Cost Effectiveness of Imiquimod 5% Cream Compared with Methyl Aminolevulinate-Based Photodynamic Therapy in the Treatment of Non-Hyperkeratotic, Non-Hypertrophic Actinic (Solar) Keratoses A Decision Tree Model

Edward Wilson ()

PharmacoEconomics, 2010, vol. 28, issue 11, 1055-1064

Abstract: Background: Actinic keratosis (AK) is caused by chronic exposure to UV radiation (sunlight). First-line treatments are cryosurgery, topical 5-fluorouracil (5-FU) and topical diclofenac. Where these are contraindicated or less appropriate, alternatives are imiquimod and photodynamic therapy (PDT). Objective: To compare the cost effectiveness of imiquimod and methyl aminolevulinate-based PDT (MAL-PDT) from the perspective of the UK NHS. Methods: A decision tree model was populated with data from a literature review and used to estimate costs and QALYs gained and incremental cost effectiveness over 1 year. The model simulated patients who were in secondary care, who had four to nine AK lesions, and for whom cryosurgery, 5-FU and diclofenac were contraindicated or considered less appropriate. Results: Over 1 year, imiquimod cost £174 less than MAL-PDT (year 2006 values) but resulted in 0.005 fewer QALYs gained. The incremental cost-effectiveness ratio (ICER) of MAL-PDT over imiquimod was d34 576. In the probabilistic sensitivity analysis, there was a 75% probability that imiquimod was cost effective compared with MAL-PDT at a threshold of £20 000 per QALY gained, falling to 73% at £30 000. Conclusions: Imiquimod may be the more cost-effective treatment at conventional cost-effectiveness thresholds. A direct head-to-head study of MALPDT versus imiquimod is required to reduce uncertainty. Copyright Adis Data Information BV 2010

Date: 2010
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DOI: 10.2165/11538670-000000000-00000

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