Table 5.

Best thresholds in each MR perfusion map by ROC curve analysis for defining the final infarct in reperfusion group

	Parameters	AUC	Thresholds	Sensitivity	Specificity	Youden index
Reperfused over 70% (n = 20)	Tmax	0.793	5.6 seconds	76.8%	70.3%	0.471
	rMTT	0.618	127%	66.1%	51.7%	0.177
	rCBF	0.604	43%	40.4%	74.6%	0.150
	rCBV	0.587	49%	48.9%	65.2%	0.141
Reperfused over 90% (n = 17)	Tmax	0.799	6.0 seconds	78.6%	79.7%	0.483
	rMTT	0.604	121%	73.5%	41.5%	0.151
	rCBF	0.589	42%	41.5%	72.4%	0.139
	rCBV	0.576	49%	52.8%	61.4%	0.132