Conner, M., Grogan, S., West, R., Simms-Ellis, R., Scholtens, K., Sykes-Muskett, B., Cowap, L., Lawton, R., Armitage, C. J., Meads, D., Schmitt, L., Torgerson, C., & Siddiqi, K. (2019). Effectiveness and cost-effectiveness of repeated implementation intention formation on adolescent smoking initiation: A cluster randomized controlled trial. Journal of consulting and clinical psychology, 87(5), 422–432. https://doi.org/10.1037/ccp0000387 Evidence Rating: Emerging Intervention Components (click on component to see a list of all articles that use that intervention): Communication Tools, Presentation/meeting/information Session (Classroom), Intervention Description: The intervention in the study involved engaging adolescents with anti-smoking motivational messages and forming repeated implementation intentions on how to refuse offers of cigarettes. The intervention consisted of eight sessions, each led by a teacher and designed to be matched in duration and frequency across the intervention and control conditions. The sessions took place separately to data collection in classroom time and were designed to be age-appropriate and engaging. During these sessions, adolescents engaged with motivational materials (anti-smoking messages or pro-homework messages) and completed implementation intention sheets related to the target behavior (not smoking in the intervention condition; completing homework in the control condition) Intervention Results: Schools were randomly allocated (September–October 2012) to intervention (n = 25) or control (n = 23). At follow-up, among 6,155 baseline never smokers from 45 retained schools, ever smoking was significantly lower (RR = 0.83, 95% CI [0.71, 0.97], p = .016) in intervention (29.3%) compared with control (35.8%) and remained so controlling for demographics. Similar patterns observed for any smoking in last 30 days. Less consistent effects were observed for regular smoking and breath carbon monoxide levels. Economic analysis yielded an ICER of $134 per ever smoker avoided at age 15–16 years. Conclusion: This pragmatic trial supports the use of repeated implementation intentions about how to refuse the offer of a cigarette plus antismoking messages as an effective and cost-effective intervention to reduce smoking initiation in adolescents. Study Design: Cluster randomized controlled trial Setting: 36 Secondary schools in the UK Population of Focus: Researchers, public health professionals, educators, policymakers Sample Size: Roughly 3672 adolescents Age Range: ages 11-14 at baseline, 15-16 at follow up Access AbstractShow More
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