Prior abiraterone or enzalutamide exposure trended toward an association for worse outcomes, including PSA response (odds ratio [OR], 2.41; 95% CI, 0.74 to 7.93; P = .146), PFS (hazard ratio [HR], 1.17; 95% CI, 0.63 to 2.14; P = .620), and OS (HR, 1.51; 95% CI, 0.71 to 3.24; P = .284); however, these associations did not reach statistical significance ( Tables 2 and 3 and Data Supplement).
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Genetic Alterations Detected in Cell-Free DNA Are Associated With Enzalutamide and Abiraterone Resistance in Castration-Resistant Prostate Cancer.
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