Background-Substance use decreases in pregnancy but little prospective data are available on the rates of abstinence and relapse for specific substances. This study compared rates of abstinence in pregnancy and relapse postpartum for nicotine cigarettes, alcohol, marijuana, and cocaine.Methods-Data from 152 women drawn from a randomized controlled trial comparing psychological treatments for substance use in pregnancy were analyzed. Self-reports of substance use and urine for toxicology testing throughout pregnancy and 3-months, 12-months and 24-months post-delivery were collected. Multivariate Cox models were used to compare rates of abstinence and relapse across substances.Results-In pregnancy, 83% of all women achieved abstinence to at least one substance. The mean (SE) days to abstinence was 145.81 (9.17), 132.01 (6.17), 151.52 (6.24), and 148.91 (7.68) for cigarettes, alcohol, marijuana and cocaine, respectively. Participants were more likely to achieve abstinence from alcohol (HR 7.24 (95% CI 4.47-11.72), marijuana (HR 4.06; 95% CI 1.87-6.22), and cocaine (HR 3.41; 95% CI 2.53-6.51), than cigarettes. Postpartum, 80% of women © 2015 Published by Elsevier Ltd.Please address correspondence to Ariadna Forray at: 40 Temple Street, Suite 6B, New Haven, Connecticut, 06510 USA Fax: (203) 764-6766; ariadna.forray@yale.edu. Publisher's Disclaimer: This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
Contributors:Drs. Yonkers and Ruger were responsible for the conduct of the study. Drs. Forray, Yonkers, Lin and Mr. Merry were responsible for the statistical analyses and interpretation of the data. Dr. Forray was responsible for initial draft of the manuscript, with contributions from Dr. Yonkers and Mr. Merry. Drs. Forray, Yonkers, Ruger, Lin, and Mr. Merry were responsible for critical review and editing of the manuscript.
Conflict of Interest:In the past year, Dr. Yonkers received royalties from Up To Date, the content of which has no relationship to this project. Drs. Forray, Ruger, Lin and Mr. Merry have nothing to disclose. Conclusions-Pregnancy-related abstinence rates were high for all substances except cigarettes. Postpartum relapse was common, with cocaine using women being less likely to relapse after attaining abstinence compared to women using cigarettes, alcohol or marijuana.
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