A randomized, double-blind, comparison of radium-223 and placebo, in combination with abiraterone acetate and prednisolone, in castration-resistant metastatic prostate cancer: subgroup analysis of Japanese patients in the ERA 223 study

Background ERA 223 compared concurrent abiraterone acetate/prednisolone (AAP) plus radium-223 with AAP plus placebo in men with chemotherapy-naive asymptomatic or mildly symptomatic metastatic castration-resistant prostate cancer (mCRPC) and bone metastases. We report data from a subgroup of Japanese patients in ERA 223.