Safer Sex Media Messages and Adolescent Sexual Behavior: 3-Year Follow-Up Results From Project iMPPACS

Objectives. We estimated the long-term (36-month) effects of Project iMPPACS, a multisite randomized controlled trial of mass media and small-group intervention for African American adolescents.Methods. We collected 6 waves of longitudinal data on program participants aged 14 to 17 years (n = 1139) in Providence, Rhode Island; Syracuse, New York; Columbia, South Carolina; and Macon, Georgia, 36 months (December 2009–December 2010) after the intervention began (August 2006–January 2008). Seemingly unrelated regressions at each wave estimated the effects of 3 types of mass media messages (the thematic mediators: selection, pleasure, and negotiation) on condom use intention and self-reported unprotected vaginal sex events.Results. All 3 mediators of behavior change that were introduced during the media intervention were sustained at the follow-up assessments at least 18 months after the intervention ended, with intention having the largest correlation. Unprotected vaginal sex increased with each wave of the ...