RT Journal Article T1 Maintenance olaparib plus bevacizumab in patients with newly diagnosed advanced high-grade ovarian cancer: Main analysis of second progression-free survival in the phase III PAOLA-1/ENGOT-ov25 trial. A1 González-Martín, Antonio A1 Desauw, Christophe A1 Heitz, Florian A1 Cropet, Claire A1 Gargiulo, Piera A1 Berger, Regina A1 Ochi, Hiroyuki A1 Vergote, Ignace A1 Colombo, Nicoletta A1 Mirza, Mansoor R A1 Tazi, Youssef A1 Canzler, Ulrich A1 Zamagni, Claudio A1 Guerra-Alia, Eva M A1 Levaché, Charles B A1 Marmé, Frederik A1 Bazan, Fernando A1 de Gregorio, Nikolaus A1 Dohollou, Nadine A1 Fasching, Peter A A1 Scambia, Giovanni A1 Rubio-Pérez, María J A1 Milenkova, Tsveta A1 Costan, Cristina A1 Pautier, Patricia A1 Ray-Coquard, Isabelle A1 PAOLA1/ENGOT-ov25 investigators, K1 Antiangiogenic agent K1 Bevacizumab K1 Olaparib K1 Ovarian cancer K1 PARP inhibitor K1 Second progression-free survival AB PAOLA-1/ENGOT-ov25 (NCT02477644) demonstrated a significant progression-free survival (PFS) benefit with maintenance olaparib plus bevacizumab versus placebo plus bevacizumab in newly diagnosed, advanced ovarian cancer. We report the prespecified main second progression-free survival (PFS2) analysis for PAOLA-1. This randomised, double-blind, phase III trial was conducted in 11 countries. Eligible patients had newly diagnosed, advanced, high-grade ovarian cancer and were in response after first-line platinum-based chemotherapy plus bevacizumab. Patients were randomised 2:1 to olaparib (300 mg twice daily) or placebo for up to 24 months; all patients received bevacizumab (15 mg/kg every 3 weeks) for up to 15 months. Primary PFS end-point was reported previously. Time from randomisation to second disease progression or death was a key secondary end-point included in the hierarchical-testing procedure. After a median follow-up of 35.5 months and 36.5 months, respectively, median PFS2 was 36.5 months (olaparib plus bevacizumab) and 32.6 months (placebo plus bevacizumab), hazard ratio 0.78; 95% confidence interval (CI) 0.64-0.95; P = 0.0125. Median time to second subsequent therapy or death was 38.2 months (olaparib plus bevacizumab) and 31.5 months (placebo plus bevacizumab), hazard ratio 0.78; 95% CI 0.64-0.95; P = 0.0115. Seventy-two (27%) patients in the placebo plus bevacizumab group received a poly(ADP-ribose) polymerase inhibitor as first subsequent therapy. No new safety signals were observed for olaparib plus bevacizumab. In newly diagnosed, advanced ovarian cancer, maintenance olaparib plus bevacizumab provided continued benefit beyond first progression, with a significant PFS2 improvement and a time to second subsequent therapy or death delay versus placebo plus bevacizumab. YR 2022 FD 2022-09-05 LK http://hdl.handle.net/10668/22178 UL http://hdl.handle.net/10668/22178 LA en DS RISalud RD Apr 14, 2025