TABLE 3.

Association between race and units of RBC transfusion during hospitalization

	All patients (n = 4951)	Excluding patients with GIBL (n = 4508)	Only patients with GIBL (n = 443)
African American a	−0.17 (−0.23, −0.11)**	−0.13 (−0.19, −0.07)**	−0.28 (−0.60, 0.03)
Other a	−0.08 (−0.21, 0.04)	−0.03 (−0.15, 0.10)	−0.33 (−0.85, 0.18)
Nadir Hb b	−0.68 (−0.72, −0.64)**	−0.60 (−0.64, −0.55)**	−0.88 (−1.1, −0.70)**
African American × Nadir Hb a	0.14 (0.09, 0.19)**	0.09 (0.04, 0.14)**	0.26 (0.05, 0.46)*
Other × Nadir Hb a	0.08 (−0.14, 0.18)	0.02 (−0.07, 0.13)	0.30 (−0.03, 0.64)

^a Referent category is white. Columns report estimated β coefficient and (95% CI).

^b Nadir Hb variable is mean centered. Models control for age, gender, and Charlson comorbidity index score and are limited to patients who received seven or less units of RBC's during hospitalization. **p < .01, *p < .05.