Primary Outcome from a cluster-randomized trial of three formats for delivering Community Reinforcement and Family Training (CRAFT) to the significant others of problem drinkers

Table 2 Treatment engagement at three- and six months’ follow-up, comparisons of CRAFT intervention groups

	Total study sample^a	CRAFT intervention				Pairwise comparisons of CRAFT intervention groups
	Total study sample^a	Group	Individual	Self-help	Group or individual	Group vs. Individual	Group vs. self-help	Individual vs. self-help	Group or individual vs. self-help
	N (%)	N (%)	N (%)	N (%)	N (%)	OR (95%-CI)	OR (95%-CI)	OR (95%-CI)	OR (95%-CI)
N	144	48	63	33	111
Treatment engagement at 3 months
No	107 (74)	34 (71)	45 (71)	28 (85)	79 (71)	Ref	Ref	Ref	Ref
Yes	37 (26)	14 (29)	18 (29)	5 (15)	32 (29)	1.03 (0.37, 2.83)	2.31 (0.57, 9.26)	2.24 (0.59, 8.57)	2.27 (0.80, 6.41)
Treatment engagement at 6 months		42	54	31	96
N	127	42	54	31	96
No	94 (74)	30 (71)	38 (70)	26 (84)	68 (71)	Ref	Ref	Ref	Ref
Yes	33 (26)	12 (29)	16 (30)	5 (16)	28 (29)	0.95 (0.32, 2.82)	2.08 (0.50, 8.68)	2.19 (0.56, 8.62)	2.14 (0.74, 6.16)

^aExcluding participants who answered “Don’t know” to question on the IP’s treatment engagement at three months’ follow-up: At 3 months n = 7 (5%); at six months n = 8 (6%)

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