Trial reportJournal of clinical oncology : official journal of the American Society of Clinical Oncology2016
Phase III Trial Evaluating Letrozole As First-Line Endocrine Therapy With or Without Bevacizumab for the Treatment of Postmenopausal Women With Hormone Receptor-Positive Advanced-Stage Breast Cancer: CALGB 40503 (Alliance).
Trial report in Journal of clinical oncology : official journal of the American Society of Clinical Oncology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 58 papers, 9 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
58 citing papers in PubMed, 9 syntheses or guidelines pooled it, 127 citations in OpenAlex.
- Impact of vascular endothelial growth factor inhibitor-induced hypertension on continued cancer treatment: a systematic review and meta-analysis.Hypertension research : official journal of the Japanese Society of Hypertension · 2026Pooled it
- The efficacy of angiogenesis inhibitors combined with chemotherapy in advanced breast cancer: a systematic review and meta-analysis.Frontiers in oncology · 2026Pooled it
- Association between increased proteinuria induced by Bevacizumab, Ramucirumab, and Aflibercept and the risk of renal impairment and failure: a systematic review and meta-analysis.International journal of clinical oncology · 2025Pooled it
- Efficacy and Safety of Bevacizumab in Pretreated Metastatic Breast Cancer: A Systematic Review and Meta-Analysis.Oncology research and treatment · 2022Pooled it
- Overcoming resistance to endocrine therapy in hormone receptor-positive human epidermal growth factor receptor 2-negative (HRFrontiers of medicine · 2021Pooled it
- Review of concepts in therapeutic decision-making in HER2-negative luminal metastatic breast cancer.Clinical & translational oncology : official publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico · 2020Pooled it
- Quality of adverse event reporting in phase III randomized controlled trials of breast and colorectal cancer: A systematic review.Cancer medicine · 2020Pooled it
- Pooled it
- Surrogate threshold effect based on a meta-analysis for the predictive value of progression-free survival for overall survival in hormone receptor-positive, HER2-negative metastatic breast cancer.Breast cancer research and treatment · 2019Pooled it
- Bevacizumab-induced hypertension and proteinuria: a genome-wide study of more than 1000 patients.British journal of cancer · 2022Trial
- Genome-wide association studies of survival in 1520 cancer patients treated with bevacizumab-containing regimens.International journal of cancer · 2022Trial
- TBCRC 002: a phase II, randomized, open-label trial of preoperative letrozole with or without bevacizumab in postmenopausal women with newly diagnosed stage 2/3 hormone receptor-positive and HER2-negative breast cancer.Breast cancer research : BCR · 2020Trial
- Evaluating the addition of bevacizumab to endocrine therapy as first-line treatment for hormone receptor-positive metastatic breast cancer: a pooled analysis from the LEA (GEICAM/2006-11_GBG51) and CALGB 40503 (Alliance) trials.European journal of cancer (Oxford, England : 1990) · 2019Trial
- Overall Survival with Fulvestrant plus Anastrozole in Metastatic Breast Cancer.The New England journal of medicine · 2019Trial
- Identification of risk factors for toxicity in patients with hormone receptor-positive advanced breast cancer treated with bevacizumab plus letrozole: a CALGB 40503 (alliance) correlative study.Breast cancer research and treatment · 2018Trial
- E-cadherin inactivation shapes tumor microenvironment specificities in invasive lobular breast cancer.Nature communications · 2026Article
- Current issues in dose-finding designs: A response to the US Food and Drug Adminstration's Oncology Center of Excellence Project Optimus.Clinical trials (London, England) · 2024Article
- Article
- Article
- Efficacy and safety of anlotinib for triple-negative breast cancer with brain metastases.Frontiers in oncology · 2024Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
15 authors at 1 institution in 1 country.
Funding
Abstract
purposeTo investigate whether anti-vascular endothelial growth factor therapy with bevacizumab prolongs progression-free survival (PFS) when added to first-line letrozole as treatment of hormone receptor-positive metastatic breast cancer (MBC). PATIENTS AND
methodsWomen with hormone receptor-positive MBC were randomly assigned 1:1 in a multicenter, open-label, phase III trial of letrozole (2.5 mg orally per day) with or without bevacizumab (15 mg/kg intravenously once every 3 weeks) within strata defined by measurable disease and disease-free interval. This trial had 90% power to detect a 50% improvement in median PFS from 6 to 9 months. Using a one-sided α = .025, a target sample size of 352 patients was planned.
resultsFrom May 2008 to November 2011, 350 women were recruited; 343 received treatment and were observed for efficacy and safety. Median age was 58 years (range, 25 to 87 years). Sixty-two percent had measurable disease, and 45% had de novo MBC. At a median follow-up of 39 months, the addition of bevacizumab resulted in a significant reduction in the hazard of progression (hazard ratio, 0.75; 95% CI, 0.59 to 0.96; P = .016) and a prolongation in median PFS from 15.6 months with letrozole to 20.2 months with letrozole plus bevacizumab. There was no significant difference in overall survival (hazard ratio, 0.87; 95% CI, 0.65 to 1.18; P = .188), with median overall survival of 43.9 months with letrozole versus 47.2 months with letrozole plus bevacizumab. The largest increases in incidence of grade 3 to 4 treatment-related toxicities with the addition of bevacizumab were hypertension (24% v 2%) and proteinuria (11% v 0%).
conclusionThe addition of bevacizumab to letrozole improved PFS in hormone receptor-positive MBC, but this benefit was associated with a markedly increased risk of grade 3 to 4 toxicities. Research on predictive markers will be required to clarify the role of bevacizumab in this setting.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.