Table 2.

Classification performances (%).

Task	Method	#params	ACC (%)	SEN (%)	SPE (%)
AD vs. NC	Hosseini-Asl et al. 2018	~9,100 K	80.23 ± 4.57	82.97	77.60
	Korolev et al. 2017	~5,610 K	76.53 ± 7.47	79.38	73.93
	Rieke et al. 2018	~5,324 K	74.30 ± 6.34	76.21	72.50
	CNNs (Scratch)	~1,446 K	75.75 ± 6.08	81.45	73.16
	CAE	~1,446 K	85.24 ± 3.97	88.28	82.39
	ICAE	~371 K	86.60 ± 3.66	88.55	84.54
pMCI vs. NC	Hosseini-Asl et al. 2018	~9,100 K	71.01 ± 5.47	74.11	67.91
	Korolev et al. 2017	~5,610 K	68.85 ± 6.73	72.59	65.51
	Rieke et al. 2018	~5,324 K	69.95 ± 4.94	71.97	77.45
	CNNs (Scratch)	~1,446 K	68.12 ± 5.88	75.42	60.91
	CAE	~1,446 K	76.57 ± 3.96	82.66	70.03
	ICAE	~371 K	77.37 ± 3.55	81.03	74.07
sMCI vs. NC	Hosseini-Asl et al. 2018	~9,100 K	61.79 ± 4.44	61.98	61.61
	Korolev et al. 2017	~5,610 K	60.84 ± 5.23	62.23	59.56
	Rieke et al. 2018	~5,324 K	61.19 ± 4.89	63.04	69.37
	CNNs (Scratch)	~1,446 K	59.50 ± 5.84	61.47	57.74
	CAE	~1,446 K	62.83 ± 5.17	66.07	60.02
	ICAE	~371 K	63.04 ± 4.16	59.02	67.11
pMCI vs. AD	Hosseini-Asl et al. 2018	~9,100 K	60.83 ± 5.41	60.99	60.65
	Korolev et al. 2017	~5,610 K	59.24 ± 4.89	62.88	56.18
	Rieke et al. 2018	~5,324 K	60.53 ± 5.11	64.31	56.97
	CNNs (Scratch)	~1,446 K	55.62 ± 5.84	55.15	56.13
	CAE	~1,446 K	59.47 ± 6.32	60.00	58.92
	ICAE	~371 K	60.97 ± 5.33	64.53	56.13
sMCI vs. AD	Hosseini-Asl et al. 2018	~9,100 K	67.69 ± 6.41	69.58	65.63
	Korolev et al. 2017	~5,610 K	70.64 ± 5.83	70.08	71.28
	Rieke et al. 2018	~5,324 K	65.68 ± 4.19	61.33	69.44
	CNNs (Scratch)	~1,446 K	63.39 ± 7.14	66.31	60.12
	CAE	~1,446 K	74.68 ± 6.04	75.20	74.07
	ICAE	~371 K	75.06 ± 3.86	76.55	73.39