Sharing believable stories: A qualitative study exploring the relevance of case studies for influencing the creation of healthy environments.

Case study examples can inform policy recommendations and action to create healthy environments. This qualitative study, using semi-structured interviews with nine cross-sectoral stakeholders in England, explored the role of context in case study examples. We found that case studies can not only be a 'practical example' but also used as a 'believable story' with the power to influence decision-making. Case studies may be deemed believable if similar and locally relevant, but judgements can be inherently political and politicised. Metrics used to measure case study outcomes can differ in believability. Storytellers who understand different audiences can be used to build support.