Kaplan–Meier estimates of overall survival according to each prognostic factors. (a) age (b) gastrectomy (c) histological type (d) PS (e) Alb (f) ALP (g) creatinine (h) NLR. OS, overall survival; CI, confidence interval; PS, performance status; Alb, albumin; ALP, alkaline phosphatase; NLR, neutrophil-to-lymphocyte ratio.