Table 2. Physiologic and laboratory data of patients at hospital admission.
| Parameters | HFNC only group (n=45) | MV with prior HFNC (n=7) | MV only group (n=9) | P value† |
|---|---|---|---|---|
| Systolic blood pressure (mmHg) | 122.7±20.2 | 121.7±16.0 | 120.1±27.8 | 0.975 |
| Diastolic blood pressure (mmHg) | 76.7±15.2 | 75.9±15.4 | 68.9±20.1 | 0.512 |
| Pulse rate (beats/min) | 109.7±21.1 | 113.1±20.3 | 120.0±28.7 | 0.819 |
| Respiratory rate (breaths/min) | 30.1±8.2 | 22.6±3.2 | 28.9±4.8 | 0.010 |
| Body temperature (°C) | 36.9±0.7 | 37.1±0.9 | 37.1±0.6 | 0.562 |
| Arterial pH | 7.45±0.06 | 7.45±0.06 | 7.39±0.06 | 0.056 |
| PaCO2 (mmHg) | 37.1±6.6 | 39.3±12.0 | 42.4±7.1 | 0.130 |
| PaO2 (mmHg) | 82.9±47.7 | 87.9±44.0 | 97.6±42.0 | 0.366 |
| Bicarbonate (mmHg) | 25.8±4.1 | 26.9±6.2 | 25.8±3.3 | 0.910 |
| PaO2/FiO2 (mmHg) | 202.9±124.8 | 197.7±82.0 | 196.8±97.3 | 0.927 |
†P value <0.05 among HFNC group, MV with prior HFNC, and MV only group. HFNC, high flow nasal cannula; MV, mechanical ventilation.