Abstract
Omalizumab is a humanized monoclonal antibody that targets circulating immunoglobulin E molecules to treat severe uncontrolled asthma. The aim of this study was to determine the cost effectiveness of omalizumab compared with standard treatment for the control of severe persistent asthma according to data from patients treated in a specialized asthma unit. This was an observational, retrospective, single-center study in the setting of the Pulmonology and Respiratory Allergy Service, Thorax Institute, Hospital Clínic de Barcelona, Barcelona, Spain. Data were collected by review of medical records of 86 uncontrolled severe persistent asthma patients treated with omalizumab from January 2005 to April 2014. Effectiveness was assessed by the reduction in asthma exacerbations and 3-point increases in the Asthma Control Test (ACT) score. The economic evaluation was performed from the societal perspective, including direct health costs (resource use and drug treatments) and indirect costs (disease impact on labor productivity) in 2016 Euros. The time horizon was 12months before and after the initiation of treatment with omalizumab. Results were expressed using the incremental cost-effectiveness ratio (ICER). Taking into account only direct costs, the ICERs were €1487.46 (95% confidence interval [CI] 1241.21-1778.34) per exacerbation avoided and €5425.13 (95% CI 4539.30-6551.03) per 3-point increase in the ACT. When indirect costs were included, the ICERs were €1130.93 (95% CI 909.08-1392.86) per exacerbation avoided, and €4124.79 (95% CI 3281.69-5186.73) per 3-point increase in the ACT. The results of this study confirm the effectiveness of the addition of omalizumab to standard therapy in patients with uncontrolled severe persistent asthma.
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