In order to gain insight into the contribution of each clinical variable to AL, the importance of each clinical variable was calculated through feature importance analysis, and the results showed that hypertension, diabetes, BMI, Brinkman index, albumin, hemoglobin, tumor size, tumorous obstruction, ASA score, and operation time were the ten most important features in the RF model (Figure 2). This evidence concerns the gene ALB and hypertensive disorder.