Health Economic Assessment of Optimal Biological Treatment for Moderate-to-Severe Psoriasis

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Abstract

Background: There is limited guidance on which biologic therapies should be prioritised for the treatment of moderate-to-severe psoriasis, amongst the many available options. New mode-of-action biologics, as well as recently available biosimilars for existing biologics, continue to be developed making the choice of treatment sequence increasingly complex. Objectives: The aim of this analysis was to develop a cost-effectiveness model to determine the optimal placement of biologic therapies on the treatment pathway for psoriasis in the UK. Methods: A cohort-based Markov model was developed in Microsoft Excel, from the perspective of the National Health Service and Personal and Social Services in the UK. The model followed a hypothetical cohort of patients over a lifetime. The health states in the model were defined by Psoriasis Area and Severity Index response. In the model, patients could receive a total of four separate treatments, including three active interventions and best supportive care. Results: A fully incremental analysis was undertaken on a subset of commonly used treatment sequences. The results of the list price analyses determined the most cost-effective sequence to be adalimumab biosimilar followed by ustekinumab, secukinumab, then best supportive care. This sequence is associated with total costs of £78,731 and total quality-adjusted life-years of 14.74 over a patient’s lifetime. Conclusions: This research suggests that the optimal first-line treatment in the UK is adalimumab biosimilar. The optimal second-line and third-line treatments depend on the magnitude of confidential discounts applied to the biologic treatments.

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Barker, J., Baker, H., Nadeem, A., Gu, D. H., & Girolomoni, G. (2021). Health Economic Assessment of Optimal Biological Treatment for Moderate-to-Severe Psoriasis. Clinical Drug Investigation, 41(11), 1011–1020. https://doi.org/10.1007/s40261-021-01089-4

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