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. •Case study examples can be used to tell believable stories to influence decision-making.•Believable stories are ways of organising and framing multiple pieces of evidence.•Physical, socio-economic and political issues will affect believability.•The type of data used to demonstrate impact should vary depending on the audience.•Believable stories may increase acceptability of environmental change.