We conducted a Cochrane systematic review of 20 randomised controlled trials that examined the effectiveness of universal multi-component programs for the prevention of alcohol misuse in young people. Multi-component prevention programs are defined as those prevention efforts that deliver interventions in multiple settings, for example in both school and family settings, typically combining school curricula with a parenting intervention.
A majority of the studies included in this review reported positive effects of multi-component programs for the prevention of alcohol misuse in young people, with effects persisting into the medium- and longer-term. But a notable proportion of trials reported no statistically significant effects. In seven studies we were able to assess the impact of single versus multiple components, and only 1 out of the 7 studies clearly showed a benefit of components delivered in more than one setting.
In conclusion, there is some evidence that multi-component interventions for alcohol misuse prevention in young people can be effective. However, there is little evidence that interventions with multiple components are more effective than interventions with single components.