Web-based interventions to decrease alcohol use in adolescents: a Delphi study about increasing effectiveness and reducing drop-out

Table 4 Results for items related to importance of several factors to reduce drop out of adolescents in a Web-based intervention to reduce binge drinking in 16- to 18-year-old adolescents

Strategy	Second round		Third round
	N = 56		N = 34
	Mdn	IQD	Mdn	IQD
1. Monetary incentives*	6	2.25	6	0.50
2. Non-monetary incentives (e.g., movie tickets)*	6	1	-	-
3. Reminder per e-mail*	6	2.75	6	0.25
4. Reminder per sms (text message)*	6	2	6	0.25
5. Engaging graphics*	6	3	6	1
6. Self-assessment with personalized feedback*	6	2	6	1
7. Use of highly relevant material*	6	2	6	0
8. Attractive design*	6	2	6	0.25
9. Inspiring topics*	6	2	6	0.25
10. Using language that relates to the adolescents*	6	2	6	1
11. Use as little text as you can get away with*	6	2	6	0.50
12. Use as much interaction as possible*	6	2	6	0.50
13. Use of humor	5	3	5	1.50
14. Engrossing website*	6	1.75	6	0
15. The use of the website should be addictive itself	4	3	4	1.75
16. Give points to earn (e.g., game component)	5	2	5	2
17. Set little goals to achieve during the intervention	5	1	-	-

Mdn: median scores.
IQD: interquartile deviation.
-: these items had an IQD ≤ 1 in the second round and did not reappear in the third round.
Strategies that are in italics and marked with an asterisk were identified as important (Mdn ≥ 6) and experts had reached consensus on (IQD ≤ 1).

ISSN: 1471-2458