Hall KE, et al. - Researchers gauged the co-occurrence of cannabis and mental health diagnostic coding in Colorado Emergency Department (ED) discharges and replicated the study in a subpopulation of ED visits where cannabis involvement and psychiatric diagnosis were confirmed through medical review. Compared to those without cannabis, the prevalence of mental health conditions in ED visits with cannabis-associated diagnostic codes was higher in Colorado. Authors noted a significant increase in the statewide rates of ED visits associated with both cannabis and mental health from 2012 to 2014 from 224.5 to 268.4 per 100,000.