Table 2
High Flow Nasal Prong O2 (n=113)Venturi Mask O2 (n=108)Significance
Primary composite endpoint7 (6.2%)7 (6.5%)P=1.0
Mortality1 (0.5%)0P=1.0
LOS6 (4,10)6 (3.5,9)P=0.71
HDU LOS2 (2,4)2 (1,3)P=0.084
Borg Scale HD 14 (2,6)4 (2,7)p=0.78
Borg Scale HD 23 (2,5)4.5 (2,6)P=0.13
Likert Scale HD 13 (3,4)3.5 (3,4)P=0.63
Likert Scale HD 24 (3,5)4 (3,4)P=0.47
Respiratory Rate (breaths per minute)16.5 (SD 3.3)17 (SD 3.0)P=0.21
SaO298 (97, 100)98 (96, 99.5)P=0.12
pH7.38 (SD 0.04)7.38 (SD 0.36)P=0.39
paO2 (mmHg)106.3 (SD 30.9)102.9 (SD 25)P=0.42
paCO2 (mmHg)43.6 (SD 5.6)45.5 (SD 6.5)P=0.032
Peak-flow (metres per second)245.3 (SD 124)247.2 (SD 124.5)P=0.91
  • COPD, chronic obstructive pulmonary disease.