Table 1.
Comparison of observed and predicted mortality using the four risk scores in clinically relevant risk groups
| Parsonnet score | EuroSCORE | ACC/AHA | UK CABG Bayes | |||||||||
| Risk group | n | Obs (%) | Exp (%) | n | Obs (%) | Exp (%) | n | Obs (%) | Exp (%) | n | Obs (%) | Exp (%) |
| 0–2.49% | 472 | 2 (0.4) | 2.8 (0.6) | 1061 | 6 (0.6) | 10.1 (0.9) | 2016 | 17 (0.8) | 18.7 (0.9) | 1798 | 13 (0.7) | 15.1 (0.8) |
| 2.5–4.99% | 371 | 1 (0.3) | 12.0 (3.2) | 478 | 5 (1.0) | 16.4 (3.4) | 130 | 5 (3.8) | 4.1 (3.1) | 246 | 4 (1.6) | 8.5 (3.4) |
| 5.0–9.99% | 348 | 5 (1.4) | 22.3 (6.4) | 344 | 12 (3.5) | 20.6 (6.0) | 68 | 7 (10.3) | 4.3 (6.3) | 122 | 7 (5.7) | 8.1 (6.7) |
| 10–19.99% | 294 | 11 (3.7) | 37.7 (12.8) | 24 | 3 (12.5) | 2.5 (10.4) | 9 | 1 (11.1) | 1.1 (12.3) | 40 | 4 (10.0) | 5.6 (14.0) |
| ≥20% | 30 | 1 (3.3) | 6.8 (22.8) | 0 | 0 | 17 | 2 (11.8) | 5.1 (29.7) | ||||
| Total | 1515 | 20 (1.3) | 81.6 (5.4) | 1907 | 26 (1.4) | 49.6 (2.6) | 2223 | 30 (1.3) | 28.2 (1.3) | 2223 | 30 (1.3) | 42.4 (1.9) |
ACC/AHA, American College of Cardiology/American Heart Association model; Exp, expected; Obs, observed; UK CABG, Society of Cardiothoracic Surgeons of Great Britain and Ireland coronary artery bypass graft surgery model.