Table 3.

Pearson partial correlations between regional mT2w signal and age across the whole group (with FD and volume as covariates) and regression analyses testing whether an ADHD diagnosis (Dx*Age) or diagnosis-by-sex interaction (Dx*Sex*Age) moderated the relationship between age and mT2w signal

ROI	Hemisphere			Dx*Age			Dx*Sex*Age
		r	p	β	SE	p	β	SE	p
Limbic Striatum	Left	− 0.190**	0.002	0.015	0.017	0.387	− 0.009	0.019	0.634
	Right	− 0.196**	0.001	− 0.001	0.015	0.945	0.011	0.017	0.494
Executive Striatum	Left	− 0.134*	0.028	0.013	0.014	0.347	− 0.017	0.016	0.261
	Right	− 0.076	0.210	0.004	0.012	0.737	− 0.003	0.014	0.804
Sensorimotor Striatum	Left	− 0.130*	0.033	0.005	0.013	0.703	− 0.001	0.014	0.969
	Right	− 0.106	0.080	− 0.007	0.011	0.528	− 0.018	0.013	0.151
Globus Pallidus	Left	− 0.437**	< 0.001	0.019	0.013	0.147	− 0.017	0.015	0.245
	Right	− 0.437**	< 0.001	0.010	0.013	0.442	0.001	0.015	0.935

^*p < 0.05

^**p < 0.01