Fig. 2From: Early versus late awake prone positioning in non-intubated patients with COVID-19Oxygenation response assessment using SpO2/FiO2 during first prone session. SpO2/FiO2 values were recorded 5Â min before and 30Â min after APP. SpO2/FiO2 values are presented as median with 95% confidence interval. (APP, awake prone positioning; SpO2, saturation of pulse oximetry; FiO2, fraction of inspired oxygen)Back to article page