Objective: Breast cancer is the most common cancer in Indonesia, with Indonesia's breast cancer mortality rate being the highest among Southeast Asian countries. This study aims to evaluate the cost-effectiveness and budget impacts of adding trastuzumab to chemotherapy versus chemotherapy alone for HER2-positive breast cancer patients in Indonesia.
Methods: We performed a Markov model-based economic evaluation to assess cost-effectiveness, cost-utility, and budget impact. Utility data, direct medical costs, and indirect costs were obtained primarily from interviewing patients. Clinical effectiveness data, on the other hand, were obtained from systematic reviews and real-world data and represented through progression free survival, overall survival, and quality-adjusted life years (QALYs).
Result: From a healthcare provider's perspective, the total costs for the combined group were USD 14,516, while chemotherapy alone cost USD 7,489. While the cost-effectiveness analysis showed that the combination group had a higher total cost by USD 7,027, PFS was longer in the chemotherapy alone group, with a difference of 2.2 months. The ICER was USD 17,307 for every QALY gained. The total cost of adding trastuzumab over a 5-year period was USD 589 million.
Conclusion: In conclusion, this economic evaluation suggests that the addition of trastuzumab to standard chemotherapy is not cost-effective in terms of PFS and OS compared with chemotherapy alone.<br />.
Keywords: Cost-Effectiveness; Economic Evaluation; HER2-positive; Trastuzumab; breast cancer.