Theory-driven evaluation design is applied to assess whether a tobacco prevention program 'Dentists Fighting Nicotine Dependence' (DFND) program could affect the determinants such as students' attitude, subjective norm, knowledge and perceived behavioral control and whether those determinants could actually decrease the number of students initiating tobacco use among adolescents in Saudi Arabia.#Theapplicationoftheorybasedevaluation #2011Conference #ProgramTheoryandTheoryDrivenEvaluation #HealthEvaluation