Figure 2
Comparative analysis of overall survival according to the pathological stage revealed that the survival periods in patients stage IA and stage I (IA+IB) were significantly longer than that in stage IIIB (A, IA vs. IIIB, P <0.026; B, I vs. IIIB, P <0.019, respectively). Comparative analysis of overall survival according to N-factors indicated that the survival in patients with N0 was significantly longer than that in N1-3 (C, P <0.0012). The survival in patients with N0-1 was also longer than that in N2-3 (D, P <0.0011).