Results of a multi-media multiple behavior obesity prevention program for adolescents.

Background: This study reports on effectiveness trial outcomes of Health in Motion, a computer tailored multiple behavior intervention for adolescents.

Methods: Using school as level of assignment, students (n=1800) from eight high schools in four states (RI, TN, MA, and NY) were stratified and randomly assigned to no treatment or a multi-media intervention for physical activity, fruit and vegetable consumption, and limited TV viewing between 2006 and 2007.

Results: Intervention effects on continuous outcomes, on movement to action and maintenance stages, and on stability within action and maintenance stages were evaluated using random effects modeling.