Domain-Specific Intervention Patterns In the Parental Substance Use Disorder Intervention Literature: A Meta-Analysis

Background and Purpose: Parents with substance use disorders (SUD) often experience difficulties that extend beyond substance use itself, including parenting-related problems, psychological distress, and elevated maltreatment risk. These interventions are expected to affect multiple outcome domains. Because parental SUD interventions vary in the extent to which they emphasize SUD treatment, parenting content, or both, their effects may not be uniform across outcomes. This meta-analysis examined whether different intervention patterns were associated with different outcome domains in the parental SUD intervention literature.

Methods: This meta-analysis synthesized effect sizes for each intervention and comparison condition from randomized and quasi-experimental studies of parental SUD interventions. Searches of PubMed, PsycINFO, CINAHL, Web of Science, and ERIC identified studies published between January 1, 1990, and October 30, 2025. Eligible studies reported outcomes in at least one of six predefined domains: child abuse potential, parental mental health, parenting behavior, parenting stress, parent-child interaction, and substance use. Nine studies met inclusion criteria from 1,045 records. Standardized mean change from baseline- to post-intervention was calculated for each intervention and comparison condition across domains. Primary analyses compared parenting-focused, SUD-focused, and integrated SUD+parenting conditions; secondary analyses reclassified arms by parenting-component inclusion and delivery pattern; robustness checks examined exclusion-based sensitivities and alternative assumed pre-post correlations (r = .30, .50, .70).

Results: Meta-analyses of 9 studies identified distinct domain-specific intervention patterns. For child abuse potential and parental mental health, parenting-focused and integrated conditions showed larger reductions than SUD-focused conditions. The largest reduction in child abuse potential, based on standardized measures of maltreatment-related risk, was observed in parenting-focused conditions (k=2, g=0.66 [0.36, 0.96], p<.001), whereas the largest reduction in parental mental health was observed in integrated conditions (k=2, g=0.57 [0.32, 0.82], p<.001). Substance use followed a different pattern, with the largest estimated reduction in integrated conditions (k=2, g=1.09 [-0.40, 2.57], p=.152), although this estimate was not statistically significant and heterogeneity was substantial (I²=86.3%). Parenting behavior showed a similar directional pattern but was based on a small number of subgroups, whereas parenting stress and parent-child interaction showed smaller or less differentiated patterns across conditions. In secondary analyses, parenting-component conditions and direct therapeutic conditions generally showed larger estimates than comparison conditions without those features. These patterns remained similar in sensitivity analyses.

Conclusion and Implications: Parental SUD interventions should not be treated as a single, interchangeable category. In this review, parenting-related outcomes showed the clearest reductions in parenting-focused and integrated conditions, whereas substance use showed a broader pattern across active care conditions, with the largest estimated reduction observed in integrated care. This pattern suggests that substance use treatment alone should not be assumed to shift parenting-related risk, and that intervention models should be evaluated in relation to the specific domains they are intended to change. Although some subgroup estimates were based on limited evidence, this constraint reflects a broader gap in the parental SUD intervention literature: many outcomes that matter for parents and families have not been evaluated consistently across intervention types. Future studies should test parenting-related and family outcomes more systematically alongside substance use outcomes.