Table 6. Risk of hospital mortality according to the total score of each PIRO component.
| Predisposition | Insult | Response | Organ | ||||||
| Risk of mortality classification | P1 Low | P2 Medium | P3 High | I1 Low | I2 High | R1 Low | R2 High | O1 Low | O2 High |
| Score (total sum of points) | 0–2 | 3–4 | ≥5 | 0–1 | 2 | 0–3 | ≥4 | 0 | ≥1 |
| Derivation Cohort | |||||||||
| Hospital mortality (n = 138) | 3% | 11% | 30% | 11% | 19% | 11% | 47% | 5% | 17% |
| Percentage of total patients (n = 1035) | 45% | 25% | 30% | 69% | 31% | 93% | 7% | 33% | 67% |
| Validation Cohort | |||||||||
| Hospital mortality (n = 34) | 3% | 16% | 33% | 16% | 26% | 12% | 52% | 0% | 24% |
| Percentage of total patients (n = 186) | 36% | 24% | 40% | 73% | 27% | 84% | 16% | 24% | 76% |