CRP and neoplasm: After the univariate analysis on various clinical factors, the results are suggested in Table 2: including age, sex, smoking, ASA score, comorbidities, tumor location, tumor T stage, previous abdominal surgery history, neoadjuvant treatment, preoperative hemoglobin and CRP levels, preoperative lymphocyte count, surgical approach, anastomosis, stoma, operation time, intraoperative bleeding, preoperative PNI, and PNI on POD 1.