Lipid-lowering agent preferences among patients with hypercholesterolemia: a focus group study

Non-adherence to lipid-lowering agents poses significant risks to patients and diminishes treatment effectiveness. Current understanding of patients' preferences regarding the characteristics of these agents is limited. This study aims to qualitatively identify the barriers to lipid-lowering medication adherence and the factors considered by patients with hypercholesterolemia when choosing lipid-lowering agents, and to inform the design of a medication preference study.

Face-to-face focus group interviews were conducted with Cantonese-speaking patients diagnosed with hypercholesterolemia in Hong Kong. Patients were recruited by cardiologists at a university-affiliated hospital using convenience sampling. The interviews consisted of three parts: gathering patients' perceptions of disease and medication, identifying important factors in selecting lipid-lowering agents, and completing the medication preference tasks designed using the Discrete Choice Experiment (DCE) method. Thematic analysis was used to categorise the codes derived from the transcripts into higher-order themes.

Twenty patients completed the focus group interviews on the university campus between January and March 2023. Four main themes emerged: medication management issues, patients' medication preferences, structure, and comprehension of preference tasks. Barriers to medication adherence included lack of knowledge, a high pill burden, poor communication with healthcare providers, minimal treatment decision involvement, limited access to medication information, side effects, and forgetfulness. Factors influencing medication choice were treatment regimen (i.e. the route and frequency of administration), effectiveness, side effects, doctors' opinions, drug interactions, and out-of-pocket costs. Despite suggestions for modifying attributes and levels, the medication preference tasks effectively reflected patients' trade-offs.

The identified barriers to medication adherence and the factors influencing medication choice highlight the importance of considering patients' perspectives. These insights could assist decision-makers in selecting medications that align with patient preferences, thereby promoting medication adherence. A large-scale DCE preference study will be conducted in Hong Kong to quantify the relative importance of the attributes of lipid-lowering agents.