Table 1.

Demographic characteristics.

	T1		T2		T3
	n		n		n
Age MRI (Mean, SD)	842	7.96 (1)	2,708	10.1 (0.57)	1,904	14 (0.6)
Age CBCL (Mean, SD)	842	6.06 (0.45)	2,708	9.7 (0.28)	1,904	13.52 (0.36)
Measures in %
Child national origin
Dutch	596	70.78%	1,771	65.4%	1,199	62.97%
Non Dutch	246	29.22%	937	34.6%	705	37.03%
Maternal education
Low	30	3.56%	47	1.74%	57	2.99%
Middle	335	39.79%	986	36.41%	708	37.18%
High	477	56.65%	1675	61.85%	1139	59.82%
Household income
< €2,000.- per month	196	23.28%	528	19.5%	404	21.22%
>€2,000.- per month	646	76.72%	2,180	80.5%	1,500	78.78%
Measures in median, IQR
Handedness	842	0.82 (0.64–0.92)	2708	0.83 (0.67–1)	1,904	0.83 (0.67–1)
Child psychopathology
Internalizing	842	6 (2–11)	2,708	3 (1–7)	1,904	4 (1–8)
Externalizing	842	8 (3–15)	2,708	2 (0–5)	1,904	2 (0–6)
Dysregulation Profile	842	10 (4–18)	2,708	6 (3–11)	1,904	6 (3-12)