Determining what represents value in the treatment of prurigo nodularis and its key unmet needs in Spain through Multi-Criteria Decision Analysis

Abstract

Background: Prurigo nodularis (PN) is a chronic, debilitating dermatologic disease characterised by the presence of highly pruritic nodular lesions. PN highly impacts on patients' quality of life as there are no specific treatments available in Spain. Objectives: Determine the main value drivers in the treatment of PN in Spain and its main unmet needs using Multi‐Criteria Decision Analysis (MCDA). Methods: Literature review to synthesise relevant evidence in an evidence matrix based on the MCDA EVIDEM framework adapted to Spain. A multidisciplinary panel composed of dermatologists, hospital pharmacists and a patient weighted (5‐point scale; 0 minimum importance, 5 maximum importance) and scored each criterion included in the framework (from −5 to 5 or 0 to 5 depending on the criterion). Results were discussed in a reflective group session. Results: PN was considered a severe (3.3 ± 0.7) and infrequent (2.0 ± 0.7) disease, with high unmet needs (4.2 ± 0.7) mainly due to the lack of available treatments with specific indication for PN. Current off‐label treatments were perceived to have limited efficacy/effectiveness (1.8 ± 1.1), an unfavourable long‐term safety profile (2.1 ± 0.9) and low therapeutic impact (1.7 ± 1.1). The measure of patient‐reported outcomes (2.7 ± 0.9) was perceived as important, but available tools are not specific. Although the cost of available treatments was not considered high (2.4 ± 1.5), experts agreed that PN is associated with moderately high other medical costs (3.6 ± 1.1) and indirect costs (3.1 ± 0.9). Experts considered that current guidelines and consensus (2.6 ± 0.7) are not clear on severity criteria and treatment algorithm. The quality of evidence (1.4 ± 0.5) of currently used off‐label treatments was perceived as low due to a lack of published clinical trials.