ABSTRACT
OBJECTIVE:To evaluate the cost-effectiveness of SOX regimen(tegafur+oxaliplatin)vs. CapeOX regimen (capecitabine+oxaliplatin)in the treatment of metastatic colorectal cancer,and to provide reference for exploring more economical first-line regimen of metastatic colorectal cancer. METHODS:Based on published high-quality Ⅲ-phase randomized controlled trial,Markov model was established according to the process of disease development in patients with metastatic colorectal cancer. The model was divided into progression-free survival state,progressive disease state and death state. Combined with relevant data of our hospital,pharmacoeconomic cost-effectiveness analysis was conducted for SOX regimen and CapeOX regimen. Sensitivity analysis validation model was used to analyze the stability of the model. RESULTS:According to the results of Markov model operation,compared to standard CapeOX regimen,SOX regimen could increase 0.14 QALYs,and cost increased by 35 493.45 yuan;incremental cost-effectiveness ratio was 253 524.64 yuan/QALYs,which was higher than willingness-to-pay(WTP) threshold(168 201.201 yuan/QALYs). Single factor sensitivity analysis showed that cost of oxaliplatin had the most important impact on the result of cost-effectiveness analysis. Probabilistic sensitivity analysis depicted that with the increase of GDP per capita,the probability of SOX regimen with cost-effectiveness would increase. CONCLUSIONS:At present,compared with standard CapeOX regimen,SOX regimen has no cost-effectiveness for metastatic colorectal cancer,which is not recommended as the first choice for first-line treatment of metastatic colorectal cancer.