The univariate analysis revealed that the following factors were significantly associated with prolonged LOS: age, sex, insurance type, ACCI score, hypertension, OP, PI, analgesics use, antibiotics use, psychotropic drug use, AKP, DBIL, TC, TGs, NLR, LMR, PLR, CREA, LDL-C, HDL-C, and ALB (p < 0.05) (Table 2). This evidence concerns the gene ALB and hypertensive disorder.