Table 4.

Best thresholds in each MR perfusion map by ROC curve analysis for defining the final infarct in no reperfusion group

	Parameters	AUC	Thresholds	Sensitivity	Specificity	Youden index
Reperfused less than 30% (n = 19)	Tmax	0.783	6.1 seconds	72.3%	74.3%	0.466
	rMTT	0.711	143%	68.2%	65.2%	0.334
	rCBF	0.667	44%	57.1%	68.7%	0.258
	rCBV	0.604	50%	54.2%	62.1%	0.163
Reperfused less than 10%(n = 5)	Tmax	0.804	6.6 seconds	74.9%	73.5%	0.490
	rMTT	0.700	144%	66.3%	66.1%	0.323
	rCBF	0.682	42%	55.3%	73.7%	0.290
	rCBV	0.623	51%	51.7%	69.4%	0.211

AUC, area under curve.