Clinician adoption of Parent-Child Interaction Therapy: A systematic review of implementation interventions.

Background: Parent-Child Interaction Therapy (PCIT) is a parent training intervention for childhood conduct problems, distinctive in its use of live clinician coaching of the parent-child dyad via a one-way mirror and discrete earpiece. However, despite a compelling evidence base, uptake of evidence-based parent training programmes such as PCIT by clinicians in routine care settings remains poor. This systematic review aimed to identify and synthesise implementation interventions that have sought to increase clinician adoption of PCIT in usual care settings.

Methods: We searched MEDLINE (Ovid), Embase (Ovid), PsycInfo (Ovid), CINAHL (EBSCO), Science Citation Index and Social Sciences Citation Index, and Web of Science Core Collection from inception to October 2020. Articles were included if they tested (by way of randomised controlled trials, controlled clinical trials, interrupted time series and controlled before and after trials) implementation interventions across any and all of the patient, clinician, clinic, system or policy domains. Two independent reviewers screened and selected studies, assessed risk of bias and extracted data - summarising implementation intervention components according to items from the Template for Intervention Description and Replication (TIDieR) checklist ( Hoffmann et al., 2014).

Results: Of the 769 articles identified once duplicates were removed, 13 papers relating to three studies met the inclusion criteria - all were quantitative or mixed-methods examinations of the effectiveness of different PCIT clinician training or training-related consultation methods. A narrative description of interventions was provided, as quantitative synthesis was not possible.

Conclusions: Research attention has to date been focussed on the establishment of an evidence-base for PCIT's effectiveness, with relatively little attention to the dissemination, implementation and sustainment of this treatment. Those studies that do exist have focused on training methods and training-related expert consultation. Research attention could usefully turn to both adoption and sustainment of this effective treatment in usual care settings.

Plain language summary: In this review, we aimed to summarise what is already known about how to implement PCIT in community settings after clinicians have received training in the approach. While research relating to the implementation of other parent training programmes is interesting and informative, implementation efforts are most effective when tailored to a specific programme in a specific context. As such, it was important to review published studies relating to PCIT specifically. We identified three relevant studies, one of which is yet to publish its main implementation findings. The three studies have focused on how best to train clinicians in PCIT, including how best to provide post-training support from expert trainers. We concluded that a fruitful line for future research would be to focus on the post-training period, particularly how best to support clinicians to adopt and sustain PCIT in their practice.

Systematic review registration: The study was prospectively registered with the International Prospective Register of Systematic Reviews (PROSPERO) on 01/10/2020 (CRD42020207118).