Table 4.

Predictive values of collapsibility index of superior vena cava for responders and nonresponders

	Responders, n (%)	Nonresponders, n (%)	Total, n (%)
cSVC cutoff
>35%	24 (80.0)	0 (0.0)	24 (80.0)
≤35%	0 (0.0)	6 (20.0)	6 (20.0)
Total	24 (80.0)	6 (20.0)	30 (100.0)
Predictive values, % (95% CI)
Sensitivity (%)	100.0 (100.0-100.0)
Specificity	100.0 (100.0-100.0)
PPV	100.0 (100.0-100.0)
NPV	100.0 (100.0-100.0)
AUC (95% CI)	1.00 (1.00-1.00)

Percentage from total number of cases. cSVC=Collapsibility index of superior vena cava, CI=Confidence interval, NPV=Negative predictive value, PPV=Positive predictive value, AUC=Area under the curve