M., De Klerk, Nicholas H., Holt, Patrick G. and Sly, Peter D. (2014) Persistent effects of maternal smoking during pregnancy on lung function and asthma in adolescents. American Journal of Respiratory and Critical Care Medicine, 189 4: 401-407. doi:10.1164/rccm.201302-0323OC

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Author Hollams, Elysia M.
De Klerk, Nicholas H.
Holt, Patrick G.
Sly, Peter D.
Title Persistent effects of maternal smoking during pregnancy on lung function and asthma in adolescents
Journal name American Journal of Respiratory and Critical Care Medicine   Check publisher's open access policy
ISSN 1073-449X
1535-4970
Publication date 2014-02-15
Year available 2014
Sub-type Article (original research)
DOI 10.1164/rccm.201302-0323OC
Open Access Status File (Author Post-print)
Volume 189
Issue 4
Start page 401
End page 407
Total pages 7
Place of publication New York, United States
Publisher American Thoracic Society
Language eng
Formatted abstract
Rationale: The extent to which maternal smoking in pregnancy (MSP) has persisting effects on respiratory health remains uncertain and the mechanisms involved are not fully understood. Alterations in immune function have been proposed as a mechanism contributing to respiratory disease.

Objectives: To determine whether MSP increases risk of respiratory disorders in adolescence and, if so, whether this occurs by decreased lung function, altered immune function, and/or enhanced atopy.

Methods: Data on spirometry, bronchial responsiveness, respiratory symptoms, total and allergen-specific IgE and IgG4, immune function, and inflammatory markers were obtained from 1,129 participants in the 14-year follow-up of the Western Australian Pregnancy (Raine) Cohort and related to MSP using regression analyses.

Measurements and Main Results: MSP was reported for 21.0% (237 of 1,129) of participants, with 92 (8.1%) reporting current smoking.MSP was associated with some altered immune measures at age 14. MSP was strongly related to reduced lung function in current nonsmokers (forced expiratory flow midexpiratory phase [FEF25-75%], P = 0.016; FEV1/FVC, P = 0.009) and increased risk for current asthma (odds ratio [OR], 1.84; 95% confidence interval [CI], 1.16-2.92; P = 0.01), current wheeze (OR, 1.77; 95% CI, 1.14-2.75; P = 0.011), and exercise-induced wheeze (OR, 2.29; 95% CI, 1.37-3.85; P = 0.002), but not for bronchial hyperresponsiveness or atopy. Adjustment for immune measures and/or lung function in multivariate models did not greatly alter these associations and the increased risks for asthma and wheeze were not modified by sex, atopy, or maternal history of asthma or atopy.

Conclusions: MSP increases risk of asthma and wheezing in adolescence; mechanisms go beyond reducing lung function and exclude altering immune function or enhancing atopy.
Keyword Atopy
Immune function
Bronchial hyperresponsiveness
Raine study
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2015 Collection
Queensland Children's Medical Research Institute Publications
 
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