Figure 4From: Acute lung injury and the acute respiratory distress syndrome in Ireland: a prospective audit of epidemiology and managementMortality associated with PaO2/FiO2 ratio quartiles on the day of diagnosis of ALI/ARDS. ALI, acute lung injury; ARDS, acute respiratory distress syndrome; FiO2, fraction of inspired oxygen; PaO2, arterial oxygen tension.Back to article page