. Author manuscript; available in PMC: 2013 May 1.

Published in final edited form as: Behav Genet. 2011 Oct 30;42(3):345–353. doi: 10.1007/s10519-011-9516-8

Table 4.

Univariate biometric model fitting of parental attitudes toward substance use and household adult substance use

	a²	95% CI	c²	95% CI	e²	95% CI	-2LL
Age corrected model
Parental attitudes	22	0; 48	22	0; 43	56	50; 64	6822.7
Household use	6	0; 19	72	60; 80	22	19; 26	7639.2
Non-age corrected model
Parental attitudes	7	0; 20	70	60; 77	22	20; 27	7948.0
Household use	3	2; 3	87	81; 89	10	8; 12	8357.3

a² additive genetic variance, 95% CI 95% confidence interval, c² shared environmental variance, e² unique environmental variance, –2LL log likelihood. Sums may not equal 100% due to rounding error