Table 4. Predictive accuracy and goodness of fit for one-year mortality of continuous risk scores.
| Derivation | Validation | |||||
|---|---|---|---|---|---|---|
| C-index (s.e) | AIC | R2 | C-index (s.e) | AIC | R2 | |
| PSI | 0.73 (0.024) | 1750.74 | 7.6% | 0.75 (0.025) | 1556.01 | 9.1% |
| CURB65 | 0.69 (0.024) | 1782.87 | 5.2% | 0.71 (0.025) | 1598.38 | 5.7% |
| SCAP | 0.70 (0.024) | 1784.05 | 5.1% | 0.70 (0.025) | 1608.79 | 4.8% |
| One-year CAPSI | 0.76 (0.024) | 1707.43 | 8.8% | 0.77 (0.025) | 1562.67 | 8.5% |
C-index: concordance index with standard error for the one-year CAPSI as continuous variable; AIC: Akaike information criterion; R2: R-square; PSI: pneumonia severity index; CURB65: confusion, urea, respiratory rate, blood pressure, age>65. SCAP: severe community-acquired pneumonia; one-year CAPSI: one-year community-acquired severity index.