Table 3.

The number of features derived from the rs-FC data utilized in various steps of the analysis.

Analysis step	Number of features	Feature space
Original features	27,730	rs-FC
After outlier removal	17,614	rs-FC
After univariate filtering	679	rs-FC
After principal component analysis	39	reduced
Chosen principal components for classification	25	reduced

The feature space indicates whether the corresponding features were measures of functional connectivity, i.e., rs-FC space or principal components comprised of linear combination of multiple rs-FC features, i.e., reduced space.