Table 3 Paired samples t tests for differences between baseline and follow-up AUDIT scores, AUDIT-C scores and AUDIT-3 scores, by group

	Downward change in mean (95% CI)	t test	p Value
Intervention
AUDIT score base to follow-up	3.3 (2.1 to 4.8)	5.1	p<0.001*
AUDIT-C score base to follow-up	0.8 (0.18 to 1.4)	2.6	p = 0.01*
AUDIT-3 base to follow-up	0.1 (−0.02 to 0.02)	1.7	p = 0.09
Control
AUDIT score base to follow-up	2.2 (1.06 to 3.4)	3.3	p<0.001*
AUDIT-C score base to follow-up	0.4 (−0.06 to 0.8)	1.7	p = 0.08
AUDIT-3 base to follow-up	0.0 (−0.14 to 0.14)	0.0	p = 1.0