Cost per QALY . Paclitaxel generates 0.511.1 QALYs and docetaxel (Taxotere) 0.6016 QALYs . . a difference of 0.0905 QALYs, equivalent to an additional 33 days of perfect health (0.0905 x 365). . The additional costs of docetaxel amount to f220 per patient, which means that it costs f2,431 (E220/0.0905) to generate an additional QALY by using docetaxel. Hutton J, Brown R, Borowitz M et al. A new decision model for cost-utility comparisons of chemotherapy in recurrent metastatic breast cancer. PharmacoEconomics 196; 9 (Supply: 8-22