Table 3.

Comparison between the performance of the FA proposed in this work and the PCA-based method (PCA) in Ref. 35. m is the number of factors or components.

		FA	PCA
NC versus AD	Acc	95.2	89.5
	Sen	98.1	84.5
	Spe	92.5	84.7
	m	17	8
NC versus MCI	Acc	88.0	81.3
	Sen	91.2	97.4
	Spe	80.8	46.1
	m	19	30
NC versus MCI,AD	Acc	86.3	82.2
	Sen	92.8	92.21
	Spe	65.4	50
	m	11	30