Research Design & Number of Studies
The best evidence identified, for children in the 6-12 age range, comes from two Randomized Controlled Trials (RCT), one undertaken by the programme developer (Kellam et al., 2008) and one undertaken externally (van Lier et al., 2009). The first trial population included children commencing the intervention aged 6 to 7 years with two years exposure, followed up in young adulthood aged 19 to 21 years, across 19 schools (n=1196 children) and the second trial population included children aged 7 to 9 years (n=666 children) with assessments of substance use from age 10 to 13 years (n=477 children) across 13 schools.
Outcomes Achieved
Child Outcomes
- At the 14 year follow-up point (young adulthood), significant and substantial impact across all of the externalizing behaviours was found particularly in males in first grade who were more aggressive, disruptive, in reduced drug and alcohol abuse/dependence disorders, regular smoking, and antisocial personality disorder compared with participants in the control group (Kellam et al., 2008).
- Children who participated in the GBG treatment had a lower probability of onset of tobacco use from age 10 to 13 years, this effect remained significant while controlling for male gender and pre-intervention levels of aggressive behaviour (van Lier et al., 2009).
Parent Outcomes
- No parent outcomes were identified.
Key References
Kellam, S.G., Hendricks Brown, C., Poduska, J.M., Ialongo, N.S., Wang, W., Toyinbo, P., Petras, H., Ford, C., Windham, A., & Wilcox, H.C. (2008) Effects of a Universal Classroom Behavior Management Program in First and Second Grades on Young Adult Behavioral, Psychiatric, and Social Outcomes. Drug and Alcohol Dependence, 95S (1), S5–S28.
van Lier, P.A., Huizink, A., & Crijnen, A. (2009) Impact of a preventive intervention targeting childhood disruptive behavior problems on tobacco and alcohol initiation from age 10 to 13 years. Drug and Alcohol Dependence, 100 (3), pp. 228–233.