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Research Letter
January 10, 2017

Use of Marijuana for Medical Purposes Among Adults in the United States

Author Affiliations
  • 1National Institute on Drug Abuse, Bethesda, Maryland
  • 2Substance Abuse and Mental Health Services Administration, Rockville, Maryland
  • 3Office of the Assistant Secretary for Planning and Evaluation, US Department of Health and Human Services, Washington, DC
JAMA. 2017;317(2):209-211. doi:10.1001/jama.2016.18900

By 2014, 23 states and the District of Columbia had legalized medical marijuana use, suggesting a need for information about national rates of marijuana use for medical purposes.1 Although 17% of past-year marijuana users reported use for medical purposes in states with medical marijuana legalization,2 physicians might recommend medical marijuana use to patients regardless of their residing states.3 Therefore, we examined differences between medical and nonmedical marijuana users across all US states.

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