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  • Title: Does the timing of antibiotic exposure in pregnancy impact the risk of development of pediatric asthma?: A systematic review and meta-analysis.
    Author: Wang L, Hu X, Xiang C.
    Journal: J Asthma; 2023 May; 60(5):856-867. PubMed ID: 35849144.
    Abstract:
    OBJECTIVE: Maternal exposure to antibiotics has been linked to the development of pediatric asthma. However, the impact of the timing of exposure is unclear. We aimed to explore if the risk of pediatric asthma varies with trimester-specific exposure to antibiotics through a systematic review and meta-analysis. METHODS: PubMed, Embase, ScienceDirect, CENTRAL, and Google Scholar databases were searched for studies reporting an association between trimester-specific maternal exposure to antibiotics and risk of asthma in the offspring. RESULTS: Eleven studies were included. The total sample size of the included studies was 2,160,216. Meta-analysis revealed a statistically significant increased risk of asthma with first (RR: 1.13 95% CI: 1.10, 1.17 I2 = 59% p < 0.00001), second (RR: 1.14 95% CI: 1.07, 1.21 I2 = 92% p < 0.0001), and third (RR: 1.14 95% CI: 1.08, 1.20 I2=86% p < 0.00001) trimester exposure of antibiotics. The results were stable on sensitivity analysis. On subgroup analysis, we noted that the association for the first and second trimester was significant for studies on children >5 years but not for those on children <5 years of age. The certainty of evidence based on GRADE was low. CONCLUSION: Our results indicate that antibiotics administered during any trimester of pregnancy lead to an increased risk of childhood asthma. The overall risk is small and could be due to confounding. Further studies rigorously adjusting for important confounding variables are needed for stronger evidence.
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