Mean values and Pearson correlations between age and DTI metrics in the basal ganglia (MD, λ₁, λ₂₃ × 10⁻⁴ mm²/s)

Region	MD (Mean ± SD)	FA (Mean ± SD)	λ1 (Mean ± SD)	λ23 (Mean ± SD)
Caudate	6.88 ± 0.42, r = −0.319, P = .007	0.24 ± 0.03, r = 0.178, P = .138	8.57 ± 0.46, r = −0.299, P = .011	6.03 ± 0.43, r = −0.312, P = .008
Putamen	6.45 ± 0.36, r = −0.410, P < .001	0.23 ± 0.04, r = 0.535, P < .001	7.93 ± 0.27, r = −0.200, P = .094	5.71 ± 0.43, r = −0.451, P < .001
Globus pallidus	6.00 ± 0.49, r = −0.142, P = .238	0.36 ± 0.04, r = 0.276, P = .020	8.16 ± 0.42, r = −0.117, P = .329	4.89 ± 0.45, r = −0.215, P = .072
Prefrontal	7.18 ± 0.51, r = 0.314, P = .008	0.35 ± 0.05, r = −0.391, P = .001	9.82 ± 0.65, r = 0.053, P = .663	5.86 ± 0.56, r = 0.403, P < .001
Genu	6.98 ± 0.65, r = 0.319, P = .007	0.65 ± 0.06, r = −0.307, P = .009	12.97 ± 1.19, r = 0.139, P = .249	3.98 ± 0.65, r = 0.353, P = .003
Splenium	6.77 ± 0.67, r = −0.153, P = .202	0.75 ± 0.05, r = −0.008, P = .946	14.16 ± 1.51, r = −0.156, P = .194	3.06 ± 0.56, r = −0.066, P = .585
Internal capsule	6.43 ± 0.51, r = −0.185, P = .123	0.69 ± 0.04, r = 0.013, P = .914	12.56 ± 0.85, r = −0.231, P = .053	3.36 ± 0.46, r = −0.090, P = .458