| Age (year) | 71.2±15.3 | 69.7±15.8 | 78.3±10.7 | 0.030 |
| Women (n [%]) | 66 (64.1) | 52 (61.2) | 14 (77.8) | 0.182 |
| Chronic medical conditions |
| Hypertension (n [%]) | 59 (57.3) | 46 (54.1) | 13 (72.2) | 0.158 |
| Chronic ischemic heart disease (n [%]) | 16 (15.5) | 12 (14.1) | 4 (22.2) | 0.389 |
| Heart failure (n [%]) | 16 (15.5) | 14 (16.5) | 2 (11.1) | 0.569 |
| Diabetes mellitus (n [%]) | 31 (30.1) | 25 (29.4) | 6 (33.3) | 0.742 |
| Chronic renal failure (n [%]) | 18 (17.5) | 12 (14.1) | 6 (33.3) | 0.051 |
| Neurological disease (n [%]) | 10 (9.7) | 7 (8.2) | 3 (16.7) | 0.273 |
| COPD (n [%]) | 16 (15.5) | 12 (14.1) | 4 (22.2) | 0.389 |
| Cancer (n [%]) | 7 (6.8) | 3 (3.5) | 4 (22.2) | 0.004 |
| Smoker (n [%]) | 9 (8.7) | 8 (9.4) | 1 (5.6) | 0.599 |
| Alcohol drinking (n [%]) | 5 (4.9) | 4 (4.7) | 1 (5.6) | 0.879 |
| General condition of patient at the time of diagnosis |
| Chest pain (n [%]) | 38 (36.9) | 31 (36.5) | 7 (38.9) | 0.870 |
| Dyspnea (n [%]) | 59 (57.3) | 43 (50.6) | 16 (88.9) | 0.003 |
| Syncope (n [%]) | 1 (1.0) | 1 (1.2) | 0 (0.0) | 0.644 |
| Heart rate (bpm) | 100.7±24.3 | 96.6±22.5 | 119.1±23.7 | <0.001 |
| Blood pressure (mmHg) | 119.6±24.6 | 122.7±20.6 | 124.7±33.5 | 0.330 |
| Respiratory rate (bpm) | 20.0 (19.0–20.0) | 20.0 (19.0–20.0) | 20.0 (19.0–23.0) | 0.127 |
| Temperature (C degrees) | 37.0 (37.0–37.0) | 37.0 (37.0–37.0) | 37.0 (37.0–37.4) | 0.179 |
| Weigh (kg) | 54.0±11.1 | 53.6±11.3 | 55.9±10.5 | 0.513 |
| Heigh (cm) | 156.5±9.5 | 156.5±9.8 | 156.7±8.2 | 0.962 |
| BMI (kg/m2) | 22.0±4.3 | 21.9±4.5 | 22.7±3.2 | 0.573 |
| Respiratory failure (n [%]) | 19 (18.4) | 11 (12.9) | 8 (44.4) | 0.020 |
| Acute heart failure | 31 (30.1) | 20 (23.5) | 11 (61.1) | 0.002 |