Figure 1. Cumulative distribution of 1,083 Texas primary care physicians (PCPs) by the adjusted percentage of their male patients age 75 and older who underwent prostate specific antigen (PSA) testing ordered by the PCP in 2007 (top panel) and 2010 (bottom panel).

Only PCPs with at least 20 male patients 75+ in their panels in both years are included. The vertical lines denote the 95% confidence intervals of the estimates, derived from the multilevel models presented in Table 1. Dark lines indicate PCPs whose PSA testing rate was significantly different from the mean rate for all PCPs.