Figure 3.

ROC curves for baseline values of SvO₂ (green line), CVP (blue line) and PAOP (red line). Diagonal segments are produced by ties. AUC were 0.51, 0.68 and 0.71 for SvO₂, CVP and PAOP, respectively. CVP at a cutoff of 11 mmHg had a sensitivity of 67% and a specificity of 54% for predicting fluid responsiveness. PAOP at a cutoff of 13 mmHg had a sensitivity of 59% and a specificity of 65%. AUC: area under the curve; CVP: central venous pressure; PAOP: pulmonary artery occlusion pressure; ROC: receiver operating characteristic; SvO₂: mixed venous oxygen saturation.