Abstract S6-6: A Phase III, open-label, randomized, multicenter study of eribulin mesylate versus capecitabine in patients with locally advanced or metastatic breast cancer previously treated with anthracyclines and taxanes
Bibliographic record
Abstract
Abstract Background: Eribulin is a non-taxane microtubule dynamics inhibitor. In a previous Phase III trial, eribulin demonstrated a statistically significant improvement in overall survival (OS) versus current treatments and a manageable toxicity profile, in heavily pre-treated patients (pts) with metastatic breast cancer (MBC). Here we report results from a Phase III trial of eribulin compared with capecitabine in earlier-line pts with MBC (NCT00337103). Patients and methods: Pts were randomized 1:1 to eribulin mesylate 1.4 mg/m2 given on Days 1 and 8 of a 21 day cycle or capecitabine 2.5 g/m2/day administered orally BID on Days 1 to 14 of a 21 day cycle. Eligible pts had received prior therapy including an anthracycline and taxane, and were receiving study drug as 1st, 2nd, or 3rd line therapy for advanced disease. The co-primary endpoints of this study were OS and progression free survival (PFS): pre-specified statistical significance at final analysis for eribulin versus capecitabine were p ≤ 0.0372 for OS and p < 0.01 for PFS. Secondary endpoints included objective response rate (ORR), quality of life (QoL) measured using the EORTC questionnaire, duration of response, 1-, 2- and 3-year survival, and safety. The study was stratified for geographic region and HER2 status. Results: Of 1102 pts, 554 were randomized to eribulin and 548 capecitabine (375 and 380 pts were HER2[−], respectively). The median age was 54.0 years (range 24–80). Pts received study treatment as their 1st (27.2%), 2nd (57.4%) or 3rd-line (14.7%) chemotherapeutic regimen in the setting of metastatic disease. The median number of treatment cycles was 6 for eribulin and 5 for capecitabine. Median OS was 15.9 and 14.5 months (hazard ratio [HR] 0.879; 95% confidence intervals [CI] 0.770–1.003; p = 0.056), and PFS (independent review) was 4.1 and 4.2 months (HR 1.079; 95% CI 0.932–1.250; p = 0.305) for eribulin and capecitabine, respectively. ORR (independent review) were 11.0% (95% CI 8.5–13.9) and 11.5% (95% CI 8.9–14.5; p = 0.849), respectively. OS for HER2(−) pts was 15.9 months for eribulin and 13.5 months for capecitabine (HR 0.838; 95% CI 0.715–0.983; p = 0.030). AEs were consistent with the known side-effect profiles of both drugs. The most common AEs for eribulin and capecitabine (>20% all grades) were neutropenia (54.2% vs 15.9%), hand-foot syndrome (0.2% vs 45.1%) alopecia (34.6% vs 4.0%), leukopenia (31.4% vs 10.4%), diarrhea (14.3% vs 28.8%), and nausea (22.2% vs 24.4%), respectively. Conclusion: In this Phase III trial, eribulin demonstrated a trend favoring improved OS, compared with capecitabine, although this improvement does not meet the pre-defined criteria for statistical significance. This study confirms eribulin as an active drug in pts with MBC, and exploratory analyses suggest possible benefits of eribulin in specific subsets of pts, sufficient to warrant further study. Citation Information: Cancer Res 2012;72(24 Suppl):Abstract nr S6-6.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".