Table 1.

Sample characteristics by control and intervention groups and descriptive statistics of the implementation parameters for the intervention group at 3-months follow-up.

	Control group n = 714		Intervention group n = 641
	n	%	n	%
Boys	322	45.1	301	47.0
Girls	392	54.9	340	53.0
Grade 8	348	48.7	338	52.7
Grade 9	366	51.3	303	47.3
Age, mean (SD)	14.7	(±0.6)	14.8	(±0.7)
Outcome variables
Overestimation of peer lifetime binge drinking	323	45.8	241	38.1
Binge drinking in the last 30 days, mean (SD)	1.1	(±2.4)	1.0	(±2.3)
Alcohol-related harmsa, mean (SD)	1.6	(±2.2)	1.4	(±2.2)
Participation in The GOOD Life elements
Feedback session			523	81.6
Posters			343	53.5
Web-application			211	32.9
Level of self-reported exposure to The GOOD Life
Elements
One element			159	29.6
Two elements			220	41.0
Three elements			158	29.4
Posters
1–2 posters			67	19.9
3–4 posters			101	30.0
5–6 posters			107	31.8
7–10 posters			62	18.4
Level of satisfaction with The GOOD Life
Feedback session
Low satisfaction			35	6.8
Okay satisfaction			223	43.6
High satisfaction			253	49.5
Posters
Low satisfaction			26	7.7
Okay satisfaction			159	47.2
High satisfaction			152	45.1
Web-application
Low satisfaction			12	5.8
Okay satisfaction			105	50.7
High satisfaction			90	43.5
Level of recall of The GOOD Life
Feedback session
Low recall			295	62.9
High recall			174	37.1
Posters
Low recall			166	51.9
High recall			154	48.1
Web-application
Low recall			121	64.4
High recall			67	35.6

^aOnly measured among 540 pupils with lifetime alcohol use due to an error in the electronic questionnaire in the 2016 data collection.