Differential benefit of adjuvant docetaxel-based chemotherapy in patients with early breast cancer according to baseline body mass index

Abstract

PURPOSE Lipophilic drugs, such as taxanes, have a high affinity for adipose tissue and a resulting higher volume of distribution. Here, we reanalyzed clinical trial data to investigate whether the efficacy of docetaxel-based chemotherapy differs from non-docetaxel–based chemotherapy in patients with breast cancer according to their baseline body mass index (BMI). PATIENTS AND METHODS We retrospectively analyzed data from all of the patients in the adjuvant BIG 2-98 trial (ClinicalTrials.gov identifier: NCT00174655; N 5 2,887) comparing non-docetaxel– to docetaxel-containing chemotherapy. BMI (kg/m2) was categorized as follows: 18.5 to, 25, lean; 25 to, 30, overweight; and $ 30, obese. Di..