Initial physical examination and laboratory findings
| Variable | Patients with CAP≥65 years (n=2569) | Patients with NHAP≥65 years (n=518) | p Value |
| Cough, n (%) | 2266 (88.5) | 425 (83.3) | 0.001 |
| Purulent sputum, n (%) | 1394 (54.5) | 210 (41.3) | <0.001 |
| Fever, n (%) | 1461 (56.9) | 294 (56.8) | 0.955 |
| Dyspnoea, n (%) | 2072 (81.2) | 424 (84.1) | 0.123 |
| Confusion, n (%) | 374 (14.7) | 243 (49.2) | <0.001 |
| Chest pain, n (%) | 820 (33.2) | 65 (16.4) | <0.001 |
| Severe hypotension*, n (%) | 542 (21.2) | 154 (30.3) | <0.001 |
| Tachycardia†, n (%) | 885 (34.7) | 197 (38.6) | 0.091 |
| Tachypnea‡, n (%) | 310 (13.0) | 83 (17.8) | 0.007 |
| Haemoglobin, g/dl (median (IQR) (n)) | 13.2 (2.4) (2508) | 12.6 (2.7) (507) | <0.001 |
| Anaemia§, n (%) | 892 (35.6) | 225 (44.4) | <0.001 |
| Complete blood count, n (%) | 2535 (99.7) | 508 (99.8) | 0.751 |
| With differential, n (%) | 716 (29.1) | 110 (22.6) | 0.004 |
| Haematocrit, % (median (IQR) (n)) | 39.0 (6.0) (2327) | 38.0 (7.0) (474) | <0.001 |
| Platelets, /10−9 litre (median (IQR) (n)) | 230 (123) (2491) | 259 (143) (502) | <0.001 |
| Thrombopenia¶, n (%) | 243 (9.8) | 33 (6.6) | 0.025 |
| Leucocytes, /10−9 litre (median (IQR) (n)) | 12.4 (7.1) (2532) | 13.5 (8.5) (507) | 0.001 |
| Leuocytosis**, n (%) | 46 (1.8) | 13 (2.6) | 0.266 |
| Leucopenia††, n (%) | 33 (1.3) | 6 (1.2) | 0.827 |
| Lymphocytes, % (median (IQR) (n)) | 10 (9) (710) | 8.5 (8.4) (109) | 0.392 |
| CRP, mg/litre (median (IQR) (n)) | 112 (180) (2478) | 97 (149) (492) | 0.023 |
| BUN, mg/dl (median (IQR) (n)) | 20.2 (15.5) (2163) | 24.9 (23.9) (454) | <0.001 |
↵* Systolic <90 mm Hg or diastolic ≤60 mm Hg.
↵† Heart rate >100/min.
↵‡ Respiratory rate ≥30/min.
↵§ 12 g/dl for women, 13 g/dl for men.
↵¶ Platelet count <140/10−9 litre.
↵** Leucocytes >30/10−9 litre.
↵†† Leucocytes <4/10−9 litre.
BUN, blood urea nitrogen; CAP, community-acquired pneumonia; CRP, C-reactive protein; NHAP, nursing-home-acquired pneumonia.