The Cost-Effectiveness of Sugemalimab Plus Chemotherapy as First-Line Treatment for Metastatic Squamous and Non-squamous NSCLC in China.

Abstract

Sugemalimab is the first China-developed programmed death-ligand 1 inhibitor that has proved to be effective as a first-line treatment for both metastatic squamous and non-squamous non-small cell lung cancer (NSCLC) when used in combination with chemotherapy. This study compared the cost-effectiveness of sugemalimab plus chemotherapy (sugema + chemo) with placebo plus chemotherapy (placebo + chemo) among metastatic squamous and nonsquamous NSCLC, respectively. Separate Markov models were constructed to generate the cumulative healthcare costs and quality-adjusted life-years (QALYs) associated with two treatment strategies over a 20-year time horizon. Transition probabilities were estimated using survival data reported in the GEMSTONE-302 trial. Health state utilities and costs were derived from published literature, national databases, and local general hospitals. Sensitivity analyses were performed to test the robustness of our conclusions. Compared with first-line placebo + chem, sugema + chemo achieved an incremental cost-effectiveness ratio (ICER) of $57,842/QALY for patients with metastatic squamous NSCLC and achieved an ICER of $78,249/QALY for patients with metastatic non-squamous NSCLC. In our sensitivity analyses of a willingness-to-pay (WTP) threshold of $35,663 per QALY, the first-line sugema + chemo was only cost-effective for patient groups when the price of sugemalimab decreased. Sugema + chemo was not cost-effective as a first-line treatment for either metastatic squamous or metastatic nonsquamous NSCLC in Chinese patients compared with placebo + chemo. However, we found that sugema + chemo would be cost-effective in patients withmetastatic squamous and non-squamous NSCLC when sugemalimab's price was decreased by > 39.0% and 64.8%, respectively.