Table 3.

Change in success rates of adherence to the low-risk drinking guideline at the 1-month follow-up

		Experimental Condition		Control Condition
		n	% Success	n	% Success	OR	95% CI	NNTa	χ²	P Value
1-month follow-up
	Total sample EMb imputation	230	42.2	220	30.5	1.7	1.13-2.46	8.6	χ²1 = 6.7	.01
	Completers-only	207	41.5	195	29.2	1.7	1.14-2.60	8.1	χ²1 = 6.6	.01
	Total sample LOCFc imputation	230	37.4	220	25.9	1.7	1.14-2.56	8.7	χ²1 = 6.8	.01
6-month follow-up
	Total sample EMb imputation	230	45.7	220	37.3	1.4	0.97-2.06	11.9	χ²1 = 3.3	.07
	Completers-only	195	44.1	188	36.7	1.3	0.90-2.05	13.5	χ²1 = 2.2	.14
	Total sample LOCFc imputation	230	37.4	220	31.4	1.3	0.88-1.93	16.7	χ²1 = 1.8	.18

^a NNT = numbers needed to treat

^b EM imputation = imputation based on the expectation-maximization algorithm

^c LOCF imputation = imputation based on last observation carried forward