1604. Cost-Effectiveness of Ceftazidime-Avibactam for Patients with Hospital-Acquired Pneumonia Caused by Multi-Drug Resistant Enterobacteriaceae or Pseudomonas in China

Abstract

Background. To estimate the cost-effectiveness of ceftazidime-avibactam (CAZAVI) for the treatment of hospital-acquired pneumonia (HAP) including ventilator-associated pneumonia (VAP) caused by multi-drug resistant enterobacteriaceae (MDRE) or MDR pseudomonas aeruginosa (MDRPA) in China. Methods. A previously published patient-level simulation model was localized to China to estimate the cost-effectiveness of first-line CAZ-AVI compared to meropenem from a healthcare perspective. Patients flowed through the model which evaluates resistance status, response, and adverse events (AEs), which can all lead to a treatment switch. Second-line therapy of colistin plus high dose meropenem was used for both arms. Resistance rates were 0.7% (CAZ-AVI) and 7.6% (meropenem) for MDRE, and 10.7% (CAZ-AVI) and 35.5% (meropenem) for MDRPA. Effectiveness rates for CAZAVI and meropenem were based on a randomized, double-blind, phase 3 clinical trial. All cost data, including drugs, AEs, and hospitalization were localized to China. Utility values were based on response and sourced from the literature. Costs and benefits were discounted at 5% over the five year time horizon. Results. At a cost-effectiveness threshold of three-times GDP per capita, CAZAVI was cost-effective compared to meropenem for HAP/VAP caused by both MDRE and MDRPA with ICERs of ¥147,500 and ¥30,496, respectively. Specifically, CAZ-AVI had ¥13,699 and 0.09 additional total costs and QALYs, respectively, within MDRE; ¥5,207 and 0.17 additional total costs and QALYs, respectively, within MDRPA. Length of stay was reduced by 0.65 days and 1.37 in the CAZ-AVI arms of the MDRE and MDRPA analyses, respectively. Conclusion. CAZ-AVI is a cost-effective alternative to meropenem in the treatment of HAP/VAP caused by MDRE or MDRPA in China.