Analysis of risk factors and establishment of prediction model for lower extremity deep vein thrombosis after lumbar fusion surgery

Table 4 Logistic regression model coefficients: training set

	Coefficient	The standard error of the coefficient estimate	z-value	P-value
Constant	−8.154	1.812	−4.500	< 0.001
Weakened lower extremity muscle strength	1.918	0.488	3.927	< 0.001
Intraoperative blood loss	0.018	0.006	2.822	0.005
Walking impairment	1.043	0.506	2.059	0.039
Venous reflux/ Varicose veins	1.427	0.494	2.892	0.004

ISSN: 1471-2482