Table 4.

Final model for predicting the need for perioperative blood transfusion in cardiac surgery.

	β	Standard Error	OR	CI 95%	p Value
Hb preoperative
≥14 g/dL			1		<0.001
13–13.9 g/dL	0.74	0.17	2.11	1.50; 2.97	<0.001
12–12.9 g/dL	1.58	0.19	4.88	3.34; 7.10	<0.001
11–11.9 g/dL	2.38	0.25	10.89	6.69; 17.72	<0.001
<11 g/dL	3.94	0.43	51.41	21.97; 120.27	<0.001
Surgery
One procedure			1
Combined surgery	1.38	0.30	3.97	(2.19; 7.17)	<0.001
BMI
BMI <30			1
BMI ≥30	0.38	0.14	1.46	(1.10; 1.93)	<0.001
Sex
Men			1
Women	0.51	0.15	1.67	(1.24; 2.24)	0.001
Age
<60			1
≥60	0.31	0.15	1.37	(1.02; 1.83)	0.033
Constant	−1.46	0.18	0.23		<0.001