Patient characteristics of cases and controls
| Characteristics | Cases | Controls |
| Subjects n | 1108 | 3817 |
| Age yrs | ||
| <40 | 99 (8.9) | 396 (10.3 |
| 40–49 | 91 (8.2) | 352 (9.2) |
| 50–59 | 116 (10.5) | 461 (12.1) |
| 60–69 | 190 (17.1) | 637 (16.7) |
| 70–79 | 353 (31.9) | 1048 (27.5) |
| 80–89 | 218 (19.7) | 798 (20.9) |
| ≥90 | 41 (3.7) | 125 (3.3) |
| Sex | ||
| Male | 650 (58.7) | 1998 (52.3) |
| Female | 458 (41.3) | 1819 (47.7) |
| CAP discharge diagnosis | ||
| Primary diagnosis of CAP | 1100 (99.3) | |
| Pneumococcal pneumonia | 84 (7.6) | |
| Other bacterial pneumonia | 90 (8.1) | |
| Bronchopneumonia, organism unspecified | 140 (12.6) | |
| Pneumonia, organism unspecified | 794 (71.7) | |
| Comorbidities | ||
| Heart failure | 126 (11.4) | 108 (2.8) |
| Respiratory diseases | 454 (41.0) | 333 (8.7) |
| Diabetes | 134 (12.1) | 259 (6.8) |
Data are presented as n and n (%). CAP: community-acquired pneumonia.