Table 3. The result of multiple linear regression analyses.

Dependent variable	R	R2	Significant	Predictor	std.β	P
MMSE	0.724	0.524	0.003	FDG_DMN	-0.299	0.085
				Volume_DMN	0.819	< 0.001
				Volume_Hip	0.213	0.105
MoCA	0.578	0.335	0.057	FDG_DMN	-0.372	0.075
				Volume_DMN	0.720	0.005
				Volume_Hip	0.083	0.337
AVLT	0.682	0.466	0.009	FDG_DMN	-0.258	0.130
				Volume_DMN	0.707	0.003
				Volume_Hip	0.311	0.045
ADL	0.673	0.454	0.011	FDG_DMN	0.240	0.149
				Volume_DMN	-0.676	0.004
				Volume_Hip	-0.332	0.037
TMT	0.662	0.439	0.018	FDG_DMN	-0.264	0.134
				Volume_DMN	0.795	0.002
				Volume_Hip	-0.082	0.330

Abbreviations: MMSE, Mini-Mental State Examination; MoCA, Montreal Cognitive Assessment; AVLT, Rey Auditory Verbal Learning Test; ADL, Activities of Daily Living; TMT, Trail Making Test; FDG_DMN, brain metabolism within the DMN; Volume_DMN, volume of the DMN; Volume_Hip, volume of hippocampus; FDG, Fluoro-2-deoxy-D-glucose; DMN, default mode network; Hip, hippocampus.