An in-depth understanding of stakeholders' experiences about their participation in the co-production of 'Maze Out': a serious game for the treatment of eating disorders.

Background: Co-production is increasingly used in mental health research and clinical settings. Maze Out is a digital game co-produced by clinicians, patients with eating disorders (EDs), an art director with lived experience in EDs, and a game-developing company. Maze Out is based on everyday challenges when suffering from EDs and is currently being evaluated as a supplement tool in EDs treatment. Several studies on co-producing mental health interventions focus on design and effectiveness, but the experiences of those involved in the co-production process remain unexplored. An in-depth exploration of stakeholders' experiences offers valuable insights into the impact of co-production on different groups and generates crucial knowledge for successful implementation.

Objectives: This study evaluated and explored the co-production process and the meaning that EDs patients, clinicians, and game designers attributed to their participation in the co-production of Maze Out. The objectives were to determine (1) how stakeholders experienced their collaboration in the co-production of Maze Out.; and (2) to what extent the stakeholders involved in developing Maze Out followed Cahn's principles of equality, diversity, accessibility, and reciprocity.

Methods: Five stakeholders (two patients, two clinicians, and a game designer) who participated in the co-production completed semi-structured interviews. Two patients and one clinician's diaries supplemented the interviews. Reflexive thematic analysis was used to interpret the data.

Results: The results of this study highlight the importance of building a common language between clinicians, patients, and other professionals involved in developing new forms of treatment and interventions. A recommendation for researchers and clinicians to implement co-production in the future is that Cahn's principles: equality, reciprocity, accessibility, and diversity, serve as a strong foundation for successful co-production. In this study, three and partially one of the four Cahn's principles about co-production were identified: equality, reciprocity, and accessibility. When applied in an ED context, these principles provided stakeholders with valuable insights, enriching practice-based knowledge, using the knowledge applicable to clinical practice, and demonstrating their crucial role in fostering effective co-production processes.