The Unplugged program has been trialled in over 8 European countries, including Austria, Belgium, Germany, Greece, Italy, Spain, Sweden and the Czech Republic. Some publications have found differential effects of the program according to gender, socioeconomic status and risk level.
Miovsky, M., Vonkova, H., Cablova, L., Gabrhelik, R. (2015). Cannabis use in children with individualized risk profiles: Predicting the effect of universal prevention intervention. Addictive Behaviours, 50, 110-116.
Vigna-Taglianti, F. D., Galanti, M. R., Burkhart, G., Caria, M. P., Vadrucci, S., Faggiano, F., & Group, E. U.-D. S. (2014). "Unplugged," a European school-based program for substance use prevention among adolescents: overview of results from the EU-Dap trial. New Directions in Youth Development, 141, 67-82.
Caria, M. P., Faggiano, F., Bellocco, R., & Galanti, M. R. (2011). Effects of a School-Based Prevention Program on European Adolescents' Patterns of Alcohol Use. Journal of Adolescent Health, 48, 182-188.
Caria, M. P., Faggiano, F., Bellocco, R., & Galanti, M. R. (2011). The influence of socioeconomic environment on the effectiveness of alcohol prevention among European students: a cluster randomized controlled trial. BMC Public Health, 11, 312.
A recent systematic review of school-based prevention programs found the Unplugged program to have demonstrated the best evidence of effectiveness across European evaluations:
Agabio, R., Trincas, G., Floris, F., Mura, G., Sancassiani, F., & Angermeyer, M. C. (2015). A systematic review of school-based alcohol and other drug prevention programs. Clinical practice and epidemiology in mental health, 11, 102-112.
The Unplugged program has also received a two-star rating from the National Centre for Education and Training on Addiction (NCETA) following their comprehensive systematic review of alcohol education programs.