Analysis according to prognostic factors in patients (pts) treated with first-line bevacizumab (BEV) combined with paclitaxel (PAC) for HER2-negative metastatic breast cancer (mBC) in a routine oncology practice study.

Abstract

1077 Background: 1st-line BEV combined with weekly PAC significantly improves progression-free survival (PFS) and response rate (RR) vs PAC alone in HER2-negative mBC, as shown in E2100. We analyzed data from a German routine oncology practice study of 1st-line BEV–PAC according to prognostic factors. Methods: Pts who had received no prior chemotherapy for mBC received BEV–PAC according to the European label. Efficacy and safety were documented for up to 1 y (or until progression, death, or BEV discontinuation if earlier) with additional long-term follow-up. Efficacy was analyzed in clinically important subgroups. Results: Efficacy data were available for 818 pts. The median duration of follow-up was 11.4 mo. The composition of the pt population with respect to the subgroups below was generally similar to the population treated in E2100, except for a higher proportion of pts with visceral disease or metastases in <3 organs. RR was very similar across all subgroups analyzed. Differences in median PFS and OS were generally in line with the differing prognoses according to clinical characteristics. Conclusions: These data suggest that 1st-line BEV–PAC is typically associated with median PFS >9 mo in the real-life setting, irrespective of baseline characteristics. [Table: see text]