Cost-Utility Analysis of First-Line Pemetrexed Plus Cisplatin in Non-Small Cell Lung Cancer in Thailand.

ABSTRACT

OBJECTIVE: To assess the cost-effectiveness of first-line chemotherapy regimens for non-small cell lung cancer patients in Thailand. METHODS: A Markov model comprising 3 health states (progression-free survival, progression, death) was used to estimate the long-term costs and health outcomes under a societal perspective with a lifetime horizon. Intervention was the combination of pemetrexed and cisplatin, AND the comparators were gemcitabine plus cisplatin and carboplatin plus paclitaxel. The efficacy and toxicity were obtained from landmark clinical trials, and the costs were based on a local Thai database. All costs and outcomes were discounted at 3%. The findings were reported as incremental cost-effectiveness ratios (ICERs) in both Thai baht (THB) and USD per quality-adjusted life year (QALY) gained. A series of sensitivity analyses, including 1-way and probabilistic sensitivity analyses, were performed. A cost-effectiveness acceptability curve was generated with a threshold of 160 000 THB/QALY or 4987 USD/QALY. RESULTS: Under the base-case analysis, pemetrexed plus cisplatin had the greatest total cost among 3 regimens, yielding an ICER of 64 369.97 USD/QALY (2 064 989 THB/QALY) compared with gemcitabine plus cisplatin, and ICER of 8649.16 USD/QALY (277 465 THB/QALY) compared with carboplatin plus paclitaxel. The probabilistic sensitivity analysis results indicated that at the local Thai threshold, gemcitabine plus cisplatin was likely to be the most cost-effective regimen. CONCLUSIONS: At the current price of pemetrexed, the combination of pemetrexed plus cisplatin was not found to be a cost-effective first-line regimen for patients with non-small cell lung cancer at the local Thai threshold compared with the gemcitabine plus cisplatin and carboplatin plus paclitaxel regimens.