Medical marijuana laws in 50 states: Investigating the relationship between state legalization of medical marijuana and marijuana use, abuse and dependence

Magdalena Cerda, Melanie Wall, Katherine M. Keyes, Sandro Galea, Deborah Hasin

Research output: Contribution to journalArticle

258 Citations (Scopus)

Abstract

Background: Marijuana is the most frequently used illicit substance in the United States. Little is known of the role that macro-level factors, including community norms and laws related to substance use, play in determining marijuana use, abuse and dependence. We tested the relationship between state-level legalization of medical marijuana and marijuana use, abuse, and dependence. Methods: We used the second wave of the National Epidemiologic Survey on Alcohol and Related Conditions (NESARC), a national survey of adults aged 18+ (n = 34,653). Selected analyses were replicated using the National Survey on Drug Use and Health (NSDUH), a yearly survey of ∼68,000 individuals aged 12+. We measured past-year cannabis use and DSM-IV abuse/dependence. Results: In NESARC, residents of states with medical marijuana laws had higher odds of marijuana use (OR: 1.92; 95% CI: 1.49-2.47) and marijuana abuse/dependence (OR: 1.81; 95% CI: 1.22-2.67) than residents of states without such laws. Marijuana abuse/dependence was not more prevalent among marijuana users in these states (OR: 1.03; 95% CI: 0.67-1.60), suggesting that the higher risk for marijuana abuse/dependence in these states was accounted for by higher rates of use. In NSDUH, states that legalized medical marijuana also had higher rates of marijuana use. Conclusions: States that legalized medical marijuana had higher rates of marijuana use. Future research needs to examine whether the association is causal, or is due to an underlying common cause, such as community norms supportive of the legalization of medical marijuana and of marijuana use.

Original languageEnglish (US)
Pages (from-to)22-27
Number of pages6
JournalDrug and Alcohol Dependence
Volume120
Issue number1-3
DOIs
StatePublished - Jan 1 2012
Externally publishedYes

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Medical Marijuana
Marijuana Abuse
Cannabis
Alcohols
Health
Diagnostic and Statistical Manual of Mental Disorders
Pharmaceutical Preparations
Surveys and Questionnaires

Keywords

  • Community norms
  • Legalization
  • Marijuana
  • Medical marijuana laws
  • Substance use disorders

ASJC Scopus subject areas

  • Psychiatry and Mental health
  • Toxicology
  • Pharmacology
  • Pharmacology (medical)

Cite this

Medical marijuana laws in 50 states : Investigating the relationship between state legalization of medical marijuana and marijuana use, abuse and dependence. / Cerda, Magdalena; Wall, Melanie; Keyes, Katherine M.; Galea, Sandro; Hasin, Deborah.

In: Drug and Alcohol Dependence, Vol. 120, No. 1-3, 01.01.2012, p. 22-27.

Research output: Contribution to journalArticle

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