Determinants that influence knowledge brokers' and opinion leaders' role to close knowledge practice gaps in rehabilitation: A realist review

Rationale: Despite the available evidence to support optimal practices in rehabilitation, significant knowledge practice gaps persist. Opinion leaders (OLs) and knowledge brokers (KBs) can enhance the success of knowledge translation (KT) interventions and improve uptake of best practices among clinicians. However, the literature on the mechanisms underpinning OLs'/KBs' activities, and guidance on the type of support needed for successful implementation of these roles in rehabilitation contexts is scarce. This research aimed to highlight the differences and similarities between OLs and KBs with respect to context, mechanism, and outcomes as well as describe the common patterns of OLs and KBs by creating a context-mechanism-outcomes configuration.

Methods: We conducted a realist review to synthesize the available evidence on OLs/KBs as active KT strategies. A search was conducted across five databases up to November 2019. Two independent reviewers extracted the data using a structured form. A context-mechanism-outcome configuration was used to conceptualize a cumulative portrait of the features of OLs/KBs roles.

Results: The search identified 3282 titles after removing duplicates. Seventeen studies (reported in 20 articles) were included in the review. Findings suggest a number of desirable features of OLs/KBs roles that may maximize the achievement of targeted outcomes namely being (a) embedded within their organization as "insiders"; (b) adequately skilled to perform their role; (c) identified as able to fulfil the role; (d) appropriately trained; and (e) able to use different KT interventions.

Conclusion: Findings of this realist review converge to create a context-mechanism-outcomes configuration with suggestions to optimally utilize OLs/KBs in rehabilitation. The configurations suggest desirable features that can lead to a greater potential to achieve targeted goals. It is preferable that OLs/KBs be embedded in the organization and that they are adequately skilful and well-trained. Also, OLs/KBs should perform the required roles using KT interventions adapted to the local context.