| Characteristics | All patients (N = 55) |
| Mean age (SD) (year) | 59 (16.5) |
| Sex (%) |
|
| Male | 74.5 |
| Female | 25.5 |
| Comorbidities (%) | 84 |
| Hypertension | 42 |
| Diabetes | 34 |
| Coronary heart disease | 11 |
| Chronic kidney disease | 9 |
| Chronic obstructive pulmonary disease | 4 |
| Cerebrovascular disease | 4 |
| Cancer | 4 |
| Asthma | 2 |
| Cirrhosis | 2 |
| Connective tissue disease | 2 |
| Smoking | 16 |
| Alcoholism | 4 |
| Others | 11 |
| Charlson Comorbidity Index score, median (IQR) | 3 (2 - 5) |
| Length from the onset of symptoms to ICU admission, median (IQR) (day) | 7 (6 - 8) |
| Symptoms (%) |
|
| Dyspnea | 85 |
| Cough | 80 |
| Respiratory struggle | 54 |
| Fever | 26 |
| Digestive signs | 26 |
| Agitation | 22 |
| SOFA score |
|
| On admission, median (IQR) | 5 (4 - 17) |
| Highest score during the first three days, median (IQR) | 10 (5 - 16.5) |
| On day 7, median (IQR) | 11 (4 - 16.75) |