Key clinical point: A de-escalated zoledronate schedule (≤6 infusions) did not affect breast cancer (BC)-specific survival outcomes in patients with hormone receptor-positive early BC.
Major finding: After a median follow-up of 96 months, the rates of disease-free survival were similar between patients who received ≤6 and ≥7 infusions (stratified hazard ratio 0.88; log-rank P = .64); however, there was an increase in adverse events, particularly arthralgia (P = .012) and nausea (P = .017), among patients who received ≥7 vs ≤6 infusions.
Study details: Findings are a substudy of the ABCSG-12 trial including 725 premenopausal women with early BC who were randomly assigned to receive hormone therapy (tamoxifen or anastrozole with goserelin) with or without zoledronic acid.
Disclosures: This study did not receive any funding. The authors declared no conflicts of interest.
Source: Beltran-Bless AA et al. Does the number of 6-monthly adjuvant zoledronate infusions received affect treatment efficacy for early breast cancer? A sub-study of ABCSG-12. Eur J Cancer. 2022;180:108-116 (Dec 31). Doi: 10.1016/j.ejca.2022.12.003