Quality of life during and after adjuvant anthracycline-taxane-based chemotherapy with or without Gemcitabine in high-risk early breast cancer: results of the SUCCESS A trial

In high-risk early breast cancer, adjuvant taxane-Gemcitabine combinations result in a recurrence-free survival similar to single-agent taxanes. However, haematologic toxicities and need for dose reductions are more frequent in combinations. Which option ultimately provides a better quality of life (QoL) is unknown. We compared the QoL curves before, during, and up to one year after three cycles of Fluorouracil–epirubicin–cyclophosphamide followed by three cycles of Docetaxel–Gemcitabine or Docetaxel. Overall, 3691 women with recent R0-resection of a primary epithelial breast cancer participated in the nationwide SUCCESS A clinical trial. The centres sent QoL questionnaires of the European Organisation for Research and Treatment of Cancer before and up to 15 months after randomisation to Docetaxel–Gemcitabine versus Docetaxel. Multilevel analysis by chemotherapy arm estimated the QoL time curves, questionnaire return, and dropout. The combination caused one-point higher global QoL (95% confidence ±1; p = 0.05) and 1.1 lower odds of adherence to the outcome (95% confidence 1.0–1.1; p = 0.23) than the monotherapy. In both groups, a 10-point decrease during therapy preceded a 16-point increase after chemotherapy (p