Prescription Drug Monitoring Programs and Opioid Overdoses: Exploring Sources of Heterogeneity

. Author manuscript; available in PMC: 2020 Mar 1.

Published in final edited form as: Epidemiology. 2019 Mar;30(2):212–220. doi: 10.1097/EDE.0000000000000950

Figure 1. County-level association between implementation of online prescription drug monitoring programs and hospital discharges related to overdoses of prescription opioids (Panel a) and heroin (Panel b), 2003–2014.