Guideline Structure. This draft guideline for evidence-based co-creation for public health interventions is structured around the stages and principles of a recent seminal publication by Calum Leask and colleagues (Leask et al. 2019). These stages and principles were selected because they are overarching in nature, and further revisions will likely still follow a similar structure and order. Additionally, they are from a recent, well-referenced paper, that focuses on applying co-creation to public health interventions. Therefore, the use of these stages and principles was determined as an appropriate and low-risk starting point for structuring this guideline. Consequently, these preliminary sets of stages and principles used in this version of the guideline are subject to change based on further research and testing. Guideline Content. The content of this document is based on a literature review of evaluation, implementation, and a snowballing search for methods suitable for co-creation. This document represents the first version of the guideline, so it’s important to note that the content references existing resources that can help execute a co-creation process for public health interventions, but it is not a comprehensive guide. The next stage of development of this guideline will include additional systematic reviews, expert consultations, and participatory workshops. Reporting Template. This guideline includes a reporting template. This template is intended to be used as an annexe, appendix, or supportive document for reporting on your co-creation process. Please do not use the reporting template that is integrated into the guideline, as that is the old version. IMPORTANT: The newest version is accessible below as a separate Word document that you can download and edit direclty. If you have any questions regarding any of these materials, then please feel free to reach out to the lead authors: Danielle Agnello (danielle.agnello@gcu.ac.uk) and Giuliana R. Longworth (giulianaraffaellal@blanquerna.url.edu).

The authors on this document represent co-first authorship written in alphabetical order