Table 6.

The R² values  ±  standard deviation based on training sets with and without low-quality data applied to 100 bootstrapped test sets generated from 30% of the full sample. 95% confidence intervals are indicated in square brackets. Z represents the difference in r values expressed in standard deviations, accounting for the correlated samples (Eq. (1)). MM = multimodal, GM = gray matter, WM = white matter, FC = functional connectivity.

Model	${\mathrm{R}}_{full}^2$	${\mathrm{R}}_{LQD-excluded}^2$	Z	p	% LQD removed
MM	0.228  ±  0.060	0.250  ±  0.063	-1.416	0.157	8.90
GM	0.224  ±  0.065	0.271  ±  0.065	-2.586	0.009	6.32
WM	0.203  ±  0.066	0.184  ±  0.062	1.097	0.273	7.26
FC	-0.011  ±  0.040	-0.019  ±  0.039	0.299	0.765	7.96