Fig. 2From: Diaphragm ultrasound evaluation during weaning from mechanical ventilation in COVID-19 patients: a pragmatic, cross-section, multicenter studyDTF distribution, with respect to PaO2/FiO2, in successfully weaned patients (in blue) and unsuccessfully (in red). The trend was obtained through a mixed linear regression model, which demonstrates a U-shaped trend in DTF values, lowest PaO2/FiO2 values at both extremes, for patients who failed weaningBack to article page