Eligible patients were 18 years of age or older and had newly diagnosed advanced (International Federation of Gynecology and Obstetrics [FIGO] stage III or IV), high-grade serous or endometrioid ovarian cancer, primary peritoneal cancer, or fallopian-tube cancer....The duration of investigator-assessed progression-free survival was significantly longer in the olaparib group than in the placebo group (median, 22.1 months vs. 16.6 months; hazard ratio for disease progression or death, 0.59; 95% CI, 0.49 to 0.72; P<0.001)