Table 2.

Comparison of Social-Only vs. Solitary Users on Substance Use Variables, Adjusting for Socio-demographic Characteristics (Model A) and Past Month Use (Model B)

Variable	Alcohol				Marijuana
Variable	OR	95% CI			OR	95% CI
Older sibling use
Model A	1.61	1.00	2.62	^#
Model B	1.02	0.60	1.72
Adult use
Model A	1.57	1.04	2.39	^*	2.26	1.05	4.86	^*
Model B	1.25	0.81	1.92		2.07	0.98	4.36	^#

	beta	95% CI			beta	95% CI

Normative beliefs
Model A	12.55	7.68	17.42	^‡	2.37	−6.07	10.81
Model B	2.81	0.67	4.94	^†	2.35	−0.51	5.21
Negative consequences
Model A	0.35	0.22	0.48	^‡	0.48	0.21	0.76	^‡
Model B	0.24	0.12	0.36	^‡	0.37	0.15	0.60	^†
With kids that use
Model A	0.17	0.11	0.23	^‡	0.20	0.06	0.33	^†
Model B	0.03	0.01	0.05	^‡	0.03	0.01	0.05	^†
Positive expectancies
Model A	0.54	0.37	0.71	^‡	0.65	0.38	0.91	^‡
Model B	0.35	0.24	0.46	^‡	0.35	0.20	0.51	^‡
Resistance self-efficacy
Model A	−0.79	−0.95	−0.63	^‡	−0.87	−1.14	−0.67	^‡
Model B	−0.40	−0.49	−0.31	^‡	−0.37	−0.47	−0.26	^‡

Note. Model A adjusts for CHOICE group membership (intervention vs. control) and demographics (gender, father’s education), whereas Model B additionally adjusts for any past month use. Odds ratios are reported for older sibling and important adult use; otherwise, unstandardized regression coefficients are reported. Multivariable analyses were conducted only if bivariate associations were significant at p < .10.

p < .10.

p < .05.

^†

p < .01.

^‡

p < .001.