Development and description of a logic model for a guided, low-intensity cognitive behavioural therapy intervention for parents of persons treated for cancer during childhood: the EJDeR intervention.

BACKGROUND

There is a lack of psychological interventions for parents of persons treated for cancer during childhood who report a need for support. We therefore developed a psychological intervention, including a programme theory and logic model as recommended by the UK Medical Research Council. The logic model offers structured ways to articulate how interventions are intended to work and interact within their context. The processes by which programme theories and logic models are developed and refined are rarely described in detail.

OBJECTIVE

This paper describes the development of the programme theory and logic model of a workbook and audio-administered, telephone-guided, low-intensity cognitive behavioural therapy intervention (EJDeR) for parents of persons treated for cancer during childhood.

METHODS

We iteratively developed the programme theory and logic model for EJDeR in line with published guidance, drawing on prior research findings and existing theory. A multistage process involving multidisciplinary researchers and a Parent Advisory Board was used to draft and refine the logic model.

RESULTS

The final version of the logic model outlines intervention resources, intervention delivery, outputs, mechanisms of impact, outcomes and contextual factors.

CONCLUSIONS

Using the EJDeR intervention as an example, we have illustrated an iterative, theory and research-informed approach to developing a programme theory and logic model in collaboration with key interest holders, including public contributors. Articulating and refining the programme theory enhanced our understanding of how the intervention is intended to work and provides a transferable example for developing logic models in complex healthcare intervention research.

TRIAL REGISTRATION NUMBER: The ENGAGE feasibility trial: ISRCTN57233429.