No significant differences were observed among other factors, including body mass index, preoperative hemoglobin, total protein, serum albumin, NRS2002 score, ASA, preoperative cardiopulmonary disease, comorbid diabetes, history of previous abdominal surgery, treatment, surgical approach, lymph node dissection, and intraoperative blood transfusion. The gene discussed is ALB; the disease is cor pulmonale.