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  • Title: Cost-effectiveness of salmeterol, fluticasone, and combination therapy for COPD.
    Author: Oba Y.
    Journal: Am J Manag Care; 2009 Apr; 15(4):226-32. PubMed ID: 19355795.
    Abstract:
    OBJECTIVE: To assess the incremental cost-effectiveness of inhaled medication use in chronic obstructive pulmonary disease (COPD). STUDY DESIGN: A Markov model was constructed to estimate the incremental quality-adjusted life-years (QALYs) gained of the alternative treatment arms used in the Towards a Revolution in COPD Health (TORCH) study (ie, salmeterol-fluticasone propionate combination [SFC], salmeterol, fluticasone, and placebo). METHODS: The cycle length for the model was set to 3 months, and the maximum time horizon was set to 3 years. The cost-effective analysis was conducted from a third-party payer's perspective in the US healthcare system. Future costs and effects were discounted at 3%. Multiple 1-way sensitivity analyses and a probabilistic sensitivity analysis using Monte Carlo simulation were performed to handle uncertainty. RESULTS: The most cost-effective strategies are placebo (as-needed short-acting bronchodilator use with no maintenance therapy) when willingness to pay (WTP) is less than $52,800/QALY gained and SFC when WTP exceeds that threshold. When no maintenance therapy is not an acceptable option, the most cost-effective strategies are treatment with salmeterol when WTP is less than $49,500/QALY gained and treatment with SFC when WTP exceeds that threshold. The base-case analysis showed that incremental cost-effectiveness ratios of salmeterol, fluticasone, and SFC relative to placebo were $56,519, $62,833, and $52,046/QALY gained, respectively. CONCLUSIONS: The most cost-effective strategy in moderate-to-severe COPD depends on how much society is willing to pay to achieve health improvements. When treatment with as-needed short-acting bronchodilator use does not provide adequate control, salmeterol or SFC would be the drug of choice depending on WTP.
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