[Retracted] Analysis of Related Influencing Factors of Deep Vein Thrombosis after Lumbar Internal Fixation and Treatment Strategy

Table 2

Assignment for multivariate analysis of factors.

Factors	Variable	Assignment
Age	X1	<56 = 0, 56∼65 = 1, >65 = 2
BMI	X2	<18.5 = 0, 18.5∼23.9 = 1, 24∼27.9 = 2, >28 = 3
Intraoperative blood transfusion	X3	No = 0, yes = 1
Operation time	X4	<2=0, 2∼3=1, >3 = 2
Bed time	X5	<3=0, 3∼5=1, >5 = 2