Table 2. Patient characteristics.
| Characteristics | All patients (n = 2015) | Site 1 (n = 694) | Site 2 (n = 532) | Site 3 (n = 242) | Site 4 (n = 547) | |
|---|---|---|---|---|---|---|
| Demographics | ||||||
| Age in years, median (IQR) | 75 (65, 84) | 75 (64, 84) | 79 (69, 88) | 75 (68, 83) | 72 (59, 82) | |
| Male sex, n (%) | 981 (49) | 340 (49) | 257 (48) | 113 (47) | 271 (51) | |
| Respiratory comorbidities, n (%) | ||||||
| COPD | 602 (30) | 193 (28) | 120 (23) | 94 (39) | 195 (36) | |
| Asthma | 186 (9) | 68 (10) | 49 (9) | 13 (5) | 56 (10) | |
| Bronchiectasis | 47 (2) | 11 (2) | 11 (2) | 15 (6) | 10 (2) | |
| Lung cancer | 51 (2) | 5 (1) | 13 (2) | 13 (5) | 20 (4) | |
| Interstitial lung disease | 64 (3) | 19 (3) | 14 (3) | 19 (8) | 12 (2) | |
| Other | 42 (2) | 12 (2) | 8 (2) | 13 (5) | 9 (2) | |
| Smoking history, n (%) | ||||||
| Active smoker | 355 (18) | 76 (11) | 86 (16) | 41 (17) | 152 (27) | |
| Former smoker | 814 (40) | 273 (39) | 213 (40) | 116 (47) | 212 (39) | |
| Never smoker | 313 (16) | 126 (18) | 61 (12) | 33 (14) | 93 (17) | |
| Not documented | 533 (26) | 219 (32) | 172 (32) | 52 (22) | 90 (17) | |
| CURB-65, n (%) | ||||||
| 0 | 398 (20) | 146 (21) | 78 (15) | 38 (15) | 136 (25) | |
| 1 | 701 (34) | 243 (35) | 170 (32) | 87 (37) | 201 (36) | |
| 2 | 562 (29) | 193 (28) | 160 (30) | 73 (30) | 136 (25) | |
| 3 | 283 (14) | 88 (13) | 98 (18) | 39 (16) | 58 (11) | |
| 4 | 64 (3) | 22 (3) | 24 (5) | 3 (1) | 15 (3) | |
| 5 | 7 (0) | 2 (0) | 2 (0) | 2 (1) | 1 (0) | |
| In-hospital death, n (%) | ||||||
| 143 (7) | 48 (7) | 41 (8) | 11 (5) | 43 (8) | ||
Abbreviations: COPD: chronic obstructive pulmonary disease; IQR: interquartile range; CURB-65: pneumonia mortality risk score (confusion, urea, respiration frequency, blood pressure, age 65 or older) [32].