Table 5.

Adjusted odds ratio in patients with 1, 2, or 3 units of autologous blood removed compared to patients who had no autologous blood removed (Control group). Regressions used the adjusted intravenous fluids and cardiopulmonary bypass volume adjusted for the volume of albumin given (3:1 for 5% and 15:1 for 25% albumin). Any transfusion is sum of intraoperative and postoperative

Number of units of blood removed	Autologous blood removal without fluid replacement
	1 unit			2 units			3 units
	Odds ratio 95% CI		P	Odds ratio 95% CI		P	Odds ratio 95% CI		P
Factor
Calcium administration	2.34	(0.60, 9.16)	0.224	2.73	(0.94, 7.96)	0.066	undef	(0,)	0.990
Any vasopressor infusion	1.70	(0.87, 3.30)	0.118	2.23	(1.32, 3.77)	0.003	3.52	(1.61, 7.69)	0.002
Ephedrine administration	1.08	(0.76, 1.55)	0.663	1.54	(1.14, 2.07)	0.004	1.51	(1.02, 2.24)	0.039
Intraoperative transfusion
Red cell	0.36	(0.25, 0.52)	<0.001	0.25	(0.18, 0.34)	<0.001	0.09	(0.06, 0.14)	<0.001
Plasma	0.49	(0.35, 0.68)	<0.001	0.36	(0.27, 0.48)	<0.001	0.08	(0.05, 0.12)	<0.001
Platelet	0.46	(0.33, 0.63)	0.001	0.39	(0.30, 0.52)	<0.001	0.10	(0.07, 0.16)	<0.001
Cryoprecipitate	0.52	(0.29, 0.91)	0.023	0.73	(0.49, 1.08)	0.118	0.16	(0.09, 0.29)	<0.001
Any transfusions
Red cells (units)	0.41	(0.28, 0.60)	<0.001	0.24	(0.17, 0.33)	<0.001	0.09	(0.05, 0.14)	<0.001
Plasma (units)	0.48	(0.34, 0.68)	<0.001	0.35	(0.26, 0.48)	<0.001	0.08	(0.05, 0.12)	<0.001
Platelets (units)	0.43	(0.31, 0.61)	<0.001	0.38	(0.28, 0.51)	<0.001	0.11	(0.07, 0.16)	<0.001
Cryoprecipitate (units)	0.52	(0.28, 0.95)	0.033	0.83	(0.55, 1.27)	0.388	0.19	(0.10, 0.37)	<0.001
KDIGO stage 1 or worse	1.14	(0.84, 1.55)	0.398	0.99	(0.76, 1.29)	0.970	0.96	(0.66, 1.37)	0.810
KDIGO stage 2 or worse	0.64	(0.34, 1.25)	0.197	0.85	(0.51, 1.41)	0.528	0.72	(0.35, 1.51)	0.386

KDIGO – Kidney disease improving global outcome, within the first three postoperative days. Undef – undefined