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Marijuana use among northern California women before, during pregnancy

July 19, 2019

Bottom Line: An observational study of pregnant women in Northern California suggests marijuana use before and during pregnancy has increased over time. The study of nearly 277,000 women in Kaiser Permanente Northern California included 367,403 pregnancies from 2009 to 2017. The women reported marijuana use on questionnaires as part of standard prenatal care. The authors report marijuana use in the year before pregnancy increased from 6.8% of women in 2009 to 12.5% in 2017, and marijuana use during pregnancy increased from 1.95% to 3.38%. Daily use of marijuana in the year before pregnancy increased from 1.17% in 2009 to 3.05% in 2017, and daily use during pregnancy increased from 0.28% to 0.69%. A limitation of the study is that the results may not be generalizable to women outside of California or those without access to health care.

Authors: Kelly C. Young-Wolff, Ph.D., M.P.H., Kaiser Permanente Northern California, Oakland, and coauthors

(doi:10.1001/jamanetworkopen.2019.6471)

Editor's Note: The article includes conflict of interest and funding/support disclosures. Please see the article for additional information, including other authors, author contributions and affiliations, financial disclosures, funding and support, etc.
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About JAMA Network Open: JAMA Network Open is the new online-only open access general medical journal from the JAMA Network. Every Wednesday and Friday, the journal publishes peer-reviewed clinical research and commentary in more than 40 medical and health subject areas. Every article is free online from the day of publication.

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