Severity of pneumonia at admission
| Variable | Patients with CAP≥65 years (n=2569) | Patients with NHAP≥65 years (n=518) | p Value |
| Mechanical ventilation, n (%) | 123 (4.8) | 26 (5.0) | 0.815 |
| CRB-65 score, n (%) | |||
| 0 | 0 | 0 | – |
| 1–2 | 2165 (92.3) | 327 (73.3) | <0.001 |
| 3–4 | 181 (7.7) | 119 (26.7) | <0.001 |
| Time from symptoms until presentation, days (median (IQR) (n)) | 4 (5) (1513) | 2 (4) (226) | <0.001 |
| Length of stay, days (median (IQR) (n)) | 11 (7) (2429) | 10 (7) (436) | <0.001 |
CAP, community-acquired pneumonia; CRB-65, confusion, respiratory rate, blood pressure, 65 years and older; NHAP, nursing-home-acquired pneumonia.