Table 3. Alternate – Absolute Risk Reduction and Odds Ratio.

	Number of models retaining variable	OR	Absolute Risk Difference	Significant at α =0.05
ASA ≥3	1,000	18.96 (9.63, 61.39)	0.40% (0.30, 0.50)	*
Emergent Procedure	1,000	9.34 (5.69, 14.52)	1.00% (0.61, 1.40)	*
Asthma	969	0.13 (0.00, 0.52)	−0.17% (−0.23, −0.09)
Renal Failure	936	2.19 (1.28, 3.39)	0.18% (0.04, 0.33)	*
COPD	907	2.16 (1.24, 3.54)	0.18% (0.04, 0.36)	*
Male	837	1.65 (1.04, 2.55)	0.09% (0.01, 0.16)	*
Number of anesthetics during admission	797	1.37 (1.10, 1.61)	0.05% (0.02, 0.07)	*
CAD	471	-	-
Hypertension	356	-	-
CHF	245	-	-
Age	223	-	-
Diabetes	175	-	-

ASA = American Society of Anesthesiologists; CAD = coronary artery disease; CHF = congestive heart failure; COPD = chronic obstructive pulmonary disease; OR = odds ratio.