Table 3.

Predictive model performance for red blood cell transfusion

Model 1	Transfusion through 24 hours		Ever transfused
	C-statistic	Pseudo R 2	C-statistic	Pseudo R 2
Administrative data2	0.756	0.196	0.738	0.176
(a) + Admission Hemoglobin	0.919	0.522	0.856	0.410
(b) + Severity of Illness	0.922	0.526	0.862	0.418
(c) + Prior RBC Transfusion	0.924	0.530	0.867	0.426
(d) + Initial Hospital Location	0.927	0.537	0.870	0.432
(e) + Hospital	0.928	0.542	0.872	0.437

Footnotes

¹Model performance in this table is measured using the area under the receiver operator characteristic curve (C-statistic) and Nagelkerke’s Pseudo-R².

²Administrative data includes age, sex, comorbid conditions (COPS2), admission type (emergency or elective), and admission diagnosis.