Kaplan-Meier estimates for PFS and OS by aspirin and statin use. Patients receiving both statins and aspirin (n = 20) had a median PFS (A) and OS (B) of 6.1 years and 9.2 years compared with 1.6 years and 3.7 years for patients on neither medication (n = 221) (PFS P = .003; OS P = .05). The number of events per total number of patients is denoted in the box. The P value was derived from a log-rank test.