The effect of endorsement by local opinion leaders and testimonials from teachers on the dissemination of a web-based smoking prevention program.

The effect of endorsement by local opinion leaders and teacher testimonials on dissemination of a web-based program to prevent smoking was tested in a group-randomized 2 x 2 factorial post-test-only design with 394 junior and senior high schools. Schools were assigned to condition by region served by local tobacco control coalitions. Visits to the 'Consider This' (CT) website were recorded.