The influence of socioeconomic environment on the effectiveness of alcohol prevention among European students: a cluster randomized controlled trial

Table 2 Programme effects by socioeconomic level of the school area from multilevel models

Socioeconomic level of the school area
	Low		Medium		High		Whole sample
	(n = 1819)		(n = 1742)		(n = 1980)		(n = 5541)
	OR	95%CI	OR	95%CI	OR	95%CI	OR	95%CI
Any current drinking	0.84	0.64-1.09	1.08	0.77-1.52	0.93	0.69-1.24	0.95	0.81-1.12
Weekly drinking	0.83	0.61-1.12	1.14	0.82-1.58	0.91	0.69-1.21	0.92	0.77-1.09
Intention to drink in the next year	0.76	0.58-1.00	1.12	0.83-1.50	1.18	0.91-1.53	0.99	0.85-1.16
Episodes of drunkenness in the past 30 days	0.63	0.47-0.88	0.92	0.65-1.31	0.88	0.62-1.23	0.79	0.65-0.95
Intention to get drunk in the next year	0.61	0.48-0.79	1.00	0.75-1.32	0.96	0.73-1.26	0.82	0.71-0.96
Alcohol-related problem behaviour in the past 12 months	0.68	0.44-1.06	0.97	0.63-1.49	0.85	0.58-1.25	0.78	0.62-0.98

Results from multilevel models adjusted for gender, age, family living situation and baseline status of the outcome: odds ratios (OR) and 95% confidence interval (95%CI) of alcohol-related behaviour for students in the intervention group compared to the controls, by socioeconomic level of the school area. The EU-Dap Study, 18-month follow-up.

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