Abstract
The objective of this paper was to assess the cost–utility of fidaxomicin versus vancomycin in the treatment of Clostridium difficile infection (CDI) in three specific CDI patient subgroups: those with cancer, treated with concomitant antibiotic therapy or with renal impairment. A Markov model with six health states was developed to assess the cost–utility of fidaxomicin versus vancomycin in the patient subgroups over a period of 1 year from initial infection. Cost and outcome data used to parameterise the model were taken from Spanish sources and published literature. The costs were from the Spanish hospital perspective, in Euros (€) and for 2013. For CDI patients with cancer, fidaxomicin was dominant versus vancomycin [gain of 0.016 quality-adjusted life-years (QALYs) and savings of €2,397 per patient]. At a cost-effectiveness threshold of €30,000 per QALY gained, the probability that fidaxomicin was cost-effective was 96 %. For CDI patients treated with concomitant antibiotic therapy, fidaxomicin was the dominant treatment versus vancomycin (gain of 0.014 QALYs and savings of €1,452 per patient), with a probability that fidaxomicin was cost-effective of 94 %. For CDI patients with renal impairment, fidaxomicin was also dominant versus vancomycin (gain of 0.013 QALYs and savings of €1,432 per patient), with a probability that fidaxomicin was cost-effective of 96 %. Over a 1-year time horizon, when fidaxomicin is compared to vancomycin in CDI patients with cancer, treated with concomitant antibiotic therapy or with renal impairment, the use of fidaxomicin would be expected to result in increased QALYs for patients and reduced overall costs.
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Acknowledgements
Financial support for this manuscript was provided by Astellas Pharma Spain. Astellas Pharma is the holder of marketing authorisation for fidaxomicin in Spain.
Conflict of interest
A. Toledo and P. Anguita were employees of Astellas Pharma Spain and M. Watt and R. Gani were employees of Astellas Pharma EMEA at the time of preparing this manuscript. C. Rubio-Terrés and D. Rubio-Rodríguez received an honorarium from Astellas Pharma Spain in connection with the development of this manuscript. The remaining authors have no conflicts of interest.
Contributions of the authors
A. Toledo, C. Rubio-Terrés and D. Rubio-Rodríguez made the adaptation of the economic model. C. Rubio-Terrés, D. Rubio-Rodríguez and A. Toledo wrote the first and subsequent versions of the manuscript. All the authors contributed to the fruitful discussion of the results and to the review of the different versions of the manuscript. C. Rubio-Terrés is the guarantor of the overall content of the paper.
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Rubio-Terrés, C., Cobo Reinoso, J., Grau Cerrato, S. et al. Economic assessment of fidaxomicin for the treatment of Clostridium difficile infection (CDI) in special populations (patients with cancer, concomitant antibiotic treatment or renal impairment) in Spain. Eur J Clin Microbiol Infect Dis 34, 2213–2223 (2015). https://doi.org/10.1007/s10096-015-2472-0
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DOI: https://doi.org/10.1007/s10096-015-2472-0