In this study, as the variables did not conform to a normal distribution, Spearman correlation analysis was used to determine the relationship between sufentanil consumption 48 h postoperatively and other factors, including age, BMI, operation time, blood loss, intraoperative infusion of RBCs and FFP, pain at rest and during movement after surgery (day 1 and day 2), tumor size and laboratory data (including platelet count, prothrombin time, and indicators of liver and kidney function). This evidence concerns the gene F2 and neoplasm.