Table 2.

Drinking Outcomes across Assessments

Outcome variable		Assessment			ES	group	time	group x time
Outcome variable		2-week	2-month	4-month	ES	p-value	p-value	p-value
Drinking days per week	ATIVR	1.3 ± 0.2	1.4 ± 0.2	1.4 ± 0.2	.17	.92	.01	.04
Drinking days per week	Control^*	1.1 ± 0.2	1.4 ± 0.2	1.6 ± 0.2
Drinks per week	ATIVR	5.3 ± 1.0	6.7 ± 1.0	6.1 ± 1.0	.01	.39	.004	.27
Drinks per week	Control	3.1 ± 1.0	5.8 ± 1.0	6.2 ± 1.0
Drinks per drinking day	ATIVR	3.5 ± 0.4	4.0 ± 0.4	3.9 ± 0.4	.08	.81	.006	.45
Drinks per drinking day	Control	3.2 ± 0.4	4.3 ± 0.4	4.2 ± 0.4
Percent reported drinking (last 30 days)	ATIVR	N/A	57 ± 6	47 ± 6	.04	.88	.03	.28
Percent reported drinking (last 30 days)	Control	N/A	53 ± 6	49 ± 6
Percent reported drinking heavily^a (last 30 days)	ATIVR	N/A	31 ± 6	21 ± 5	.04	.91	.03	.42
Percent reported drinking heavily^a (last 30 days)	Control	N/A	28 ± 5	23 ± 5

Note. Tabled values are least square means ± standard error based on analyses of covariance, unless otherwise noted. ATIVR = Automated Telephone Interactive Voice Response. ES = Effect size at 4-month assessment, reported as Cohen’s d.

Drinking heavily refers to meeting National Institute on Alcohol Abuse and Alcoholism threshold for high-risk drinking (5+/4+ drinks in a day for men/women).

p<.05 for change over time within group.