Table 4. Results of the Statistical Comparisons of the GMV Values between the Participants with and without Dementia for Each ROI and Results of ROC Curve Analysis of GMV in Each ROI for the Group Classification.

ROI	Non-Dementia (Mean ± SD)	Dementia (Mean ± SD)	P	AUC	P
Anterior cingulate	0.342 ± 0.036	0.266 ± 0.029	< 0.0001	0.938	< 0.001
Hippocampus	0.483 ± 0.054	0.350 ± 0.064	< 0.0001	0.955	< 0.001
Parahippocampal gyrus	0.451 ± 0.047	0.345 ± 0.046	< 0.0001	0.957	< 0.001
Pons	0.035 ± 0.004	0.031 ± 0.005	0.0074	0.733	0.004
Precuneus	0.324 ± 0.036	0.271 ± 0.032	< 0.0001	0.879	< 0.001
Putamen	0.400 ± 0.039	0.358 ± 0.039	0.0012	0.780	< 0.001

The maximum value is one, which is 100%. Data are presented as mean ± SD. AC = anterior cingulate, AUC = area under the ROC curve, GMV = gray matter volume, ROC = receiver operating characteristic