eTable 1. Correlation between the severity of sensation-seeking/impulsiveness and frequency/intensity of binge drinking.

	Frequency of at least monthly binge drinking		No. of drinks consumed per occasion
	Preintervention questionnaire	Postintervention questionnaire	Preintervention questionnaire	Postintervention questionnaire
	%	%	M (SD)	M (SD)
Sensation-seeking and impulsiveness
Low/below median	22.5%	28.6%	3.76 (2.50)	4.20 (2.61)
High/above median	38.0 %	44.6%	4.89 (2.86)	5.28 (2.78)
	Χ² (df); p	Χ² (df); p	t (df); p	t (df); p
Test for difference between groups	107.8 (1) <0.001	103.6 (1) <0.001	11.3 (2 862) <0.001	11.4 (3 164) <0.001

df: Degrees of freedom; M: Mean; p: Observed significance level; SD: Standard deviation