Table 5.

Prediction of Drug Abuse in Adopted Children From the Genetic and Environmental Risk Scores by Logistic Regression Analysis

	Odds Ratio (95% CI)
	Univariate Analysis	Multivariate Analysis^a
Genetic risk score	1.13 (1.10–1.16)^b	1.12 (1.09–1.15)^b
Environmental risk score	1.10 (1.07–1.12)^b	1.09 (1.06–1.12)^b
Sex of adopted child (male vs female)	1.45 (1.26–1.67)^b	1.44 (1.24–1.66)^b
AFCAP from census data	0.96 (0.93–0.98)^c	1.00 (0.96–1.02)
Birth year of adopted child	1.02 (1.01–1.02)^c	0.99 (0.98–1.00)

Abbreviation: AFCAP, age at first cohabitation with adoptive parents.

Multivariate model includes adopted children's genetic and environmental risk scores, sex, AFCAP, and birth year.

P < .001.

P < .01.