Discrimination between Alzheimer's Disease and Mild Cognitive Impairment Using SOM and PSO-SVM

Table 6

Classification results (SVM).

Proportion	Volume; features	Volume features + PCA	Shape features	Shape features + PCA	Volume + shape features	Volume + shape features + PCA
AD (versus NC)
Accuracy	70.59%	70.59%	58.82%	64.71%	76.47%	82.35%
Sensitivity	70.59%	66.67%	66.67%	78.57%	76.47%	87.50%
Specificity	70.59%	68.75%	63.16%	70.00%	76.47%	83.33%
MCI (versus NC)
Accuracy	55.56%	61.11%	44.44%	50.00%	77.78%	83.33%
Sensitivity	66.67%	64.71%	61.54%	75.00%	77.78%	88.24%
Specificity	60.00%	61.11%	54.55%	60.87%	76.47%	83.33%