Impact of a team-based versus individual clinician-focused training approach on primary healthcare professionals intention to have serious illness conversations with patients: a theory informed process evaluation of a cluster randomized trial.

BackgroundCluster Randomized Trials (cRTs) conducted in real-world settings face complex challenges due to diverse practices and populations. Process evaluations alongside cRTs can help explain their results by exploring possible causal mechanisms as the trial proceeds. ObjectiveTo conduct a process evaluation alongside a cRT that compared the impact of team-based vs. individual clinician-focused SICP training on primary healthcare professionals (PHCPs) intention to have serious illness conversations with patients. MethodsThe cRT involved 45 primary care practices randomized into a team-based (intervention) or individual clinician-focused training program (comparator) and measured primary outcomes at the patient level: days at home and goal of care. Our theory-informed mixed-methods process evaluation alongside the cRT measured intention to have serious illness conversations with patients among the trained PHCPs using the CPD-Reaction tool. Barriers and facilitators to implementing serious illness conversations were identified through open-ended questions and analyzed using the Theoretical Domains Framework. We used the COM-B framework to perform triangulation of data. We reported results using the CONSORT and GRAMMS reporting guidelines. ResultsOf 535 PHCPs from 45 practices, 373 (69.7%) fully completed CPD-Reaction (30.8% between 25-34 years old; 78.0% women; 54.2% had a doctoral degree; 50.1% were primary care physicians). Mean intention scores for the team-based (n=223) and individual clinician-focused arms (n=150) were 5.97 (Standard Error: 0.11) and 6.42 (Standard Error: 0.13), respectively. Mean difference between arms was 0.0 (95% CI -0.30;0.29; p=0.99) after adjusting for age, education and profession. The team-based arm reported barriers with communication, workflow, and more discomfort in having serious illness conversations with patients. ConclusionsTeam-based training did not outperform individual clinician-focused in influencing PHCPs intention to have serious illness conversations. Future team-based interventions could foster behaviour adoption by focusing on interprofessional communication, better organized workflows, and better support and training for non-clinician team members. RegistrationClinicalTrials.gov (ID: NCT03577002).