Table 4.

Classification performance of threshold-based and MST-based methods.

Method	Task	ACC (%)	SEN (%)	SPE (%)	AUC
Threshold-based	MCI/NC	63.3	73.3	65	0.65
	AD/NC	87.5	85	76.7	0.92
	AD/MCI	65.8	66.7	81.7	0.76
Proposed method	MCI/NC	98.3	96.6	100	0.99
	AD/NC	91.3	82.5	100	1
	AD/MCI	77.3	54.1	100	0.97

Threshold-based denotes a brain function network with the sparsity of 40%; AD, Alzheimer's disease; NC, Normal control; MCI, Mild cognitive impairment; ACC, Accuracy; SEN, Sensitivity; SPE, Specificity; AUC, The area under the receiver operating characteristic curve.