Table 4.

Pearson correlation coefficient and area under the ROC curve for the various parameters

	Correlation coefficient (p value)	AUC ± SE
IVCmax at baseline	0.17 (0.21)	0.62 ± 0.07
cIVC at baseline	0.20 (0.12)	0.62 ± 0.07
ΔCO	0.69 (0.0001)	0.78 ± 0.06

ROC receiver operating characteristic, AUC area under the ROC curve ± standard error, ∆CO change in cardiac output between baseline and after PLR, IVCmax maximum inferior vena cava diameter, cIVC inferior vena cava collapsibility index