Patient-related characteristics of individual collaborating cohorts and the combined cohort (ICCC)
| Variables | Cohort 1 (n=1847) | Cohort 2 (n=2110) | Cohort 3 (n=2287) | Cohort 4 (n=3415) | Cohort 5 (n=1014) | Cohort 6 (n=3201) | ICCC (n=13 874) |
| Age (years) | 65 (47–83) | 71 (54–87) | 56 (35–77) | 69 (51–87) | 74 (62–86) | 63 (43–83) | 65 (46–85) |
| Sex | |||||||
| Men | 950 (51.4%) | 1376 (65.2%) | 1144 (50.0%) | 1803 (52.8%) | 645 (63.6%) | 1554 (48.5%) | 7472 (53.9%) |
| Women | 897 (48.6%) | 734 (34.8%) | 1143 (50.0%) | 1612 (47.2%) | 369 (36.4%) | 1647 (51.4%) | 6402 (46.1%) |
| Ethnicity | |||||||
| White | 1456 (78.8%) | – | 1949 (85.2%) | 0 (0%) | 0 (0%) | 2791 (87.9%) | 6196 (44.7%) |
| Black | 305 (16.5%) | – | 292 (12.7%) | 0 (0%) | 0 (0%) | 309 (9.1%) | 906 (6.5%) |
| Asian | 5 (0%) | – | 16 (0.7%) | 0 (0%) | 1014 (100%) | 81 (2.4%) | 1116 (8.0%) |
| Hispanic | 58 (2.7%) | – | 0 (0%) | 0 (0%) | 0 (0%) | 8 (0.2%) | 66 (0.5%) |
| Non-aboriginal | 0 (0%) | – | 0 (0%) | 3293 (96.4%) | 0 (0%) | 0 (0%) | 3293 (23.7%) |
| Aboriginal | 0 (0%) | – | 0 (0%) | 122 (3.6%) | 0 (0%) | 0 (0%) | 122 (0.9%) |
| Other | 23 (1.2%) | – | 30 (1.3%) | 0 (0%) | 0 (0%) | 11 (0.3%) | 64 (0.5%) |
| Missing/NA | 0 (0%) | 2110 (100%) | 0 (0%) | 0 (0%) | 0 (0%) | 1 (<0.1%) | 2111 (15.2%) |
| Smoking status* | |||||||
| Non-smoker | 92 (5.0%) | 246 (11.7%) | 1664 (72.8%) | 1454 (42.6%) | 885 (87.3%) | – | 4340 (31.3%) |
| Ex-smoker | – | 168 (8.0%) | – | 939 (27.5%) | – | – | 1107 (8.0%) |
| Smoker | – | 89 (4.2%) | – | 1023 (29.9%) | – | – | 1112 (8.0%) |
| Smoking history | 232 (12.6%) | – | 604 (26.4%) | – | 129 (12.7%) | – | 965 (7.0%) |
| Missing/NA | 1523 (82.5%) | 1607 (76.2%) | 19 (0.8%) | 0 (0%) | 0 (0%) | 3201 (100%) | 6350 (45.8%) |
| Alcohol use | |||||||
| Yes | 1186 (64.2%) | 107 (5.1%) | 357 (15.6%) | 245 (7.2%) | 9 (0.9%) | – | 1904 (13.7%) |
| No | 642 (34.8%) | 1983 (94.0%) | 1562 (68.3%) | 3170 (92.8%) | 999 (98.5%) | – | 8356 (60.2%) |
| Missing/NA | 19 (1.0%) | 20 (0.9%) | 368 (16.1%) | 0 (0%) | 6 (0.6%) | 3201 (100%) | 3614 (26.0%) |
| Nursing home | |||||||
| Yes | 81 (4.3%) | 173 (8.2%) | 195 (8.5%) | 637 (21.9%) | 0 (0%) | 130 (4.1%) | 1216 (8.8%) |
| No | 1628 (88.1%) | 1937 (91.8%) | 2092 (91.5%) | 2778 (78.1%) | 1014 (100%) | 3071 (95.9%) | 12 520 (90.2%) |
| Missing | 138 (7.5%) | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | 0 (%) | 138 (1.0%) |
Values presented are median (IQR) for normally distributed and non-normally distributed continuous data (other continuous variables) and number (%) for all categorical data. Percentages may not sum to 100% due to rounding.
↵* Some cohorts (cohorts 1, 3 and 5 recorded smoking history without differentiating between ex- and current smokers).
ICCC, International Community-Acquired Pneumonia (CAP) Collaboration Cohort; NA, not available.