Fig. 1From: Effects of early versus delayed application of prone position on ventilation–perfusion mismatch in patients with acute respiratory distress syndrome: a prospective observational studyA PaO2/FIO2 changes from supine to prone position for the whole population, patients with early ARDS, and patients with persistent ARDS. B The correlation between delta PaO2/FIO2 and timing of ARDS onset when transitioning to prone position in the patients with early ARDS and persistent ARDS. Transverse line: median. ARDS acute respiratory distress syndromeBack to article page