Table 1.
Demographic and clinical characteristics of COVID-19 patients.
| Variables | NIMV (n = 29) |
IMV (n = 76) |
p-Value |
|---|---|---|---|
| Age, years (±SD) | 46 (12) | 50 (11) | 0.14 |
| Male gender (%) | 20 (69) | 49 (64) | 0.81 |
| Body mass index (±SD) | 29 (5) | 29 (5) | 0.72 |
| Current smoking (%) | 28 (97) | 23 (30) | <0.0001 |
| Diabetes mellitus (%) | 11 (38) | 21 (27) | 0.36 |
| Hypertension (%) | 1 (3) | 17 (22) | 0.02 |
| PaO2/FiO2 (±SD) | 244 (47) | 133 (64) | <0.0001 |
| Hospital stay (±SD) | 13 (11) | 38 (14) | <0.0001 |
| C-reactive protein (±SD) | 8.9 (10) | 24 (46) | 0.0002 |
| D-dimer (±SD) | 0.87 (1) | 2.39 (5) | 0.0009 |
| Procalcitonin (±SD) | 0.13 (0.27) | 0.62 (1) | <0.0001 |
| Lactate dehydrogenase (±SD) | 346 (131) | 556 (261) | <0.0001 |
| Troponin (±SD) | 86 (163) | 126 (550) | 0.002 |
| Fibrinogen (±SD) | 644 (152) | 732 (228) | 0.07 |
| Leukocytes (±SD) | 7.6 (3) | 11 (5) | 0.001 |
| Lymphocytes (±SD) | 0.98 (4) | 1.01 (0.75) | 0.49 |
| Platelets (±SD) | 255 (154) | 247 (100) | 0.65 |
NIMV, non-invasive mechanical ventilation; IMV, invasive mechanical ventilation; PaO2/FiO2, arterial pressure of oxygen/inspired fraction of oxygen.