The overall efficacy population included 115 patients who received ≥ 1 dose of rucaparib and had a deleterious BRCA alteration…BRCA2 [n = 102]….The confirmed ORR for the IRR-evaluable population was 43.5% (95% CI, 31.0% to 56.7%; 27 of 62), and the confirmed ORR for the investigator-evaluable population was 50.8%...In the IRR- and investigator-evaluable populations, 64.5% and 63.1% of patients demonstrated a ≥ 30% reduction in target lesion size from baseline….Rucaparib has antitumor activity in patients with mCRPC and a deleterious BRCA alteration…