Objectives: The objective of this research was to estimate lifetime cost-effectiveness of treating patients with cinacalcet early (when parathyroid hormone [PTH] levels are in the range of 300-500 pg/ml) versus delaying treatment with cinacalcet (cinacalcet initiated when PTH levels are > 800 pg/ml) in patients with secondary hyperparathyroidism (SHPT) in the US setting.
Methods: A Markov model was developed to simulate the effects of early versus delayed use of cinacalcet (plus standard of care). Four different PTH ranges (< or = 300 pg/ml; 301-500 pg/ml; 501-800 pg/ml; > 800 pg/ml) were used to represent four different health states within the Markov model. Associated with each Markov state (PTH range) were varying risks of major SHPT complications, including cardiovascular disease (CVD), fracture (Fx), and parathyroidectomy (PTx). Baseline cohort characteristics and risks of CVD, Fx, and PTx by PTH category were derived from a large US renal database and published sources. Costs were estimated from the US Renal Data System database and reported in 2006 US Dollars ($). Clinical and economic outcomes were discounted at 3.0% per annum.
Results: Early treatment was projected to improve quality-adjusted life years (QALYs) by 0.337 years compared to delaying treatment. The incremental cost-effectiveness ratio was $17,275 per QALY gained.
Conclusions: Early treatment with cinacalcet was associated with improvements in QALYs and would represent good value for money compared to delaying treatment with cinacalcet.
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