Subjects n | 265 | 791 | |
Age years | 79.0 (69.0–85.0) | 75.0 (62.3–83.0) | <0.001 |
Male | 171 (64.5) | 446 (56.4) | 0.024 |
Treated in outpatient clinic | 0 (0.0) | 338 (42.7) | |
BMI kg/m2 | 19.9 (17.3–22.9) | 20.9 (18.1–23.7) | 0.017 |
Performance status | | | <0.001 |
0 | 84 (31.7) | 383 (49.1) | |
1 | 53 (20.0) | 165 (21.2) | |
2 | 37 (14.0) | 82 (10.5) | |
3 | 43 (16.2) | 75 (9.6) | |
4 | 48 (18.1) | 75 (9.6) | |
Comorbidity |
Diabetes | 54 (20.3) | 150 (19.2) | 0.731 |
Chronic heart failure | 42 (15.8) | 73 (9.3) | 0.005 |
Cerebrovascular disease | 66 (25.0) | 124 (15.8) | 0.001 |
Chronic kidney disease | 28 (10.6) | 49 (6.3) | 0.01 |
Dementia | 37 (14.0) | 68 (8.7) | 0.019 |
Malignancy | 59 (22.3) | 136 (17.4) | 0.122 |
Chronic respiratory disease | 75 (28.3) | 243 (30.7) | 0.248 |
Autoimmune disease | 20 (7.5) | 48 (6.1) | 0.506 |
CURB-65 | | | <0.001 |
0 | 6 (2.3) | 23 (2.9) | |
1 | 31 (11.7) | 169 (21.4) | |
2 | 79 (29.8) | 274 (34.6) | |
3 | 95 (35.8) | 227 (28.7) | |
4 | 46 (17.4) | 83 (10.5) | |
5 | 8 (3.0) | 15 (1.9) | |
Chest radiograph | 265 (100.0) | 791 (100.0) | |
Chest CT scan | 265 (100.0) | 527 (67.7) | |
Sputum culture | | | |
Culture positive | 252 (95.0) | 737 (93.1) | 0.268 |
CAP drug-susceptible pathogens | 220 (87.3) | 663 (90.0) | 0.093 |
CAP drug-resistant pathogens | 32 (12.7) | 74 (10.0) | |
Virus PCR | 197 (74.3) | 552 (70.0) | 0.987 |
Influenza virus | 8 (4.1) | 23 (4.1) | |
Parainfluenza virus | 10 (3.8) | 22 (2.8) | |
Human metapneumovirus | 6 (3.0) | 18 (3.3) | |
Respiratory syncytial virus | 9 (4.6) | 20 (3.6) | |
Rhinovirus | 15 (7.6) | 59 (10.7) | |
Died within 30 days after admission | 33 (12.5) | 46 (5.8) | 0.058 |