Table 3.

Biometrically decomposed cross-phenotypic correlations between random intercepts, slopes, and quadratic terms (obtained from latent growth-curve models) with 95% maximum likelihood-based confidence intervals.

Intercept: Intercept correlations
	Alcohol	Cannabis	Parents	Home
Cannabis	rg = 0.90
	rc = 0.85
	re = 0.59
Parents	rg = −0.26	rg = −0.35
	rc = −0.61	rc = −0.81
	re = −0.12	re = −0.03
Home	rg = 0.25	rg = −0.46	rg = −0.22
	rc = −0.44	rc = 0.25	rc = 0.09
	re = −0.07	re = 0.22	re = 0.35
School	rg = 0.40	rg = −0.35	rg = −0.48	rg = −0.08
	rc = −0.79	rc = −0.61	rc = 0.55	rc = 0.78
	re = −0.02	re = 0.54	re = 0.52	re = 0.98
Slope: Slope correlations
	Alcohol	Cannabis	Parents	Home
Cannabis	rg = −0.32
	rc = 0.70
	re = 0.67
Parents	rg = 0.07	rg = 0.01
	rc = 0.18	rc = −0.62
	re = −0.43	re = −0.15
Home	rg = −0.55	rg = −1.00	rg = −0.35
	rc = 0.29	rc = −0.14	rc = 0.42
	re = −0.29	re = −0.41	re = 0.47
School	rg = 0.74	rg = 0.52	rg = −0.37	rg = 0.69
	rc = 0.14	rc = −0.20	rc = 0.35	rc = 0.36
	re = −0.69	re = −0.66	re = 0.33	re = 0.15
Quadratic: Quadratic correlations
	Alcohol	Cannabis	Parents	Home
Cannabis	rg = 0.49
	rc = 0.90
	re = 0.67
Parents	rg = 0.30	rg = −0.17
	rc = −0.29	rc = −0.06
	re = −0.22	re = −0.09
Home	rg = −0.35	rg = −0.89	rg = 0.27
	rc = 0.15	rc = −0.91	rc = 0.04
	re = −0.19	re = −0.92	re = 0.29
School	rg = 0.73	rg = 0.77	rg = −0.72	rg = 0.66
	rc = −0.85	rc = 0.74	rc = 0.40	rc = 0.73
	re = −0.84	re = 0.81	re = −0.16	re = 0.79

Cross-phenotype biometric correlations obtained from ACE decomposed latent growth curve models. Included assessments were collected from ages 14 to 18. Biometric correlations represent the degree to which genetic, shared environmental, and nonshared environmental influences are shared between phenotypes. “Alcohol” and “Cannabis” are log transformed drinks per week and log transformed cannabis uses per week, “Parents” was the maximum parental monitoring score reported by any parental figure at a given timepoint, and “Home” and “School” represent the fraction of time spent at home between midnight and 5 am and the fraction of time spent at school between 8 am and 3 pm. Bolded values indicate correlations where 95% confidence intervals did not include 0.