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Table 4 Multiple regression analysis model about post-operation haematocrit and haematocrit decline

From: Predictors of haematocrit in lumbar fusion for lumbar disc herniation: a surgical assessment

  

Unstandardized coefficient

Standardized coefficient

VIF

R square

Hct (post)

Constant

11.181

  

0.53

Hct(pre)

0.504

0.509

1.512

PD

−0.004

−0.231

1.266

EBV(mL)

0.001

0.213

1.484

EBL(intra)

−0.006

−0.434

2.573

Units of ABT

1.016

0.414

2.683

Age

−0.035

−0.096

1.126

Hct Decline

Constant

−13.690

  

0.42

Hct(pre)

0.513

0.576

1.702

PD

0.004

0.256

1.266

Gender

−1.760

−0.216

1.602

EBL(intra)

0.006

0.482

2.642

Units of ABT

−0.996

−0.451

2.702

BMI index

−0.153

−0.123

1.080

Age

0.040

0.121

1.138

  1. VIF variance inflation factor, Hct (post) post-operative haematocrit, Hct decline decline of haematocrit, Hct (pre) pre-operative haematocrit, PD post-operative drainage, EBV (mL) estimated blood volume in millilitres, EBL (intra) estimated intra-operative blood loss, Units of ABT units of allogenic red blood cell transfusion