Combination of statin/vitamin D and metastatic castration-resistant prostate cancer (mCRPC): A post-hoc analysis of two randomized clinical trials.

Abstract

6617 Background: Retrospective database studies have suggested that statins and vitamin D have a positive impact on prostate cancer survival and specifically in mCRPC patients (pt). Methods: We conducted a post-hoc analysis of individual pt data of mCRPC pts treated with abiraterone (AA) and/or Prednisone (P) on two randomized phase III clinical trials COU -AA-301 and COU-AA-302 to analyze the impact of statins and vitamin D in overall survival (OS). Statistical analyses were performed using the Kaplan Meier method and Independent predictors were investigated using Cox regression analysis. This study, carried out under YODA Project #2016-1136, used data obtained from the Yale University Open Data Access Project. Results: These two studies included 2280 patients (1340 treated with AA/P and 640 with P). Use of Statin + vitamin D was associated with a 38% reduction in mortality in the postdocetaxel setting and 32% in the predocetaxel setting in patients treated with abiraterone (Table 1 and 2). No significant reduction in the rate of skeletal-related events was seen in patients treated with vitamin D or statins. Conclusions: To our knowledge this is the first report suggesting the impact of vitamin D+statin in mCPRC treated with abiraterone. The potential benefits of vitamin D do not seem to be secondary to concomitant statin use in this population. Further studies are needed to confirm these results. [Table: see text][Table: see text]