. 2022 Dec 15;23:1099. doi: 10.1186/s12891-022-06079-x

Table 6.

Results of multi-factor line regression method for HBL

Variable	Unstandardized β	Standardized β	t	P
age	3.344	0.086	1.069	0.288
BMI	− 118.216	0.644	−0.160	0.450
diabetes	− 264.662	−3.883	− 0.296	0.000*
hypertention	183.656	0.248	3.145	0.002
Fusion segment	25.422	0.051	0.580	0.563
Operation duration	20.961	0.073	0.705	0. 483
Postoperative Hct	−44.925	−0.614	−7.118	0.000*
subcutaneous fat^a	−3.473	−0.078	−0.973	0.334
dorsal extensor group^a	9.052	0.186	2.081	0.040
psoas^a	12.750	0.266	3.145	0.002

HBL hidden blood loss, a the thickness of the Variable *p < 0.001