| Odds ratio (95% CI) | ||
| Age (years) | 1.04 (1.03 to 1.05) | |
| Female sex | 1.8 (1.5 to 2.3) | |
| Respiratory disease | 1.6 (1.3 to 2.0) | |
| Peripheral vascular disease | 1.7 (1.3 to 2.2) | |
| Renal dysfunction | 3.9 (2.9 to 5.2) | |
| Endocarditis | 5.1 (2.5 to 10.6) | |
| Ejection fraction <30% | 2.4 (1.9 to 3.2) | |
| Previous cardiac surgery | 2.6 (1.9 to 3.6) | |
| Urgent surgery | 2.4 (2.0 to 3.0) | |
| Emergency surgery | 4.3 (2.9 to 6.5) | |
| Cardiogenic shock | 4.9 (3.1 to 7.8) | |
| Combined CABG and valve surgery | 2.3 (1.8 to 2.9) | |
| Other cardiac surgery | 2.6 (2.0 to 3.4) |
CABG, coronary artery bypass grafting.
Calculation of predicted risk using patient data and logistic regression coefficients:
Calculate the odds of in-hospital death = exp (−7.4554 + [0.0393× age (continuous variable)] + [0.6108× female sex] + [0.4996× respiratory disease] + [0.5305× peripheral vascular disease] + [1.3592× renal dysfunction] + [1.6313× endocarditis] + [0.8915× ejection fraction <30%] + [0.9731× previous cardiac surgery] + [0.8878× urgent surgery] + [1.4697× emergency surgery] + [1.5900× cardiogenic shock] + [0.8282× combined CABG and valve surgery] + [0.9629× other cardiac surgery]).
Predicted risk of in-hospital mortality as a percentage = [odds/(1 + odds)] ×100.