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HLX02 is a newly marketed trastuzumab biosimilar in China, but whether its price reflects a potential benefit in terms of its value remains unclear. In addition, the development of biosimilars in China is just beginning, and the state encourages health economic evaluation of newly marketed biosimilars. Based on the previously published randomized controlled trial data, a Markov model was used to perform health economic evaluation of HLX02 and trastuzumab in the treatment of HER2-positive recurrent or metastatic breast cancer, calculate quality-adjusted life years (QALYs) and incremental cost-effectiveness ratio (ICER), and evaluate the robustness of the model with sensitivity analysis. The model results showed that the 5-year mortality rate was 84.4% in the HLX02 group, while the mortality rate was 91.2% in the trastuzumab group. When without accounting for the cost of second-line treatment, patients treated with HLX02 had an increased life expectancy of 0.138 QALYs and a $421.11 lower cost compared with patients in the trastuzumab group, with an ICER value of -$3,051.52/QALY. At the willingness-to-pay threshold of $37,653/QALY in China, HLX02 is more cost-effective than trastuzumab. However, the relevant systems for the regulation of biosimilars still need to be improved.

expert review of pharmacoeconomics and outcomes research

Trastuzumab biosimilar HLX02 versus reference trastuzumab in patients with recurrent or metastatic HER2-positive breast cancer: a model-based economic evaluation for China