Table 3.

Independent predictors of mortality (stepwise multivariate analysis)

Variable	Odds ratio	95 % Confidence interval		P-value
LVEF ≤40 %
COPD	3.419	1.266	9.238	0.0153
Pre-operative IABP	3.335	1.258	8.839	0.0154
Pre-operative inotropes	13.595	2.852	64.808	0.0011
LVEF ≤30 %
Pre-operative renal failure	6.845	1.841	25.450	0.0041
Mitral valve surgery	5.244	1.290	21.322	0.0206

COPD chronic obstructive pulmonary disease, IABP intra-aortic balloon pump