Symptoms of endocrine treatment and outcome in the BIG 1-98 study
J Huober, B F Cole, M Rabaglio, A Giobbie-Hurder, J Wu, B Ejlertsen, H Bonnefoi, J F Forbes, P Neven, I Láng, I Smith, A Wardley, K N Price, A Goldhirsch, A S Coates, M Colleoni, R D Gelber, B Thürlimann, BIG 1-98 Collaborative and International Breast Cancer Study Groups, J Huober, B F Cole, M Rabaglio, A Giobbie-Hurder, J Wu, B Ejlertsen, H Bonnefoi, J F Forbes, P Neven, I Láng, I Smith, A Wardley, K N Price, A Goldhirsch, A S Coates, M Colleoni, R D Gelber, B Thürlimann, BIG 1-98 Collaborative and International Breast Cancer Study Groups
Abstract
There may be a relationship between the incidence of vasomotor and arthralgia/myalgia symptoms and treatment outcomes for postmenopausal breast cancer patients with endocrine-responsive disease who received adjuvant letrozole or tamoxifen. Data on patients randomized into the monotherapy arms of the BIG 1-98 clinical trial who did not have either vasomotor or arthralgia/myalgia/carpal tunnel (AMC) symptoms reported at baseline, started protocol treatment and were alive and disease-free at the 3-month landmark (n = 4,798) and at the 12-month landmark (n = 4,682) were used for this report. Cohorts of patients with vasomotor symptoms, AMC symptoms, neither, or both were defined at both 3 and 12 months from randomization. Landmark analyses were performed for disease-free survival (DFS) and for breast cancer free interval (BCFI), using regression analysis to estimate hazard ratios (HR) and 95 % confidence intervals (CI). Median follow-up was 7.0 years. Reporting of AMC symptoms was associated with better outcome for both the 3- and 12-month landmark analyses [e.g., 12-month landmark, HR (95 % CI) for DFS = 0.65 (0.49-0.87), and for BCFI = 0.70 (0.49-0.99)]. By contrast, reporting of vasomotor symptoms was less clearly associated with DFS [12-month DFS HR (95 % CI) = 0.82 (0.70-0.96)] and BCFI (12-month DFS HR (95 % CI) = 0.97 (0.80-1.18). Interaction tests indicated no effect of treatment group on associations between symptoms and outcomes. While reporting of AMC symptoms was clearly associated with better DFS and BCFI, the association between vasomotor symptoms and outcome was less clear, especially with respect to breast cancer-related events.
Trial registration: ClinicalTrials.gov NCT00004205.
Conflict of interest statement
Author Conflicts
None: Jens Huober, Bernard F. Cole, Manuela Rabaglio, Anita Giobbie-Hurder, Jimin Wu, Karen N. Price, Alan S. Coates, Richard D. Gelber, Hervé Bonnefoi, István Láng, Ian Smith, Marco Colleoni, Aron Goldhirsch, Patrick Neven
Novartis advisory board, Novartis research support: Bent Ejlertsen
Novartis honoraria: Andrew Wardley, John F. Forbes
Astra Zeneca honoraria, Genomic health consultancy/advisory: John F. Forbes
Novartis stock: Beat Thürlimann
Figures
Source: PubMed