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Risk of Adverse Infant Outcomes Associated with Maternal Tuberculosis in a Low Burden Setting: A Population-Based
Sylvia M LaCourse1, Sharon A Greene2, Elizabeth E Dawson-Hahn3
1Department of Medicine, Division of Allergy and Infectious Diseases, University of Washington, Seattle, WA 98104, USA.
Background:
Maternal tuberculosis (TB) may be associated with increased risk of adverse infant outcomes.
Study Design:
We examined the risk of low birth weight (LBW), small for gestational age (SGA), and preterm birth (<37 weeks) associated with maternal TB in a retrospective population-based Washington State cohort using linked infant birth certificate and maternal delivery hospitalization discharge records. We identified 134 women with births between 1987 and 2012 with TB-associated ICD-9 diagnosis codes at hospital delivery discharge and 536 randomly selected women without TB, frequency matched 4 : 1 on delivery year. Multinomial logistic regression analyses were performed to compare the risk of LBW, SGA, and preterm birth between infants born to mothers with and without TB.
Results:
Infants born to women with TB were 3.74 (aRR 95% CI 1.40-10.00) times as likely to be LBW and 1.96 (aRR 95% CI 0.91-4.22) as likely to be SGA compared to infants born to mothers without TB. Risk of prematurity was similar (aRR 1.01 95% CI 0.39-2.58).
Conclusion:
Maternal TB is associated with poor infant outcomes even in a low burden setting. A better understanding of the adverse infant outcomes associated with maternal TB, reflecting recent trends in US TB epidemiology, may inform potential targeted interventions in other low prevalence settings.
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