229 Using theory to design a physical activity behaviour change intervention: An evidence synthesis of barriers, enablers and pathways of change in CF

Background: Behaviour change interventions are complex. To develop a successful evidence based intervention, a systematic approach must be taken in considering evidence within the target population. Aims: To inform the development of a physical activity behaviour change intervention for children with CF. Methods: The Behaviour Change Wheel (Michie et al 2011) was used as a framework to systematically review existing evidence. Stage 1: identify barriers, enablers and pathways of change from existing evidence. Stage 2: map these to behaviour system components and intervention functions which could be used to overcome barriers and enhance enablers. A literature search (conducted July 2012) of Medline, Embase and AMED retrieved studies with a wide range of methodologies. The search was not limited to randomised controlled trials. Results: A wide range of barriers and enablers were found which mapped to behaviour system components (physical and psychological capability, reflective and automatic motivation, physical and social opportunity). Intervention functions which could be used to modify each behaviour system component were then identified: training, enablement, education, persuasion, incentivisation, coercion, environmental restructuring, modelling, and restriction. All intervention functions were considered within the scope of practice for clinicians. Conclusion: There are reported barriers and enablers which map to all behaviour system components affecting physical activity behaviour in CF. This supports the need to develop a multi-component physical activity intervention with a range of intervention functions which can be tailored to individual patient needs.