The presence/absence of PCF, weight, anemia status (Hb <12.5 g/dl), renal dysfunction status (GFR <90 mL/min/1.73m2), malnutrition status (Albumin <3.5 g/dl), and marginal involvement status was extracted from postoperative medical records. This evidence concerns the gene GSTM1 and Abnormal renal physiology.