Table 4.

ROC analysis for differentiating stroke patients from healthy person.

	MNI coordinates
Brain regions	X	Y	Z	AUC	Maximal Youden’s index J	Sensitivity	Specificity
dALFF at SMA	12	-12	57	0.965	0.861*	95.2% (40/42)	90.9% (50/55)
dReHo at MFG.IL	45	54	18	0.911	0.832	92.9% (39/42)	90.3% (49/55)

^∗By this optimal cut-off point, the dynamic ALFF value of SMA could correctly classify 40 of 42 patients and 50 of 55 healthy subjects, resulted in a sensitivity of 95.2% and a specificity of 90.9.2%. The means of other optimal cut-off point was similar. MNI, Montreal Neurological Institute; AUC, areas under the curves; dALFF, dynamic amplitude of low-frequency fluctuation; dReHo, dynamic regional homogeneity; SMA, supplementary motor area; MFG, middle frontal gyrus; IL, ipsilesional.