From: Clinical classification of tissue perfusion based on the central venous oxygen saturation and the peripheral perfusion index
Variable
ROC area
95Â % CI
Cutoff value
Sensitivity
Specificity
Lactate, mmol/L
0.693*
0.625, 0.756
3.6
35.71
94.83
ScvO2, %
0.669*
0.599, 0.733
70
42.86
83.33
P(v-a) CO2
0.596*
0.525, 0.664
6
70.11
PI
0.835
0.777, 0.884
0.6
60.71
89.66