Table 2.

Comparison of regression performances of the competing methods.

Modality	Method	AD vs. NC				MCI vs. NC
		ADAS-Cog		MMSE		ADAS-Cog		MMSE
		CC	RMSE	CC	RMSE	CC	RMSE	CC	RMSE
MRI	MRI-N	0.587	4.96	0.520	2.02	0.329	4.48	0.309	1.90
	MRI-S	0.591	4.85	0.566	1.95	0.347	4.27	0.367	1.64
	HOGM	0.625	4.53	0.598	1.91	0.352	4.26	0.371	1.63
	M3T	0.649	4.60	0.638	1.91	0.445	4.27	0.420	1.66
	SJCR	0.652	4.69	0.636	1.90	0.448	4.27	0.425	1.67
	Proposed	0.661	4.58	0.650	1.89	0.461	4.21	0.441	1.62
PET	PET-N	0.597	4.86	0.514	2.04	0.333	4.34	0.331	1.70
	PET-S	0.620	4.83	0.593	2.00	0.356	4.26	0.359	1.69
	HOGM	0.600	4.69	0.515	1.99	0.360	4.21	0.368	1.67
	M3T	0.647	4.67	0.593	1.92	0.447	4.24	0.432	1.68
	SJCR	0.644	4.65	0.595	1.97	0.446	4.23	0.426	1.68
	Proposed	0.663	4.64	0.610	1.89	0.452	4.21	0.444	1.66
MP	MP-N	0.626	4.80	0.587	1.99	0.365	4.29	0.335	1.69
	MP-S	0.634	4.83	0.585	1.92	0.359	4.25	0.371	1.67
	M2TFS-C	0.641	4.89	0.636	1.87	0.446	4.25	0.408	1.64
	M2TFS-K	0.645	4.59	0.648	1.82	0.458	4.21	0.415	1.63
	HOGM	0.633	4.64	0.602	1.83	0.364	4.20	0.365	1.65
	M3T	0.653	4.61	0.639	1.91	0.450	4.23	0.433	1.64
	SJCR	0.656	4.64	0.643	1.81	0.451	4.19	0.431	1.64
	Proposed	0.666	4.53	0.651	1.80	0.463	4.20	0.448	1.62
MPC	MPC-N	0.629	4.79	0.588	1.97	0.368	4.29	0.337	1.70
	MPC-S	0.638	4.81	0.599	1.92	0.366	4.25	0.394	1.66
	HOGM	0.639	4.63	0.611	1.81	0.365	4.20	0.368	1.65
	M3T	0.665	4.59	0.663	1.81	0.451	4.22	0.441	1.62
	SJCR	0.658	4.64	0.645	1.81	0.451	4.19	0.433	1.63
	Proposed	0.668	4.47	0.685	1.78	0.470	4.16	0.456	1.59

(CC: Correlation Coefficient, RMSE: Root Mean Square Error)