Fig. 3

Respiratory rate, PaO2/FiO2 and FiO2 at baseline, 1–2 h and termination of HFNC. *p < 0.05 for comparisons between two groups
Respiratory rate, PaO2/FiO2 and FiO2 at baseline, 1–2 h and termination of HFNC. *p < 0.05 for comparisons between two groups