Table 6.

The calculated accuracy of LDA with leave-one-out classification using 3 features for separating PCS with no depression versus PCS & mild depression versus PCS & moderate/severe depression versus healthy control.

	Accuracy	#Features	Features
4 groups classification	73.9 %	3	AP-area, PPT area and IH33
3 groups classification*	81.5%	3	AP-area, PPT area and IH33
3 groups classification*	80%	2	AP-area and PPT area
3 groups classification*	75.4%	2	PPT area and IH33
3 groups classification*	64.6%	2	AP-area and IH33

*Without including PCS & mild depression subgroup. The 3 group classification accuracy was calculated as well using 3 and 2 features when the PCS & mild depression subgroup was excluded.