TABLE 1

Baseline patient characteristics

CharacteristicsEligible patientsRegistry populationp-value
Subjects n265791
Age years79.0 (69.0–85.0)75.0 (62.3–83.0)<0.001
Male171 (64.5)446 (56.4)0.024
Treated in outpatient clinic0 (0.0)338 (42.7)
BMI kg/m219.9 (17.3–22.9)20.9 (18.1–23.7)0.017
Performance status<0.001
 084 (31.7)383 (49.1)
 153 (20.0)165 (21.2)
 237 (14.0)82 (10.5)
 343 (16.2)75 (9.6)
 448 (18.1)75 (9.6)
Comorbidity
 Diabetes54 (20.3)150 (19.2)0.731
 Chronic heart failure42 (15.8)73 (9.3)0.005
 Cerebrovascular disease66 (25.0)124 (15.8)0.001
 Chronic kidney disease28 (10.6)49 (6.3)0.01
 Dementia37 (14.0)68 (8.7)0.019
 Malignancy59 (22.3)136 (17.4)0.122
 Chronic respiratory disease75 (28.3)243 (30.7)0.248
 Autoimmune disease20 (7.5)48 (6.1)0.506
CURB-65<0.001
 06 (2.3)23 (2.9)
 131 (11.7)169 (21.4)
 279 (29.8)274 (34.6)
 395 (35.8)227 (28.7)
 446 (17.4)83 (10.5)
 58 (3.0)15 (1.9)
Chest radiograph265 (100.0)791 (100.0)
Chest CT scan265 (100.0)527 (67.7)
Sputum culture
 Culture positive252 (95.0)737 (93.1)0.268
 CAP drug-susceptible pathogens220 (87.3)663 (90.0)0.093
 CAP drug-resistant pathogens32 (12.7)74 (10.0)
Virus PCR197 (74.3)552 (70.0)0.987
 Influenza virus8 (4.1)23 (4.1)
 Parainfluenza virus10 (3.8)22 (2.8)
 Human metapneumovirus6 (3.0)18 (3.3)
 Respiratory syncytial virus9 (4.6)20 (3.6)
 Rhinovirus15 (7.6)59 (10.7)
Died within 30 days after admission33 (12.5)46 (5.8)0.058

Data are presented as median (interquartile range) or n (%), unless otherwise stated. BMI: body mass index; CURB-65: confusion, urea >7 mmol·L−1, respiratory rate ≥30 breaths·min−1, blood pressure <90 mmHg (systolic) ≤60 mmHg (diastolic), age ≥65 years; CT: computed tomography; CAP: community-acquired pneumonia.