Table 8.

Univariate logistic regression results for factors associated with receipt of a PRBC transfusion.^*

Variable	OR [95% CI]	p
Sex (female)	8.000 [2.978; 21.489]	<.0001
Hct baseline OR (%)	0.743 [0.645; 0.856]	<.0001
Hct CPB low (%)	0.512 [0.391; 0.670]	<.0001
Weight (kg)	0.936 [0.903; 0.971]	.0003
CPB prime (mL/100)†	0.505 [0.346; 0.739]	.0004
Age (yr)	1.058 [1.016; 1.102]	.0064
Pre-CPB volume (mL/100)†	1.095 [1.010; 1.188]	.0281

^*Probability modeled was PRBC use = yes (subject received PRBC).

^†This variable was divided by 100 before fitting the univariate model; therefore, a unit increase for this variable is an increase of 100 mL. OR, odds ratio; CI, confidence interval.