Univariate analysis showed that there were statistically significant differences in the current smoker, ASA classification, hypertension, glucose, Alb (g/dL), WBC, leukocyte, RBC, clotting time, preventive tracheotomy, respirator use, operative time, anesthesia time, blood loss, and craniotomy between the two groups (P < 0.05), as shown in Table 1. This evidence concerns the gene ALB and hypertensive disorder.