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Table 5 Results for items related to importance of several factors to reduce drop out of parents in a Web-based intervention to reduce binge drinking in 16- to 18-year-old adolescents

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

Strategy Second round Third round
  N = 56   N = 34  
  Mdn IQD Mdn IQD
1. Monetary incentives 5 3 5 1.75
2. Non-monetary incentives (e.g., movie tickets) 5 2 5 1
3. *Reminders per e-mail 6 2 6 1
4. *Reminders per sms (text message) 6 2.50 6 0.75
5. *Use of highly relevant material 6 2 6 0.50
6. *Interesting topics 6 2 6 0
7. *Ensuring that they realize that doing this will make a difference 6.5 1 - -
8. *Use of language that does not sound pompous or may be interpreted as condescending 6 2 6 1
9. *Make clear that it is understood that parents are the best experts when it comes to their children and that parents want what’s best for their children and that being a parent can be extremely difficult 6 2 6 0
10. *Recommendations need to be realistic and feasible 6.5 1 - -
11. Engrossing website 5 2 5 0.25
12. The use of the website should be addictive itself 3 3.50 3 2
13. Compelling set of lessons 5 2 5 1
14. *Make the need for the intervention salient to parents 6 2 6 0
15. Attractive design 5 1 - -
16. *Usability 7 1 - -
17. *Tailored 6 1 - -
18. Tips / reaction from an expert 5 2 5 1
19. Parents should have the possibility to communicate with each other (e.g., forum) 5 2 5 1.50
  1. Mdn: median scores.
  2. IQD: interquartile deviation.
  3. -: these items had an IQD ≤ 1 in the second round and did not reappear in the third round.
  4. Strategies that are in italics and marked with an asterisk were identified as important (Mdn ≥ 6) and experts had reached consensus on (IQD ≤ 1).