Table 1.
Baseline characteristics
| HFNC (n = 55) | Standard oxygen mask (n = 57) | P value | |
|---|---|---|---|
| Age (years) | 65.66 ± 7.29 | 66.74 ± 8.41 | 0.646 |
| Male sex | 27 (54) | 26 (52) | 0.923 |
| PaO2/FiO2 ratio | 147.28 ± 27.17 | 151.56 ± 29.72 | 0.875 |
| PaCO2 (mmHg) | 54.31 ± 6.76 | 51.91 ± 5.32 | 0.725 |
| mMRC dyspnea score | 3.62 ± 0.23 | 3.52 ± 0.17 | 0.912 |
| WBC count (×109/L) | 15.34 ± 2.36 | 14.55 ± 3.02 | 0.723 |
| PCT (µg/L) | 2.35 ± 1.45 | 1.91 ± 1.62 | 0.126 |
| CRP (mg/L) | 104.68 ± 30.75 | 110.22 ± 24.64 | 0.143 |
Data are mean ± standard deviation or n (%).
HFNC, high-flow nasal cannula; PaO2, partial pressure of arterial blood oxygen; PaCO2, partial pressure of arterial blood carbon dioxide; FiO2, fraction of inspired oxygen; mMRC, Modified Medical Research Council; WBC, white blood cell; PCT, procalcitonin; CRP, C-reactive protein.