Table 3.
Definition of the 4 risk groups according to total score and comparisons in terms of clinically relevant variables.
| Class 1 | Class 2 | Class 3 | Class 4 | P | |
|---|---|---|---|---|---|
| Total score range | 0–5 | 7–131 | 14–19 | ≥20 | |
|
| |||||
| Mean predicted mortality | 1 ± 0.7% | 3.7 ± 1.6% | 12 ± 5% | 43 ± 18% | |
|
| |||||
| Age (years) | 34 ± 9 | 55 ± 13 | 52 ± 17 | 64 ± 11 | <0.001 |
|
| |||||
| Sex (female) | 30% | 20% | 37% | 39% | 0.06 |
| Active IE | 81% | 79% | 91% | 89% | 0.08 |
|
| |||||
| Site: Aortic | 47% | 44% | 51% | 41% | 0.03 |
| Mitral | 27% | 27% | 16% | 22% | |
| Tricuspid | 6% | 11% | 9% | 9% | |
| Mitroaortic | 11% | 16% | 21% | 26% | |
| Other | 9% | 2% | 3% | 2% | |
|
| |||||
| NYHA class IV | — | 1.7% | 52% | 59% | <0.001 |
|
| |||||
| Diabetes | 3% | 12% | 22% | 18% | <0.001 |
|
| |||||
| Renal failure | 4% | 8% | 27% | 39% | <0.001 |
|
| |||||
| Period: before 2000 | 39% | 40% | 14% | 7% | 0.003 |
| 2000–2010 | 26% | 42% | 16% | 16% | |
|
| |||||
| Positive latest preop. culture | 5% | 17% | 19% | 44% | <0.001 |
|
| |||||
| Perivalvular involvement | 4% | 12% | 27% | 44% | <0.001 |
|
| |||||
| Preop. ventilatory support | — | — | 6% | 30% | <0.001 |
|
| |||||
| Emergency | 0.7% | 4% | 22% | 59% | <0.001 |
|
| |||||
| Infection persistence postop. | 2% | 2% | 9% | 29% | <0.001 |
1Note that the 6-point score cannot be obtained by any sum of scores in this system.