Background: Ceftazidime-avibactam (C/A), has shown reduction in mortality rates and risk of nephrotoxicity, compared to colistin, conventional therapy.
Aim: To estimate the cost-effectiveness of C/A versus colistin + meropenem in the treatment of infections due to carbapenem-resistant Enterobacteriaceae (CRE) in Chile.
Methods: An economic decision tree type model was adapted. The perspective of the public payer was used with a time horizon of 30 days and extrapolation to life expectancy. The clinical information was derived from an observational study. Medication and care costs correspond to local reports. The results are expressed as incremental cost-effectiveness ratio (ICER) per life year gained (LYG) and per quality adjusted life year (QALY) in Chilean pesos and US dollars (US$ 1.00 = $792.2218).
Results: 8.65 and 6.48 LYGs and 6.44 and 4.27 QALYs were obtained, for C/A and colistin + meropenem, respectively. The estimated ICER for C/A was $940,488 (US$1,187.2) per AVG and $938,715 (US$1,184.9) per QALY.
Discussion: Given the lack of publications or evidence, the model is based on an observational study. C/A would reduce the death rate and increase LYGs and QALYs, resulting in a cost-effective alternative vs. colistin + meropenem for CRE.
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