Table 4.

Multivariate Regression Analysis of Anemia as Independent Risk Factor.

Multivariate Analysis of Anemia on Any Complications, N = 473
Effect	Estimate	95% Confidence Limits		P
Anemia	3.136	1.608	6.116	.0008
ASA ≥3	3.849	1.556	9.52	.0035
Multivariate Analysis of Anemia on Mortality, N = 473
Effect	Estimate	95% Confidence Limits		P
Anemia	>999.999	<0.001	>999.999	.9092
Multivariate Analysis of Anemia on Pulmonary Complications, N = 473
Effect	Estimate	95% Confidence Limits		P
Anemia	9.745	2.551	37.227	.0009
Dependent functional status	4.106	1.258	13.402	.0193
Multivariate Analysis of Anemia on Intra-/Postoperative Transfusion, N = 473
Effect	Estimate	95% Confidence Limits		P
Anemia	3.063	1.502	6.245	.0021
Age >65	2.578	1.274	5.218	.0085
Weight loss	62.178	30.038	128.705	<.0001
Operative time >4 hours	6.218	3.016	12.822	<.0001
Multivariate Analysis of Anemia on Return to OR, N = 473
Effect	Estimate	95% Confidence Limits		P
Anemia	2.87	1.305	6.311	.0087
Alcohol	3.92	1.35	11.382	.012
Dyspnea	2.74	1.022	7.349	.0452
Steroid	3.834	1.077	13.654	.0381
Weight loss	7.905	1.634	38.239	.0102
Multivariate Analysis of Anemia on 30-Day Readmissions, N = 473
Effect	Estimate	95% Confidence Limits		P
Anemia	2.894	0.857	9.777	.0871
Diabetes	5.252	1.579	17.475	.0068
Weight loss	122.023	37.63	395.681	<.0001
Multivariate Analysis of Anemia on LOS >5, N = 473
Effect	Estimate	95% Confidence Limits		P
Anemia	2.863	1.758	4.662	<.0001
Obesity (BMI >30)	0.498	0.306	0.81	.005
ASA ≥3	2.886	1.72	4.842	<.0001
Neuromuscular injury	2.793	1.388	5.617	.004
Operative time > 4 hours	1.622	1.008	2.61	.0464

Abbreviations: ASA, American Society of Anesthesiologists; OR, operating room; LOS, length of stay; BMI, body mass index.