Impact of Bevacizumab on Clinical Outcomes in Patients With Platinum-resistant Relapsed Ovarian Cancer

Abstract

Background/Aim: Over the past several decades, new anti-cancer drugs have been developed for the treatment of epithelial ovarian cancer. The development of drugs has led to changes in improving the prognosis of ovarian cancer patients. One of these drugs, bevacizumab, is used for advanced or recurrent ovarian cancer. In this study, we aimed to evaluate survival improvement in patients with platinumresistant relapsed epithelial ovarian cancer (PR-ROC) after introduction of bevacizumab in real world experience. Patients and Methods: We retrospectively divided patients with PR-ROC into two groups: bevacizumab plus chemotherapy (BEV-CT group) and chemotherapy alone (CT group). Progressionfree survival (PFS), the primary endpoint, between two groups was compared to evaluate whether survival outcomes were improved. In addition, overall survival (OS) was also compared. Results: A total of 154 patients were included in the study: 57 and 97 patients in the BEV-CT and CT groups, respectively. OS was significantly longer in the BEV-CT group than in the CT group. The use of bevacizumab was identified as a favorable prognostic factor for OS. In a subgroup analysis confined to second-line chemotherapy, PFS and OS were statistically different between groups. More patients in