Table 1. Characteristics of patients.
N: Number of patients; COPD: Chronic obstructive pulmonary disease; URT: Upper respiratory tract.
| Variables | N | (%) | |
| Age | 18-35 years | 21 | (9.8) |
| 36-50 years | 51 | (23.8) | |
| 51-65 years | 92 | (43.0) | |
| >65 years | 50 | (23.4) | |
| Gender | Male | 148 | (69.2) |
| Female | 66 | (30.8) | |
| Charlson Comorbidity Index | 0-1 | 89 | (41.6) |
| 2-3 | 87 | (40.7) | |
| ≥ 4 | 38 | (17.8) | |
| Comorbidities | Hypertension | 95 | (44.4) |
| Diabetes mellitus | 96 | (44.9) | |
| Ischemic heart disease | 20 | (9.3) | |
| Asthma/COPD | 22 | (10.3) | |
| Chronic kidney disease | 11 | (5.1) | |
| Malignancy | 2 | (0.9) | |
| Presenting symptoms | Fever | 117 | (54.7) |
| Dyspnea | 141 | (65.9) | |
| Cough | 110 | (51.4) | |
| Nausea/Vomiting | 24 | (11.2) | |
| Fatigue | 21 | (9.8) | |
| Diarrhea | 15 | (7.0) | |
| Abdominal pain | 18 | (8.4) | |
| Headache | 12 | (5.6) | |
| Myalgia | 5 | (2.3) | |
| URT symptoms | 11 | (5.1) | |
| Loss of taste or smell | 6 | (2.8) | |
| Duration of symptoms | 1 day | 34 | (17.1) |
| 2-3 days | 59 | (29.6) | |
| 4-7 days | 64 | (32.2) | |
| >7 days | 42 | (21.1) | |
| Vital signs | Heart rate >100 bpm | 92 | (43.0) |
| Respiratory rate >20 bpm | 147 | (68.7) | |
| Temperature ≥38° | 57 | (26.6) | |
| Oxygen saturation <95% | 104 | (48.6) | |