Operative mortality
| Years | Age | Number of patients | Operative mortality (%) | |
| CABG | ||||
| Rahimtoolaet al 16 | 1974-88 | 7026 | 2.1 | |
| Davis et al 17 | 1974-79 | 8213 | 2.9 | |
| Alexander et al 18 | 1994-97 | < 80 years | 60161 | 3.0 |
| ⩾ 80 years | 4306 | 8.1 | ||
| CABG+AVR | ||||
| Alexander et al 18 | 1994-97 | < 80 years | 1690 | 7.9 |
| ⩾ 80 years | 345 | 10.6 | ||
| Cohn et al 19 | 1972-97 | 365 | 6.0 | |
AVR, aortic valve replacement; CABG, coronary artery bypass surgery.