Health technology assessment (HTA) agencies wish to ensure the impact of their HTAs. HTA impact assessment measures the influence of a HTA on decision-making and downstream to patient outcomes. Despite their potential to provide insights, the use of impact assessment frameworks by HTA agencies is limited. Understanding the underlying mechanisms of adopting HTA impact assessment frameworks is therefore important. Using a social cognitions lens, this study aims to provide insights into the enabling and hindering factors associated with the assessment of HTA impact by INAHTA members.

Using an interpretive description design, this cross-sectional study used semi-structured interviews of INAHTA members to gain insight into attitudes, social support, self-efficacy, barriers, and intentions towards HTA impact assessment. Transcriptions were analyzed using a social cognitions lens by two researchers using a constant comparative method to identify themes.

Twenty-six of forty-seven INAHTA members participated. Preliminary results showed that interviewees most often perceived support for assessing impact from their ministry of health or from agency staff. Most interviewees noted challenges to measuring impact at the right time and a lack of human resources, methods, and tools as internal barriers. A lack of transparency and a limited impact assessment culture were perceived as the main external barriers. Interviewees reported feeling fairly confident in overcoming internal barriers, but were less confident in overcoming external barriers. Providing feedback for improvement to HTA processes and making achievements visible were the most frequently reported advantages of assessing impact, whereas its time consuming nature was the biggest disadvantage.

This is the first study to use a social cognitions model to understand HTA impact assessment. Although the results of this convenience sample need to be interpreted with caution, they contribute knowledge on factors that facilitate and hinder agencies in the assessment of impact and illuminate opportunities for developing effective strategies to support HTA agencies in this area.