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  • Title: Maternal Asthma, Preterm Birth, and Risk of Bronchopulmonary Dysplasia.
    Author: Gage S, Kan P, Lee HC, Gould JB, Stevenson DK, Shaw GM, O'Brodovich HM.
    Journal: J Pediatr; 2015 Oct; 167(4):875-880.e1. PubMed ID: 26254835.
    Abstract:
    OBJECTIVE: To study the relationship between maternal asthma and the development of bronchopulmonary dysplasia (BPD). STUDY DESIGN: Using a large population-based California cohort, we investigated associations between maternal asthma and preterm birth subtype, as well as maternal asthma and BPD. We used data from 2007-2010 maternal delivery discharge records of 2 009 511 pregnancies and International Classification of Diseases, Ninth Revision codes. Preterm birth was defined as <37 weeks gestational age (GA), with subgroups of <28 weeks, 28-32 weeks, and 33-37 weeks GA, as well as preterm subtype, defined as spontaneous, medically indicated, or unknown. Linkage between the 2 California-wide datasets yielded 21 944 singleton preterm infants linked to their mother's records, allowing estimation of the risk of BPD in mothers with asthma and those without asthma. RESULTS: Maternal asthma was associated with increased odds (OR, 1.42; 95% CI, 1.38-1.46) of preterm birth at <37 weeks GA, with the greatest risk for 28-32 GA (aOR, 1.60; 95% CI, 1.47-1.74). Among 21 944 preterm infants, we did not observe an elevated risk for BPD in infants born to mothers with asthma (aOR, 1.03; 95% CI, 0.9-1.2). Stratification by maternal treatment with antenatal steroids revealed increased odds of BPD in infants whose mothers had asthma but did not receive antenatal steroids (aOR, 1.54; 95% CI, 1.15-2.06), but not in infants whose mothers had asthma and were treated with antenatal steroids (aOR, 0.85; 95% CI, 0.67-1.07). CONCLUSION: Asthma in mothers who did not receive antenatal steroid treatment is associated with an increased risk of BPD in their preterm infants.
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