Examining Potential Mechanisms of an Online Universal Prevention for Adolescent Alcohol Use: a Causal Mediation Analysis.

Several universal school-based prevention programs, notably the Australian Climate Schools program, have proven efficacious at reducing and maintaining a lower level of harmful alcohol consumption relative to a control condition. Yet, there are limited studies investigating the potential mechanisms that account for the reduction in harmful alcohol consumption. The current study utilised modern causal mediation analysis to investigate whether several harm minimisation and social influence mediators could jointly account for the intervention effect observed in a large school-based sample. Four mediators representing knowledge, attitudes, normative perceptions, and self-efficacy to resist peer pressure were entered into a multiple casual mediation model using the potential outcomes framework. The results did not provide evidence for a joint multiple mediation model consisting of the hypothesised harm minimisation and social influence mediators. Additional research is required to further investigate the potential mechanisms underlying universal school-based prevention programs including social connectedness and cultural/environmental factors. [ABSTRACT FROM AUTHOR]