Table 3. Diagnostic ability of the different parameters to predict fluid responsiveness.

Variables	AUC (95% CI)	Optimal cutoff	Sensitivity (%)	Specificity (%)	Youden index	Positive predictive value	Negative predictive value	Positive likelihood ratio	Negative likelihood ratio
SVV	0.75 (0.64–0.86)	12%	72.22	64.10	0.36	0.65	0.71	2.01	0.43
CVP	0.49 (0.36–0.62)	7	56.80	45.00	0.02	0.49	0.53	1.03	0.96
△VTI-EEO	0.90 (0.83–0.97)	5%	80.56	92.50	0.73	0.91	0.84	10.74	0.21
△Vmax-EEO	0.75 (0.63–0.86)	3%	31.43	94.97	0.26	0.85	0.61	6.13	0.72
△PP-EEO	0.71 (0.59–0.83)	5%	60.61	74.36	0.35	0.67	0.69	2.36	0.53

AUC, area under the receiver operating characteristic curve; CI, confidence interval; SVV, respiratory variation of stroke volume; CVP, central venous pressure; △VTI-EEO, changes in VTI induced by end-expiratory occlusion; △Vmax-EEO, changes in peak velocity induced by end-expiratory occlusion; ÄPP-EEO, changes in artery pulse pressure induced by end-expiratory occlusion.