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Obstetrics & Gynecology 1997;89:674-678
© 1997 by The American College of Obstetricians and Gynecologists
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Articles

Adverse perinatal outcome in parturients who use crack cocaine

ME Sprauve, MK Lindsay, S Herbert, and W Graves

OBJECTIVE: To determine the risk of adverse pregnancy outcome among crack cocaine users in a large homogeneous prenatal population with objective documentation of drug use. METHODS: A retrospective cohort study was performed on a population of inner-city women who were offered routine voluntary urine drug screening and who delivered between January and December 1992 at a large county hospital. The study population consisted of 483 users (positive drug screens) and 3158 non-users (negative drug screens). Univariate analysis and multiple logistic regression were used to identify the relation between crack cocaine use and adverse perinatal outcome. RESULTS: Users were significantly more likely than nonusers to deliver low birth weight (LBW) infants (31.3% versus 14.9%; crude odds ratio [OR] 2.6; 95% confidence interval [CI] 2.1, 3.2), growth-restricted infants (29.0% versus 13.0%; crude OR 2.7; 95% CI 2.2, 3.4), and preterm infants (28.2% versus 17.1%; crude OR 1.9; 95% CI 1.5, 2.4). In addition, users were more likely to have abruptions (3.3% versus 1.1%; crude OR 3.0; 95% CI 1.6, 5.6) and infants with low 5-minute Apgar scores (7.9% versus 4.5%; crude OR 1.8; 95% CI 1.2, 2.7). After adjusting for confounders (including alcohol use and smoking), only the risks of LBW and fetal growth restriction (FGR) remained significant, with adjusted OR 1.6 (95% CI 1.03, 2.4) and adjusted OR 1.7 (95% CI 1.2, 2.3), respectively. Although there was no significant difference in the rate of low 5-minute Apgar scores between users and non-users after controlling for confounders, users with a positive urine drug screen within 1 week of delivery were significantly more likely than non-users to deliver infants with low 5-minute Apgar scores: crude OR 2.4; adjusted OR 2.0 (95% CI 1.1, 3.7). CONCLUSION: In this inner-city population, crack cocaine use is associated with adverse pregnancy outcomes, as noted by increased risks of LBW and FGR.


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