Table 5.

Magnitude of genetic and environmental influences

	A	C	E
SAV at adolescence (wave 1)	0.43 (0.05, 0.94)	0.30 (0.00, 0.68)	0.27 (0.04, 0.48)
SAV at young adulthood (wave 2)	0.63 (0.21, 0.83)	0.05 (0.00, 0.36)	0.32 (0.14, 0.54)
Correlation between factors	1.00 (0.55, 1.00)	1.00 (−1.00, 1.00)	0.23 (−0.29, 0.70)
% of covariance explained by:	74 %	17 %	9 %

Note Table shows the proportion of variation in the common liability to alcohol, tobacco, and cannabis DSM-IV dependence symptoms (as measured by the factor score) attributable to additive genetic (A), shared environment (C) and non-shared environmental factors (E). Covariance and correlation estimates were derived from the full bivariate model