ALB and chronic kidney disease: In multivariate analyses, advanced age (p< 0.001), gender (p < 0.001), tumor stage (p < 0.001), elevated CA19-9 values (p < 0.001), decreased albumin levels (p < 0.001), and chronic kidney disease stage 2 (GFR < 90 mL/min/1.37 m2; p = 0.042) were all identified as independent prognostic markers for survival.