7629 Background: Platinum-based chemotherapy is currently recommended as the standard approach for pts with advanced NSCLC. However prospective clinical trials specifically designed for elderly pts demonstrating the P benefit are still lacking. Therefore, we conducted a phase III trial to determine whether the addition of P to single agent-chemotherapy for elderly NSCLC pts could improve survival. Methods: Eligibility criteria included; chemotherapy-naive; stage III/IV NSCLC; age=70 and PS 0–1. Pts were randomized to receive either DP or D with minimization method balancing site, age (=74/=75) and stage (III/IV), and both regimens were given every 4 weeks. DP comprised D (20 mg/m2) and P (25 mg/m2) iv on days 1, 8, 15. D comprised D (25 mg/m2) iv on the same schedule. Primary endpoint was overall survival (OS). The planned sample size was 115 pts in each arm to provide 80% power to detect 0.667 hazard ratio for DP to D in OS and 2.5% one-sided alpha. Results: Between Apr 2003 and Apr 2006, 126 pts were ra...