Based on the univariate analysis, postoperative complications were significantly more commonly found in male patients, smokers, aged ≥ 65 years, and those with an American Society of Anesthesiologists (ASA) score ≥ 3, any comorbidity, preoperative albumin < 35 g/L, complications such as bleeding or pyloric obstruction due to the tumor, total gastrectomy, combined multi-organ resection, operation time ≥ 240 min, intraoperative blood loss ≥ 300 mL, lymph node metastasis, pathological TNM stage III, and perioperative blood transfusion (Table 3). The gene discussed is ALB; the disease is metastatic malignant neoplasm in the lymph nodes.