Increasingly, health technology assessment (HTA) organizations have instituted mechanisms for involving patients in assessment and review processes. The reasons are obvious—to understand the “patient experience” with a disease and to ensure that patient perspectives are considered during deliberations about the value of new treatments. More recently there have been efforts to engage the public in HTAs and HTA-informed decision-making processes. However, the goals of these efforts have not been well articulated. This may be attributable to the lack of a shared definition of “the public”. The objective of this study was to develop a common understanding of the term “the public” within the context of HTA.

The following were conducted: a survey of HTA organizations; a systematic review; consultation with Health Technology Assessment international's Special Interest Group on Patient and Citizen Involvement; and a workshop comprising representatives from patient organizations, industry, and HTA bodies in Canada.

In many HTA processes, the terms “public” and “patients” are synonymous. Definitions found in scholarly articles vary and depend on the rationale for involving the public in a particular issue. Through consultations it became clear that, in the context of HTA, the definition depends on understanding what is missing from current deliberations around the value of new health technologies. There was consensus among workshop participants that: (i) “patients” and “the public” are not the same; (ii) the role of the public may be to ensure societal values are reflected in HTAs and HTA-informed decision-making processes (e.g. serving an audit function); and (iii) a legitimate definition of “the public” could be: “A non-aligned community member with no commercial or professional interest in the HTA process who is not a patient or member of a stakeholder group”.

Consensus on the use of the terms “patient” and “public” will support rigorous, evidence-based public and patient engagement in HTA. The proposed definition indicates a way forward in this debate.