Fig. 1From: The evolution of the ventilatory ratio is a prognostic factor in mechanically ventilated COVID-19 ARDS patientsFlowchart of patient screening and enrollment. A total of 1118 patients were followed-up until hospital discharge or death. ECMO extracorporeal membrane oxygenation; ICU intensive care unit; SARS-CoV-2 severe acute respiratory syndrome coronavirus 2Back to article page