Distribution of patients, and rates of mortality, according to CURB-65 score
| CURB-65 score | Total population | npAECOPD | pAECOPD | |||
| n (%) | Mortality % | n | Mortality % | n | Mortality % | |
| 0 | 135 (14.7) | 4.4 | 115 | 2.6 | 20 | 15 |
| 1 | 278 (30.2) | 4.0 | 208 | 1.9 | 70 | 10.0 |
| 2 | 295 (32.1) | 9.5 | 195 | 6.2 | 100 | 16 |
| 3 | 169 (18.4) | 20.1 | 87 | 16.1 | 82 | 24.4 |
| 4 | 36 (3.9) | 36.1 | 15 | 20 | 21 | 47.6 |
| 5 | 7 (0.8) | 57.1 | 1 | 0 | 6 | 66.7 |
npAECOPD, non-pneumonic acute exacerbations of chronic obstructive pulmonary disease; pAECOPD, pneumonic acute exacerbations of chronic obstructive pulmonary disease.