Table 6. Classification results for three classes—control, mild cognitive impairment, and Alzheimer’s disease.

The best results for each test metric is indicated in bold italics.

Model	Train accuracy	Validation accuracy	Test accuracy	Test sensitivity	Test specificity
Siamese 3D	0.6250	0.5645	0.5625	0.3585	0.6664
ViT	0.6120	0.5780	0.5510	0.4260	0.6650
DenseNet	0.5964	0.5820	0.5446	0.4199	0.6861
EfficientNet B7	0.5443	0.5703	0.5893	0.4163	0.6765