Chemotherapy- and radiotherapy-naïve patients with histologically or cytologically diagnosis of stage IIIB or IV NSCLC and who were ≧ 70 years old with measurable or assessable disease were eligible for this trial. They had to have a life expectancy of at least 3 months. Additional entry criteria were as follows: (a) a performance status (PS) 0 to 2 on the Eastern Cooperative Oncology Group scale; (b) adequate function of bone marrow (leukocyte count ≧ 4,000/μL, absolute neutrophil count ≧ 2,000/μL, hemoglobin concentration ≧ 9.5 g/dL, platelet count ≧ 100,000/μL), kidney (serum creatinine ≦ 1.2 mg/dL), liver (total bilirubin ≦ 1.5 times the institutional upper limits of normal, transaminase of AST and ALT ≦ 2.5 times the institutional upper limits of normal).