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Wacker, Evelin; Navarro, Ana; Meister, Reinhard; Padberg, Stephanie; Weber-Schoendorfer, Corinna; Schaefer, Christof
Pharmacoepidemiology and drug safety, 04/2015, Letnik: 24, Številka: 4Journal Article
Purpose The results of observational cohort studies on drug effects on pregnancy outcome may depend among others on suitable comparison cohorts. The aim of this investigation was to compare two distinct definitions of maternal exposure status for comparison cohorts. Methods We performed an observational cohort study of prospectively ascertained pregnant women who spontaneously contacted the Teratology Information Service (TIS) Berlin for drug risk consultation. The only exclusion criteria were exposures to established teratogens and/or fetotoxicants. Pregnancy outcomes of 3250 women with this “average drug exposure” were compared with 546 non‐exposed or insignificantly exposed pregnancies. Results Neither the rate of major birth defects (3.0%; aOR 1.62; 95% CI 0.8–3.3) nor the risk of spontaneous abortion (16.0%; aHR 1.20; 95% CI 0.8–1.7) was significantly increased after average drug exposure, whereas the rate of electively terminated pregnancies was higher (11.1%; aHR 2.05; 95% CI 1.2–3.4). There were no differences in the risk of preterm birth (9.9%; aOR 1.38; 95% CI 0.9–2.0) and infants' birth weight (p = 0.60). Conclusions This study does not provide evidence for an increased risk of adverse pregnancy outcome after average drug exposure during pregnancy. Therefore, comparison cohorts with average drug exposure are appropriate for studies on potential teratogens or fetotoxicants based on observational data collected by TIS. Copyright © 2015 John Wiley & Sons, Ltd.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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