Fig. 4

Kaplan–Meier curves of the super-elderly group patients who did and did not receive chemotherapy. There were no significant differences in the median OS between those who received chemotherapy and those did not receive it in the super-elderly group; however, OS of patients who received chemotherapy tended to be longer (18.5 vs. 8.4 months; P = 0.33). b: Kaplan–Meier curves of the super-elderly patients with PNI > 35. There were also no significant differences in the median OS in super -elderly patients with PNI > 35; however, OS of patients who received chemotherapy tended to be longer (18.5 vs. 12.9 months; P = 0.64)