Abstract
Objective:There is limited information regarding the cost-effectiveness of sevelamer for the treatment of hyperphosphatemia in chronic kidney disease (CKD) patients on dialysis in the UK. Using a UK National Health Service (NHS) perspective and final results of the Dialysis Clinical Outcomes Revisited (DCOR) study, an evaluation was performed to determine the cost-effectiveness of sevelamer compared to calcium-based phosphate binders for the first-line treatment of hyperphosphatemia in CKD patients on dialysis.Methods:A Markov model was developed to estimate life years, quality-adjusted life years (QALYs), costs, incremental cost per life year (LY) gained, and QALY gained. Treatment-specific overall survival up to 44 months, hospitalizations, and resource utilization were derived from the DCOR study. Survival was extrapolated to a lifetime horizon using Weibull regression analysis. Unit costs and utility estimates specific to the UK were obtained from the published literature. Sub-group analyses were conducted based on data reported from the DCOR study for increasing age cut-points. Outcomes and costs were modeled for a lifetime horizon.Results:In the base case analysis, the use of sevelamer resulted in a gain of ∼0.73 LYs and 0.44 QALYs per patient (discounted at 3.5% per year). Total per-patient costs were higher for sevelamer, resulting in an incremental cost of £22,157 per QALY gained and £13,427 per LY gained (in £2009). Increasingly favorable cost per QALY ratios were observed with increasing age cut-points, ranging from £15,864 for patients ≥45 to £13,296 for patients ≥65 years of age. Results were most sensitive to assumptions regarding overall survival and the inclusion of dialysis costs. Key limitations of the analysis included the use of non-UK trial data for survival and hospitalizations, and the exclusion of quality-of-life impacts associated with hospitalization.Conclusions:In CKD patients receiving dialysis, treatment of hyperphosphatemia with sevelamer offers good value for money compared with calcium-based binders.
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