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

Published in final edited form as: J Appl Soc Psychol. 2013 Aug 4;43(9):1784–1798. doi: 10.1111/jasp.12126

Table 3.

Summary of multi-level repeated measures analysis for prediction of adolescents’ alcohol use

Variable	β	SE	b
Prevention program condition	.13	.12	.13
Adolescents’ baseline alcohol use	.62^**	.06	.47^**
Parents’ expectations about their adolescents’ likelihood of drinking alcohol	.12^**	.04	.10^**
Parents’ perceptions about the value of involving parents in adolescent substance use prevention	.02	.09	.03
Prevention program condition × parents’ perceptions	−1.21^**	.14	−.38^**
Time	.25^**	.07	.25^**

Note: N = 321. The dependent variable was adolescents’ alcohol use. β refers to the standardized coefficient. SE refers to the standard error. b refers to the unstandardized coefficient. Prevention program condition was coded as 1 and 0 for families assigned to the prevention program that did and did not systematically involve parents, respectively. The standardized estimate for prevention program condition reflects the standard deviation change in adolescents’ alcohol use across the two prevention program conditions. The standardized estimate for time reflects the standard deviation change in adolescents’ alcohol use that occurred from the posttest to the 18-month follow-up.

p ≤ .05

^**

p ≤ .01