Fig. 2From: Prediction of high-flow nasal cannula outcomes at the early phase using the modified respiratory rate oxygenation indexScatter plots of SpO2 over PaO2 in the HFNC success and failure groups. Left: data at baseline; right: data at 2 h after HFNC initiated. Top: HFNC success group; bottom: HFNC failure groupBack to article page