Table 4.

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

		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

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