. Author manuscript; available in PMC: 2014 Sep 1.

Published in final edited form as: Behav Genet. 2013 Aug 14;43(5):10.1007/s10519-013-9606-x. doi: 10.1007/s10519-013-9606-x

Table 1.

Proportion of variance accounted for by covariates, and estimates of variance components (95% CI) from GCTA and biometric analysis of the five covariate-adjusted clinical phenotypes

Phenotype	Covariates	GCTA	Biometric Estimates
Phenotype	Covariates	GCTA	a²	c²	e²
Nicotine	.13	.19 (.00, .39)	.55 (.43, .67)	.18 (.06, .29)	.27 (.25, .30)
Alcohol Consumption	.28	.14 (.00, .34)	.49 (.37, .60)	.24 (.13, .34)	.27 (.25, .30)
Alcohol Dependence	.24	.08 (.00, .29)	.70 (.62, .73)	.00 (.00, .07)	.30 (.27, .33)
Illicit Drugs	.14	.37 (.17, .57)	.55 (.45, .67)	.16 (.05, .26)	.28 (.26, .31)
Behavioral Disinhibition	.19	.28 (.08, .48)	.70 (.59, .77)	.05 (.00, .16)	.25 (.23, .28)