Table A1.

Intent-to-treat (ITT) analysis (N = 121)

Repeated measures model effects	Total AUDIT	Drinks per drinking day	Drinking days in 14 days	Heavy episodic drinking
ITT Intervention main effect	F = 1.93 (p = .1676)	F = 6.07 (p = .0152)	F = 4.22 (p = .0421)	F = 1.16 (p = .2828)
Time main effect	F = 11.81 (p < .0001)	F = 8.44 (p = .0004)	F = 10.00 (p < .0001)	F = 16.18 (p < .0001)
ITT Intervention x Time interaction	F = 0.05 (p = .9473)	F = 0.67 (p = .5119)	F = 1.57 (p = .2117)	F = 0.12 (p = .8846)
Model-based least squares means	Baseline	2 Weeks FU	8 Weeks FU	Average Row
Total AUDIT
Intervention	19.05	16.70	15.58	17.11
Control	21.55	18.92	18.15	19.54
Average column	20.30	17.81	16.86
Drinks per drinking day
Intervention	2.89	1.96	1.75	2.20
Control	4.46	3.59	3.81	3.95
Average column	3.67	2.77	2.78
Drinking days in 14 days
Intervention	5.71	4.54	4.17	4.81
Control	7.07	5.75	6.45	6.42
Average column	6.39	5.14	5.31
Heavy episodic drinking
Intervention	2.36	2.17	1.82	2.12
Control	2.64	2.36	2.01	2.33
Average column	2.50	2.26	1.92
Pairwise contrasts for time effect	Total AUDIT	Drinks per drinking day	Drinking days in 14 days	Heavy episodic drinking
Baseline vs. 2 Weeks FU	t = 3.64 (p = .0004)	t = 3.98 (p = .0001)	t = 4.38 (p < .0001)	t = 2.55 (p = .0120)
Baseline vs. 8 Weeks FU	t = 4.84 (p < .0001)	t = 3.42 (p = .0009)	t = 3.10 (p = .0024)	t = 5.65 (p < .0001)
2 Weeks FU vs. 8 Weeks FU	t = 1.71 (p = .0900)	t = −0.02 (p = .9807)	t = −0.55 (p = .5826)	t = 3.70 (p = .0003)

Degrees of freedom for F-tests are df = 1,119 for the ITT intervention main effect, and df = 2,119 for both the time main and ITT intervention x time interaction effects. Degrees of freedom for all pairwise contrast t-tests are df = 119. N = 77 for the ITT intervention group and N = 44 for the ITT control group.