Effectiveness of Family-Involved Interventions in Reducing Co-Occurring Alcohol Use and Mental Health Problems in Young People Aged 12-17: A Systematic Review and Meta-Analysis

There is a high prevalence rate of co-occurring alcohol use and mental health problems in young people. This is associated with adverse outcomes and poses a substantial public health concern. We identified and synthesized evidence on the effectiveness of family-involved interventions in reducing alcohol use and mental health problems in young people aged 12-17. Seven databases were searched from inception to January 2023. Data from 19 articles reporting on 14 trials were pooled through random-effects meta-analysis for each outcome using Review Manager 5.3. Pooled estimates resulted in non-significant findings for alcohol use (SMD -0.60; 95% CI -1.63 to 0.42; p = 0.25; 6 trials; 537 participants), internalizing symptoms (SMD -0.13; 95% CI -0.37 to 0.10; p = 0.27), externalizing symptoms (SMD -0.26; 95% CI -0.66 to 0.15; p = 0.22) and substance use (SMD -0.33; 95% CI -0.72 to 0.06; p = 0.10). In contrast, significant intervention effects were identified for the mechanism of change, family conflict (SMD -0.30; 95% CI -0.51 to -0.09; p = 0.005). Consequently, addressing family functioning may not be sufficient in reducing co-occurring alcohol use and mental health problems. Non-significant intervention effects could be due to a lack of content addressing the relationship between alcohol use and mental health problems. Future intervention development could explore whether to incorporate such content and how best to involve the family.