Table 2.

Effects of FBO, MIO, and MIF vs. AO on drinking behavior.

		Baseline vs. 3 months				Baseline vs. 6 months
Dependent Variable	Intervention comparison a	Estimate	S.E.	p	Effect size	Estimate	S.E.	p	Effect size
Composite	FBO vs. AO	0.049	0.134	0.71	0.043	−0.086	0.156	0.58	−0.093
	MIO vs. AO	0.131	0.133	0.33	0.186	0.044	0.153	0.77	0.075
	MIF vs. AO	−0.219	0.128	0.089	−0.307	−0.488	0.149	0.001	−0.535
Drinks per week	FBO vs. AO	1.49	1.71	0.39	0.134	0.53	2.09	0.80	0.076
	MIO vs. AO	2.60	1.70	0.13	0.308	0.32	2.05	0.88	0.096
	MIF vs. AO	−3.28	1.64	0.046	−0.351	−5.26	2.00	0.009	−0.412
Peak BAC	FBO vs. AO	0.009	0.016	0.58	0.082	0.003	0.018	0.88	−0.021
	MIO vs. AO	0.011	0.015	0.47	0.132	0.010	0.017	0.57	0.101
	MIF vs. AO	−0.019	0.015	0.21	−0.211	−0.039	0.017	0.021	−0.374
Alcohol-related problems	FBO vs. AO	−0.17	0.93	0.85	−0.111	−1.78	1.03	0.086	−0.341
	MIO vs. AO	−0.16	0.92	0.86	−0.052	−0.32	1.01	0.76	−0.052
	MIF vs. AO	−0.45	0.89	0.62	−0.135	−2.32	0.99	0.020	−0.428

^aFBO = Feedback only; MIO = Motivational interviewing only; MIF = Motivational interviewing with feedback; AO = Assessment only