Table 1.

Demographic characteristics of the sample (N = 192, 48.4% male) at T1 and T2

	T1	T2
Age (y)	14.32 (3.59)	16.28 (3.61)
Age range	8.01–24.55	9.92–26.62
Estimated IQ	110.78 (9.81)	108.23 (10.20)
AUC (normalized)	0.42 (0.28)	0.47 (0.25)
FS-tract FA	0.329 (0.020)	0.333 (0.020)
FS-tract MD (mm2/s)	0.00080 (0.00002)	0.00080 (0.00002)

Data are presented as mean (SD). FS-tract, Frontostriatal tract.