OP88 Drawing Lines In The Sand: How Do We Define The Scope Of Analysis In HTA And Economic Evaluation?

Introduction We explore how the scope of analysis is defined in health technology assessment (HTA) and economic evaluation and consider the potential implications of these decisions. Methods The scope of analysis, including decisions about which methods and domains of HTA to include in the assessment, which costs, and health outcomes are most meaningful, and which comparators are the most relevant are typically informed by the needs of the decision-maker. We undertook two systematic scoping reviews to assess: (i) to what extent systems thinking is considered in literature-based technology assessments; and (ii) how the scope of the analysis is defined in economic evaluation using Clostridioides difficile infection as an exemplar. We synthesized the findings from these reviews and offer three key observations for future research and exploration in the field of HTA. Results Our scoping reviews found that the scope of analysis in economic evaluations typically focus on single interventions, often ignoring upstream and downstream interventions. Similarly, published technology assessments have narrowly defined and inconsistent scopes of analysis, with limited consideration of indirect health and non-health impacts. Three key observations for the field of HTA include: (i) economic evaluations focus on the value of single heath interventions. A focus on a single health intervention may simplify the analysis; however, will this siloed decision-making lead to optimal health resource allocation? (ii) published assessments have inconsistently defined scopes of analysis. A decision problem that focuses on the needs of the decision-maker is practical; however, will inconsistencies in perspectives across assessments create unfair conceptualizations of value? (iii) HTA is technology-focused, not patient-focused. A technology-focused HTA system aligns with the technology diffusion process; however, does this move us away from the patient-centered mandate of HTA? Conclusions The dynamic nature of HTA leads to many conceptualizations of value. Considering the potential implications of narrowly defined, inconsistent, and technology-focused scopes of analyses may have consequences on achieving a patient-centered high-quality health system.