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. 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 2. County-level association between implementation of online prescription drug monitoring programs and hospital discharges related to prescription opioid (Panel a) and heroin overdoses (Panel b), across county levels of non-cancer pain conditions, 2003–2014.

Figure 2.

a NCPC = Non-cancer pain conditions. p25, p50 and p75 NCPC: level of NCPC at, respectively, the 25th, 50th, and 75th percentile of the distribution of the proportion of hospital discharges with NCPC diagnoses across the 13,860 county–year observations.