Figure 4From: Association between administered oxygen, arterial partial oxygen pressure and mortality in mechanically ventilated intensive care unit patientsStandardised mortality ratio (SMR) by lowest partial oxygen pressure (PaO 2 )/fraction of oxygen in inspired air (FiO 2 ) ratio (kPa) in the first 24 h after intensive care unit (ICU) admission. PaO2/FiO2 ratio values are categorised as quintiles. Error bars represent 95% confidence intervals.Back to article page