Table 6.

Results of binary regression analysis with transfusion while in hospital, (yes/no) as the binary outcome.

Variable	P value	OR	95% CI	Interpretation
Female gender	.002	6.8	2.1-22.3	Females are 6.8 times more likely than males to receive a transfusion
Preoperative Hb	<.001	0.12	0.07-0.21	With an increase in Hb of 1 g/dL, a patient is 8.3 times less likely to receive a transfusion (ie, 1/0.12)
Age	.002	1.09	1.03-1.15	With an increase in age of 1 y, a patient is 1.09 times more likely to receive a transfusion
BMI	<.001	0.86	0.80-0.93	With an increase in BMI of 1 kg/m2, a patient is 1.16 times less likely to be transfused (ie, 1/0.86)
Blood loss at POD1 in deciliters	.001	1.19	1.08-1.31	With an increase in POD1 loss of 100 mL, a patient is 1.2 times more likely to receive a transfusion
Blood loss at POD2 in deciliters	<.001	1.56	1.36-1.78	With an increase in POD2 loss of 100 mL, a patient is 1.6 times more likely to receive a transfusion
ASA grade	.2	0.52	0.18-1.45	No influence on odds of transfusion

CI, confidence interval.