Fig. 3From: A new non-invasive index for the prediction of endotracheal intubation in patients with SARS COVID-19 infection, in the emergency department, pilot studyReceiver operating characteristic curves comparing prediction tools. REXI_SAF (ultrasound diaphragmatic excursion So2/FiO2 index right), LEXI_SAFI (ultrasound diaphragmatic excursion So2/FiO2 index left), SAFI: SaO2/FiO2, PAFI: Pao2/Fio2 mm Hg, ROX: respiratory rate-oxygenationBack to article page