Ten Recommendations for Modelling Cost Effectiveness of Screening: Perspectives of an International Stakeholder Group.

Modelling the cost effectiveness of screening interventions presents unique challenges. These relate to a lack of knowledge about underlying health states and disease progression in the absence of screening, added costs arising from incidental findings, screening recall and follow-up diagnostics, imperfect uptake, potential harms to otherwise healthy people, and impacts on resource capacity and equity. No specific but generalisable advice currently exists to help guide health economic modellers working in this area. There is a need for tailored recommendations beyond the widely used, health economic modelling frameworks. We aimed to develop a set of recommendations for modelling the cost effectiveness of screening programmes. In our iterative process, we first drafted a conceptual document outlining key issues requiring recommendations. This framework was then expanded based on additional themes identified through a survey of screening modelling experts. Next, the draft recommendations were shared with a broader international expert group, which included modellers, health economists and policy specialists. Finally, the core concepts were refined and agreed upon during a virtual stakeholder meeting. A set of ten recommendations and a checklist are presented. The document provides guidance on critical methodological requirements for modelling screening interventions. These guidelines are intended to help health economic modellers and screening policy makers working to evaluate screening interventions across a wide range of diseases and jurisdictions with clarity, rigour and consistency.