Aaron L Sarvet1, Melanie M Wall2, Katherine M Keyes3, Mark Olfson1, Magdalena Cerdá4, Deborah S Hasin5. 1. Department of Psychiatry, College of Physicians and Surgeons, Columbia University, 722 W 168(th) St., New York, NY 10032, USA; New York State Psychiatric Institute, 722 W 168th St., New York, NY 10032, USA. 2. Department of Psychiatry, College of Physicians and Surgeons, Columbia University, 722 W 168(th) St., New York, NY 10032, USA; New York State Psychiatric Institute, 722 W 168th St., New York, NY 10032, USA; Department of Biostatistics, Mailman School of Public Health, Columbia University, 722 W 168th St., New York, NY 10032, USA. 3. Department of Psychiatry, College of Physicians and Surgeons, Columbia University, 722 W 168(th) St., New York, NY 10032, USA; Department of Epidemiology, Mailman School of Public Health, Columbia University, 722 W 168th St., New York, NY 10032, USA. 4. Department of Emergency Medicine, University of California, Davis, 2315 Stockton Blvd., Sacramento, CA 95817, USA. 5. Department of Psychiatry, College of Physicians and Surgeons, Columbia University, 722 W 168(th) St., New York, NY 10032, USA; New York State Psychiatric Institute, 722 W 168th St., New York, NY 10032, USA; Department of Epidemiology, Mailman School of Public Health, Columbia University, 722 W 168th St., New York, NY 10032, USA. Electronic address: dsh2@cumc.columbia.edu.
Abstract
BACKGROUND: Self-medication with drugs or alcohol is commonly reported among adults with mood or anxiety disorders, and increases the risk of developing substance use disorders. Medical marijuana laws (MML) may be associated with greater acceptance of the therapeutic value of marijuana, leading individuals to self-medicate. METHODS: The study utilized data from Wave 2 of the National Epidemiologic Survey on Alcohol and Related Conditions (2004-2005). Participants were sampled from households in the general population and included adults with a mood or anxiety disorder in the past 12 months (n = 7418), and the subset of those who used marijuana and no other drug (n = 314). Weighted logistic regression models predicted the prevalence of self-medication with drugs in U.S. states with and without MML, adjusting for individual and state-level covariates. As a negative control, analyses were repeated for self-medication with alcohol. RESULTS: Overall, self-medication with drugs was 3.73 percentage points higher (95% confidence interval [CI]: 0.93-6.53) among those living in MML states (p = 0.01). For the subpopulation that only used marijuana, self-medication with drugs was 21.22 percentage points higher (95% CI: 3.91-38.53) among those living in MML states (p = 0.02). In contrast, self-medication with alcohol had nearly identical prevalence in MML and non-MML states, overall and for drinkers. CONCLUSIONS: Among adults with mood or anxiety disorders, living in a medical marijuana law state is associated with self-medication with marijuana. While additional research is needed to determine the reasons for this association, clinical screening for self-medication with marijuana may be particularly important in states with medical marijuana laws.
BACKGROUND: Self-medication with drugs or alcohol is commonly reported among adults with mood or anxiety disorders, and increases the risk of developing substance use disorders. Medical marijuana laws (MML) may be associated with greater acceptance of the therapeutic value of marijuana, leading individuals to self-medicate. METHODS: The study utilized data from Wave 2 of the National Epidemiologic Survey on Alcohol and Related Conditions (2004-2005). Participants were sampled from households in the general population and included adults with a mood or anxiety disorder in the past 12 months (n = 7418), and the subset of those who used marijuana and no other drug (n = 314). Weighted logistic regression models predicted the prevalence of self-medication with drugs in U.S. states with and without MML, adjusting for individual and state-level covariates. As a negative control, analyses were repeated for self-medication with alcohol. RESULTS: Overall, self-medication with drugs was 3.73 percentage points higher (95% confidence interval [CI]: 0.93-6.53) among those living in MML states (p = 0.01). For the subpopulation that only used marijuana, self-medication with drugs was 21.22 percentage points higher (95% CI: 3.91-38.53) among those living in MML states (p = 0.02). In contrast, self-medication with alcohol had nearly identical prevalence in MML and non-MML states, overall and for drinkers. CONCLUSIONS: Among adults with mood or anxiety disorders, living in a medical marijuana law state is associated with self-medication with marijuana. While additional research is needed to determine the reasons for this association, clinical screening for self-medication with marijuana may be particularly important in states with medical marijuana laws.
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