Cost-utility model comparing docetaxel and paclitaxel in advanced breast cancer patients

Abstract

Relevant data from direct comparisons in clinical trials are not available for economic evaluations of docetaxel and paclitaxel in the management of metastatic breast cancer. A modified Markov model is used to estimate the incremental cost in US$ per quality-adjusted life-year (QALY) for docetaxel versus paclitaxel in managing metastatic breast cancer patients in the US. The model incorporates the latest available clinical trial data (response rates of 47.8% for docetaxel and 25% for paclitaxel, chemotherapy-specific toxicities, time to progression, and 1-year survival) from studies against other comparators. Medical care resources were estimated by US oncologists and costed using US data sources. Utility scores were obtained from 29 US oncology nurses. The base case and subsequent sensitivity analyses show that docetaxel management of advanced breast cancer is more costly per patient but yields higher health benefits than paclitaxel therapy. The cost per QALY gained by docetaxel is $8615, and ranges between $3943 and $9416 in sensitivity analyses. These results confirm those of an earlier model using preliminary data and compare favorably with other cost-utility results in this patient group.

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