Table 6 Results of multi-factor line regression method for HBL

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