title: Combining in-school and community-based media efforts: reducing marijuana and alcohol uptake among younger adolescents.
abstract: This study tests the impact of an in-school mediated communication campaign based on social marketing principles, in combination with a participatory, community-based media effort, on marijuana, alcohol and tobacco uptake among middle-school students. Eight media treatment and eight control communities throughout the US were randomly assigned to condition. Within both media treatment and media control communities, one school received a research-based prevention curriculum and one school did not, resulting in a crossed, split-plot design. Four waves of longitudinal data were collected over 2 years in each school and were analyzed using generalized linear mixed models to account for clustering effects. Youth in intervention communities (N = 4,216) showed fewer users at final post-test for marijuana [odds ratio (OR) = 0.50, P = 0.019], alcohol (OR = 0.40, P = 0.009) and cigarettes (OR = 0.49, P = 0.039), one-tailed. Growth trajectory results were significant for marijuana (P = 0.040), marginal for alcohol (P = 0.051) and non-significant for cigarettes (P = 0.114). Results suggest that an appropriately designed in-school and community-based media effort can reduce youth substance uptake. Effectiveness does not depend on the presence of an in-school prevention curriculum.
authors.affiliation: School of Communication, The Ohio State University, Columbus, 43210-1339, USA. slater.59@osu.edu
authors.forename: Michael D
authors.initials: MD
authors.lastname: Slater
authors.forename: Kathleen J
authors.initials: KJ
authors.lastname: Kelly
authors.forename: Ruth W
authors.initials: RW
authors.lastname: Edwards
authors.forename: Pamela J
authors.initials: PJ
authors.lastname: Thurman
authors.forename: Barbara A
authors.initials: BA
authors.lastname: Plested
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Keefe
authors.forename: Frank R
authors.initials: FR
authors.lastname: Lawrence
authors.forename: Kimberly L
authors.initials: KL
authors.lastname: Henry
mesh_terms: D000293:Adolescent; D000428:Alcohol Drinking / Q000453:epidemiology* / Q000517:prevention & control; D019058:Community Networks; D005260:Female; D006293:Health Promotion / Q000458:organization & administration*; D006801:Humans; D007407:Interviews as Topic; D008297:Male; D008385:Marijuana Smoking / Q000453:epidemiology* / Q000517:prevention & control; D012574:Schools; D040241:Social Marketing; D014481:United States / Q000453:epidemiology