Table 2.

The variable assignment of multivariate logistic regression

Factors	Variables	Assignment
HF	Y	Yes = 1, no = 2
Age(y)	X1	≥ 70 = 1, < 70 = 2
Hypertension	X2	Yes = 1, no = 2
Anemia	X3	Yes = 1, no = 2
Hypoalbuminemia	X4	Yes = 1, no = 2
Duration of surgery(min)	X5	≥ 120 = 1, < 120 = 2