Table 5.

Cost Regression Results.

Parameter	Estimate	Rate Ratio	p-value
Intercept	10.660
Monitoring (Hct vs tHb)	0.143	1.15	<0.0001
Midwest vs South Geographic Area	0.196	1.22	<0.0001
Northeast vs South Geographic Area	−0.250	0.78	<0.0001
West vs South Geographic Area	0.431	1.54	<0.0001
RBC Transfusion	0.195	1.22	<0.0001
Major Teaching vs Non-teaching	0.123	1.13	<0.0001
Minor Teaching vs Non-teaching	−0.037	0.96	<0.0001
Age (in years)	−0.003	1.00	<0.0001
Pump (off vs on-pump)	−0.053	0.95	<0.0001
CABG only vs dual CABG & Valve	−0.256	0.77	<0.0001
Valve only vs dual CABG & Valve	−0.042	0.96	0.0006
Intravenous Iron Administration	0.119	1.13	<0.0001
Hemorrhage	0.343	1.41	<0.0001
Dehydration	0.115	1.12	<0.0001
Polycythemia vera	−0.005	1.00	0.9481
Burns	0.541	1.72	0.0056
Vomiting	−0.016	0.98	0.4888
Hypertension	−0.095	0.91	<0.0001
Trauma	0.086	1.09	0.0024
Renal Failure	0.330	1.39	<0.0001
Myocardial Infarction	0.103	1.11	<0.0001
Congestive Heart Failure	0.158	1.17	<0.0001
Peripheral Vascular Disease	0.049	1.05	<0.0001
Cerebrovascular Disease	0.038	1.04	<0.0001
Dementia	0.049	1.05	0.4333
Chronic Pulmonary Disease	0.047	1.05	<0.0001
Rheumatic Disease	0.029	1.03	0.1348
Peptic Ulcer	−0.003	1.00	0.9183
Mild Liver Disease	−0.011	0.99	0.7545
Diabetes without Chronic Complication	0.008	1.01	0.2874
Diabetes, with Chronic Complication	0.011	1.01	0.406
Hemiplegia or Paraplegia	0.189	1.21	<0.0001
Renal Disease	−0.014	0.99	0.1616
Malignancy	0.001	1.00	0.9305
Moderate or Severe Liver Disease	0.214	1.24	<0.0001
Metastatic Solid Tumor	0.023	1.02	0.6316
AIDS/HIV	0.021	1.02	0.7904
RBC Transfusion * monitoring interaction	−0.074	0.93	<0.0001
RBC Transfusion * hemorrhage interaction	−0.101	0.90	0.0024

RBC: red blood cells: CABG: coronary artery bypass graft; AIDS: acquired immune deficiency syndrome; HIV: human immunodeficiency virus.