Fig. 2.
Histogram of the incidence of substance use disorder (SUD) in individual residency programs, depicting (1) total resident-years of training provided from 1975 to 2009 (black lines, with programs ordered according to this value), (2) absolute number of SUD cases during this period (blue lines), and (3) incidence rate for each program (per 1,000 resident-years, red dots). Data were analyzed for 162 programs; programs with <90 resident-years (n = 17) were not included in the analysis.