Table 4.

Kruskal–Wallis (K–W) analysis of variance and post hoc Mann–Whitney (M–W) comparisons.

ROI	Kruskal–Wallis	Mann–Whitney
	All three cohorts (H-statistic)	Z-scores from pair-wise comparison
		PB–NS	PB–AQ	NS–AQ
Visual cortex (AAL-template)	6.53	2.34	0.28	2.29
PET-derived	3.39	1.92	0.38	1.47
Whole brain fiber tracts (TBSS)	3.76	2.13	1.61	0.15
Juelich OR	6.68	2.56*	1.51	1.62
Juelich OR ∩ TBSS fibers	7.16*	2.56*	1.32	1.92

The p-value significance threshold (α), were set at 0.025 for K–W test, and 0.0083 for M–W test K–W analysis of PET-derived and whole brain fiber tracts showed no statistical significance between PB, AQ, and NS groups. Although M–W comparing PB–NS showed a higher difference (Z = 1.92 and Z = 2.13), these did not meet the threshold for statistical significance.