title: Maternal medications and environmental exposures as risk factors for gastroschisis.
abstract: In a case-control study of gastroschisis, we evaluated the risks associated with mother's first-trimester use of medications and with hobby or occupational exposures for 110 cases and 220 controls without a birth defect. Mothers of cases and controls were age-matched. For hobby or occupational exposures, we found significantly elevated risks for high levels of solvents (odds ratio (OR) = 3.8; 95% confidence interval (CI) = 1.6-9.2) and for colorants (OR = 2.3; 95% CI = 1.3-4.0). For medications, we found significantly elevated risks for two strong cyclooxygenase inhibitors, aspirin (OR = 4.7; 95% CI = 1.2-18.1) and ibuprofen (OR = 4.0; 95% CI = 1.0-16.0), but not for acetaminophen, a weak cyclooxygenase inhibitor. Periconceptional exposure to X rays was also associated with gastroschisis (OR = 2.5; 95% CI = 1.2-5.5), but exposure to antibiotics, antinauseants, sulfonamides, or oral contraceptives was not. We also found elevated risks for two decongestants, pseudoephedrine (OR = 2.1; 95% CI = 0.8-5.5) and phenylpropanolamine (OR = 10.0; 95% CI = 1.2-85.6). For the group of all decongestants, including also oxymetazoline and ephedrine, the risk was significantly elevated (OR = 2.4; 95% CI = 1.0-5.4). Controlling in multivariate analyses for several demographic and pregnancy variables associated with gastroschisis in a previous analysis [Torfs et al. (1994) Teratology 50: 44-53] did not substantially change the level or direction of the associations. Most of these associations are for vasoactive substances, which supports a vascular hypothesis for the pathogenesis of gastroschisis.
authors.affiliation: California Birth Defects Monitoring Program, Emeryville, California 94608-1811, USA.
authors.forename: C P
authors.initials: CP
authors.lastname: Torfs
authors.forename: E A
authors.initials: EA
authors.lastname: Katz
authors.forename: T F
authors.initials: TF
authors.lastname: Bateson
authors.forename: P K
authors.initials: PK
authors.lastname: Lam
authors.forename: C J
authors.initials: CJ
authors.lastname: Curry
mesh_terms: D000009:Abdominal Muscles / Q000002:abnormalities*; D000014:Abnormalities, Drug-Induced / Q000209:etiology*; D016022:Case-Control Studies; D004781:Environmental Exposure; D005260:Female; D006686:Hobbies; D006801:Humans; D007231:Infant, Newborn; D008431:Maternal-Fetal Exchange; D015999:Multivariate Analysis; D016273:Occupational Exposure; D011247:Pregnancy; D012307:Risk Factors; D011795:Surveys and Questionnaires