Results
A total of 900 patients were registered, and 813 eligible patients (median age, 48 [IQR, 41-56] years) were randomly assigned to the EP group (n = 407) or the EC-P group (n = 406) after the surgical procedure. Through a median follow-up of 93.6 (IQR, 60.9-114.1) months, the hazard ratio (HR) of DFS for EP vs EC-P was 0.82 (95% CI, 0.62-1.10; 5-year DFS, 86.0% vs 80.6%; noninferior 