Towards multi-faceted outcomes of participation-based interventions: mapping the PREP's effects for children and youth with disabilities

Purpose: Systematically organizing participation effects may guide participation-based research designs in rehabilitation. This perspective paper uses existing evidence on Pathways and Resources for Engagement and Participation (PREP) to showcase the multitude of effects from a single intervention and synthesize the magnitude of these effects.Methods: An outcome matrix of participation effects comprising three dimensions (intermediate, instrumental, ultimate) and two levels (transient, enduring) was used to systematically map PREP's effects. Forest plot demonstrated clinically important changes in the Canadian Occupational Performance Measure (COPM) across studies. Effect sizes were calculated.Results: The majority of outcomes from 11 studies were mapped to ultimate-transient effects (e.g., changes in participation of self-chosen activities), followed by instrumental-transient effects (e.g., changes in motor body functions). Fewer outcomes were mapped to ultimate-enduring effects (e.g., changes of participation for a longer period or across settings) or intermediate-enduring effects (e.g., therapist-applied knowledge), demonstrating the gaps for investigating enduring effects. COPM changes in most studies (89%) showed clinical significance with small to large effects.Conclusions: Systematic mapping from PREP example guides categorizing multidimensional outcomes. Future participation-based studies can employ individual-based mixed-methods designs to delve into the long-lasting enduring outcomes of youth capacity-building and the transformative process of pursuing meaningful participation goals.