Patient Preferences in the Management of Wet Age-Related Macular Degeneration: A Conjoint Analysis

Abstract

Introduction: To identify patient preference drivers related to the management of wet age-related macular degeneration (wet AMD).

Methods: In this cross-sectional study, a self-explicated 'conjoint analysis' survey was administered online to eligible patients with wet AMD (receiving anti-vascular endothelial growth factor [VEGF] treatment for at least 12 months) from the USA, Canada, UK, France, Spain, Germany, Italy, Japan, Taiwan, and Australia. The survey consisted of six domains with 21 attributes, which were selected on the basis of a literature review, social media listening, and tele-interviews/discussions with patients, clinical experts, and patient groups. Utility and relative importance scores were generated for each attribute and utility difference significance testing was performed using 'unequal variances t tests'. The Patient Activation Measure (PAM-13) questionnaire was administered to assess patients' knowledge, skill, and confidence in self-management.

Results: A total of 466 patients (mean age, 68 years; women, 54%; binocular wet AMD, 28%) with an average anti-VEGF treatment duration of 3.9 years completed the survey. The most important preference domains were 'treatment effects on vision' (non-significant) and 'vision-related symptom burdens' (p < 0.001), followed by 'treatment risk' (p < 0.05), 'impact on daily activities' (p < 0.05), 'burden of clinic/hospital visits' (p < 0.001), and 'impact on psychological well-being'. The five most important attributes in order of importance were clarity of vision, treatment effect on symptoms, quality of vision, time to treatment effect, and time to re-administration. The two most important attributes globally were also in the top three attributes across countries. The majority of participants in the study were level 3 or level 4 of the PAM-13 questionnaire.

Conclusions: This study identified the most important disease and treatment attributes to patients using patient-centred methods. The data showed the degree of harmonization of preferences across geographies and that participants actively adopt behaviours required for improved treatment outcomes. The identified preference drivers may inform future clinical development.

Keywords: Conjoint survey; Neovascular age-related macular degeneration; Patient activation measure (PAM); Patient preference; Preference drivers; Treatment adherence.

Fig. 1

Domains and attributes

Fig. 2

Global and country-specific treatment effect. ns non-significant

Fig. 3

Global and country-specific vision-related symptom burden. ns non-significant

Fig. 4

Global and country-specific burden of clinic or hospital visits. ns non-significant

Fig. 5

Global and country-specific risk of treatment-related safety and tolerability issues or events. ns non-significant

Fig. 6

Global and country-specific impact on daily activities. ns non-significant

Fig. 7

Global and country-specific impact on psychological well-being. ns non-significant