Table 5.

Dosage Model at 12-Month Follow Up for Primary Alcohol Use Outcomes Over the Past 30 Days

	Alcohol use (N=278)			Drinking frequency (N=277)				Drinking quantity (N=277)				Drunkenness (N=276)				Binge drinking (N=283)
	b	SE	eβ (Odds ratio)	b	SE	β	t	b	SE	β	t	b	SE	β	t	b	SE	β	t
Dosagea	−.99	.38	.37**	−.97	.29	−.39	−3.40**	−.24	.11	−.21	−2.20*	−.12	.07	−.17	–1.57	−.07	.05	−.17	−1.49
Condition	−1.27	.59	.28*	−1.46	.50	−.34	−2.91**	−.35	.19	−.17	–1.79†	−.09	.13	−.08	−.72	−.04	.09	−.05	−.44
Baseline	2.28	.43	9.75***	.47	.14	.19	3.26**	.59	.05	.61	12.56***	.71	.09	.44	8.04***	.30	.05	.34	6.13***
Teen gender	.16	.38	1.18	.13	.26	.03	.51	−.07	.10	−.03	−.71	−.03	.07	−.02	−.45	−.01	.05	−.01	−.22
Teen age	.60	.38	1.82	.13	.26	.03	.48	.04	.10	.02	.40	.11	.07	.09	1.59	.08	.05	.09	1.66†
Teen White	.20	.45	1.22	.12	.28	.02	.41	−.01	.11	.00	−.10	.12	.07	.09	1.65	.02	.05	.02	.36
Inverse Mills Ratio	.82	5.51	2.28	.60	3.87	.01	.16	.19	1.49	.01	.12	−.57	1.02	−.03	−.56	.95	.68	.08	1.39

Note. For the condition variable, 1 = control, 0 = experimental condition.

^aDosage effect sizes (Cohen’s d): alcohol use d = −.55, frequency d = −.41, quantity d = −.27, drunkenness d = −.19, binge drinking d = −.18

^†p < .10

^*p < .05

^**p < .01

^***p < .001