Table 2.

Bivariate correlations and descriptive statistics by prevention program condition

Variable	(1)	(2)	(3)	(4)	(5)
(1) Adolescents’ baseline alcohol use	—	.71**	.36**	.11	−.01
(2) Adolescents’ alcohol use at the posttest	.39**	—	.47**	.23**	.00
(3) Adolescents’ alcohol use at the 18-month follow-up	.31**	.53**	—	.25**	.04
(4) Parents’ expectations about their adolescents’ likelihood of drinking alcohol	.37**	.18*	.26**	—	−.03
(5) Parents’ perceptions about the value of involving parents in adolescent  substance use prevention	.17*	−.10	−.13	.06	—
No parental involvement M SD	.15 .67	.26 .86	.54 1.20	3.44 1.32	6.33 .66
Parental involvement M SD	.29 .94	.46 1.25	.68 1.50	3.13 1.19	6.34 .73

Note: N = 321. Correlations above the diagonal are based on data from families in the prevention program condition that did not systematically involve parents. Correlations below the diagonal are based on data from families in the prevention program condition that did systematically involve parents. M refers to the mean. SD refers to the standard deviation.

^*p ≤ .05

^**p ≤ .01