Figure 2. State-Specific Association Between Medical and Adult-Use Marijuana Laws and Medicaid-Covered Opioid Prescribing Rate.

Analysis of the CMS State Drug Utilization Data, 2011-2016.¹⁹ Opioid prescribing rate was measured by the number of Medicaid-covered prescriptions for opioids on a quarterly, per-1000-Medicaid-enrollees basis and was population-weighted. Error bars indicate 95% CIs clustered at the state level. Dots indicate prescribing rates. Rates and 95% CIs are also presented in eTable 4 in the Supplement. AK indicates Alaska; CO, Colorado; CT, Connecticut; DE, Delaware; IL, Illinois; MA, Massachusetts; MD, Maryland; MN, Minnesota; NH, New Hampshire; NY, New York; OR, Oregon; WA, Washington.