Table 3 Patients’ baseline characteristics
|  | Overall n = 9886 | Primary care offices n = 6719 | EDs n = 3167 |
|---|---|---|---|
Age, mean ± SD | 47.4 ± 18 | 50.2 ± 12.3 | 47.7 ± 16.8 |
Sex-ratio (M/F) | 1.23 | 2.29 | 2.14 |
Active smoking, n (%) | 2148 (21.7) | 1559 (23.2) | 589 (18.6) |
Past medical history, n (%) | |||
 Diabetes | 1697 (17.2) | 1095 (16.3) | 602 (19) |
 Hypertension | 2048 (20.7) | 1424 (21.2) | 624 (19.7) |
 COPD | 1805 (18.2) | 1165 (17.3) | 640 (20.2) |
Symptoms, n (%) | |||
 Cough | 5959 (60.3) | 3783 (56.3) | 2176 (68.7) |
 Sputum | 3626 (36.6) | 2258 (33.6) | 1368 (43.2) |
 Runny nose | 2624 (26.5) | 1807 (26.9) | 817 (25.8) |
 Sore throat | 2186 (22.1) | 1176 (17.5) | 1010 (31.9) |
 Headache | 2011 (20.3) | 1283 (19.1) | 728 (23) |
 Dysphagia | 1929 (19.5) | 1337 (19.9) | 592 (18.7) |
 Fever | 1925 (19.5) | 1384 (20.6) | 541 (17.1) |