Table 2.

Correspondence between TLFB and daily reports at the weekly level

	Models predicting alcohol use outcomes
	Drinking days				Heavy drinking days				Total drinks				Drinks per drinking day
Fixed effects	B	SE	t	p	B	SE	t	p	B	SE	t	p	B	SE	t	p
Intercept	1.57	0.11	13.92	<.001	0.98	0.10	9.99	<.001	7.96	0.72	11.03	<.001	3.98	0.31	12.72	<.001
Report type (L1)	0.22	0.05	4.16	<.001	0.07	0.05	1.45	.151	1.09	0.31	3.55	<.001	0.30	0.15	2.04	.043
Week no. (L2)	-0.12	0.03	-3.50	<.001	-0.06	0.03	-2.15	.033	-0.53	0.22	-2.37	.018	-0.05	0.11	-0.49	.628
Time between methods (L3)	-0.01	0.01	-0.89	.378	0.00	0.01	0.67	.503	-0.00	0.06	-0.06	.949	0.01	0.03	0.43	.666
Baseline typical weekly drinks (L3)	0.03	0.01	3.07	.003	0.05	0.01	4.60	<.001	0.41	0.09	4.69	<.001	0.15	0.03	4.54	<.001

	Models predicting alcohol consequences outcomes
	No. of positive consequences				No. of negative consequences
	B	SE	t	p	B	SE	t	p
Intercept	4.42	0.38	11.70	<.001	4.62	0.40	11.65	<.001
Report type (L1)	1.11	0.20	5.51	<.001	1.13	0.21	5.32	<.001
Week no. (L2)	-0.51	0.11	-4.68	<.001	-0.49	0.11	-4.30	<.001
Time between methods (L3)	-0.06	0.03	-2.25	.027	-0.06	0.03	-2.24	.027
Baseline typical weekly drinks (L3)	0.08	0.05	1.72	.090	0.09	0.05	1.71	.091

Notes: TLFB = Timeline Followback; no. = number; L1= Modeled at Level 1 portion of the model; L2 = Level 2; L3 = Level 3; report type coded 0 = daily report, 1 = TLFB. As such, intercept = outcome reported daily and effect of report type = difference in the outcome between daily and TLFB report; bold effects represent significant differences between methods (p < .01); Weekly models included a random slope effect of report type on all outcomes with the exception of drinks per drinking day, for which there was instead a significant random slope effect of study week.