Distribution of patients and 30-day mortality in each risk class assessed using the PSI and CURB-65 scores and by site of care
| Outpatients | Ward | ICU | Total | |||||
| Risk group | n (%) | 30-day mortality, n (%) | n (%) | 30-day mortality, n (%) | n (%) | 30-day mortality, n (%) | n (%) | 30-day mortality, n (%) |
| PSI | ||||||||
| Low risk classes I–III | 457 (90) | 1 (0.2) | 1035 (41) | 10 (1) | 116 (24) | 11 (9) | 1608 (46) | 22 (1) |
| Intermediate risk class IV | 44 (9) | 0 (0) | 970 (39) | 54 (6) | 179 (37) | 28 (16) | 1193 (34) | 82 (7) |
| High risk class V | 8 (2) | 1 (12) | 508 (20) | 97 (19) | 192 (39) | 55 (29) | 708 (20) | 153 (22) |
| CURB-65 | ||||||||
| Low risk classes 0–1 | 458 (89) | 1 (0.2) | 1197 (47) | 19 (2) | 151 (31) | 16 (11) | 1806 (51) | 36 (2) |
| Intermediate risk class 2 | 48 (9) | 1 (2) | 785 (31) | 52 (7) | 144 (30) | 26 (18) | 977 (28) | 79 (8) |
| High risk classes 3–5 | 8 (2) | 0 (0) | 539 (21) | 90 (17) | 193 (40) | 52 (27) | 740 (21) | 142 (19) |
| Kappa index | ||||||||
| Value | 0.54 | ND | 0.52 | 0.40 | 0.39 | 0.37 | 0.54 | 0.39 |
| p Value | <0.001 | ND | <0.001 | <0.001 | <0.001 | <0.001 | <0.001 | <0.001 |
30-day mortality calculated as the ratio between the total number of patient deaths in each risk class and the total number of patients in each risk class multiplied by 100. PSI was not available in 14 patients.
CURB-65, confusion, blood urea nitrogen, respiratory rate, blood pressure, age; ND, not done; PSI, pneumonia severity index.