Objectives :To test whether high school students’participation in advocacy activities related to the advertising, availability, and use of tobacco in their communities would prevent or reduce their own tobacco use.
Design: Ten continuation high schools in northern California, randomly assigned to a semester-long program in which students either carried out advocacy activities to counter environmental-level smoking influences in their communities (treatment) or learned about drug and alcohol abuse prevention (control).
Participants: Eleventh and 12th grade high school students ;5 (advocacy) treatment and 5 control schools over 4 semesters from 2000 through 2002.