ALB and diabetes mellitus: Meanwhile, we conducted Kaplan–Meier survival analysis to these four preoperative factors, and the survival curve showed that patients with lower serum albumin (≤35 g/L), higher CA19-9 (≥37 U/ml), lower lymphocyte count (<1.5 × 109/L), or diabetes had poorer prognosis and shorter median survival time (Figure S2).