Fig. 2From: Clinical classification of tissue perfusion based on the central venous oxygen saturation and the peripheral perfusion indexReceiver operating characteristic curves comparing the ability of peripheral perfusion index (PI), lactate (Lac), difference between central venous and arterial PCO2 (Pv-a CO2) and central venous O2 saturation (ScvO2) to discriminate mortality at day 30 in all the critically ill patients. AUC area under the curveBack to article page