Table 3.

Receiver operating characteristic (ROC) curve analysis (n = 86)

Perfusion factor	Cut-off value	AUC	P value	95% CI
Slope (AU/sec)	0.7	0.123	0.002	0.001–0.245
T1/2MAX (sec)	18	0.963	< 0.001	0.910–1.0
TR	0.6	0.929	< 0.001	0.845–1.000

Slope (fast > 1.0 AU/sec, slow < 0.7 AU/sec), T_1/2MAX (fast < 10 s, slow > 18 s), TR time ratio (fast < 0.4, slow > 0.6), AUC area under curve, AU arbitrary unit, CI confidence interval