Results further suggest that each TF component performed at least as well as P3 in differentiating many of the diagnostic groups from controls. Inspection of Table 3 shows that the amount of variance in group membership explained by each TF component was equal to or exceeded that of P3 in most cases. Pseudo-R2 was greater in magnitude for TF components (maximum, 0.27; Median, 0.15) than for P3 amplitude (maximum, 0.15; Median, 0.11) in 26 out of 30 comparisons. Notably, PCs 2, 3, and 4, the delta frequency components, consistently accounted for greater portions of variance than did P3.
