Table 2. Cholesky decomposition of heritability, shared environment, and non-shared environment for conduct problems (CP), from age 4 years to age 16.

	A1	A2	A3	A4	Total a2
CP 4y	.60(.55–.64)				.60(.55–.64)
CP 7y	.24(.19–.29)	.40(.34–.46)			.64(.57–.72)
CP 12y	.16(.12–.21)	.12(.08–.18)	.34(.27–.41)		.62(.53–.70)
CP 16y	.14(.10–.18)	.06(.04–.11)	.10(.05–.16)	.43(.37–.48)	.73(.69–.78)
	C1	C2	C3	C4	Total c2
CP 4y	.04(.01–.08)				.04(.01–.08)
CP 7y	.10(.04–.17)	.02(.00–.08)			.12(.06–.18)
CP 12y	.12(.04–.20)	.05(.00–.13)	.00(.00–.06)		.17(.10–.24)
CP 16y	.01(.00–.05)	.00(–.03–.01)	.00(–.08–.00)	.00(–.03–.00)	.01(.00–.04)
	E1	E2	E3	E4	Total e2
CP 4y	.36(.33–.38)				.36(.33–.38)
CP 7y	.01(.00–.01)	.23(.21–.25)			.24(.22–.26)
CP 12y	.00(.00–.01)	.01(.00–.01)	.20(.18–.23)		.21(.19–.24)
CP 16y	.00(.00–.00)	.00(.00–.01)	.01(.01–.02)	.24(.21–.27)	.26(.22–.29)

Note. The values presented in the table are standardized components of variance. For instance, 12% of the total variance at 12 years comes from the genetic factor A2, which corresponds to age 7 years. The total c² at 12 years (17%) corresponds to sum of shared environment components coming from 4, 7, 12, and 16 years. Finally, a² + c² + e² = 1 at each age (last column, e.g. at 4 years .60 + .04 + .36). Significant estimates are in bold.