The NESARC and NSDUH state-level analyses used linear regression (SAS 9.2 Proc GLM) of state-level prevalence estimates (n=50) of the outcomes regressed on an indicator of whether the state had a law legalizing medical marijuana use, controlling for state-level covariates. Regression-adjusted mean prevalence and 95% confidence intervals are presented for comparison between states with and without medical marijuana laws.
