Predictors of early relapse in postmenopausal women with hormone receptor-positive breast cancer in the BIG 1-98 trial

Mauriac, L; Keshaviah, A; Debled, M; Mouridsen, H; Forbes, JF; Thürlimann, B; Paridaens, R; Monnier, A; Láng, I; Wardley, A; Nogaret, JM; Gelber, RD; Castiglione-Gertsch, M; Price, KN; Coates, AS; Smith, I; Viale, G; Rabaglio, M; Zabaznyi, N; Goldhirsch, A; ... (2007). Predictors of early relapse in postmenopausal women with hormone receptor-positive breast cancer in the BIG 1-98 trial. Annals of oncology, 18(5), pp. 859-67. Oxford: Oxford University Press 10.1093/annonc/mdm001

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BACKGROUND: Aromatase inhibitors are considered standard adjuvant endocrine treatment of postmenopausal women with hormone receptor-positive breast cancer, but it remains uncertain whether aromatase inhibitors should be given upfront or sequentially with tamoxifen. Awaiting results from ongoing randomized trials, we examined prognostic factors of an early relapse among patients in the BIG 1-98 trial to aid in treatment choices. PATIENTS AND METHODS: Analyses included all 7707 eligible patients treated on BIG 1-98. The median follow-up was 2 years, and the primary end point was breast cancer relapse. Cox proportional hazards regression was used to identify prognostic factors. RESULTS: Two hundred and eighty-five patients (3.7%) had an early relapse (3.1% on letrozole, 4.4% on tamoxifen). Predictive factors for early relapse were node positivity (P < 0.001), absence of both receptors being positive (P < 0.001), high tumor grade (P < 0.001), HER-2 overexpression/amplification (P < 0.001), large tumor size (P = 0.001), treatment with tamoxifen (P = 0.002), and vascular invasion (P = 0.02). There were no significant interactions between treatment and the covariates, though letrozole appeared to provide a greater than average reduction in the risk of early relapse in patients with many involved lymph nodes, large tumors, and vascular invasion present. CONCLUSION: Upfront letrozole resulted in significantly fewer early relapses than tamoxifen, even after adjusting for significant prognostic factors.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Haematology, Oncology, Infectious Diseases, Laboratory Medicine and Hospital Pharmacy (DOLS) > Clinic of Medical Oncology

UniBE Contributor:

Rabaglio, Manuela

ISSN:

0923-7534

ISBN:

17301074

Publisher:

Oxford University Press

Language:

English

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 14:53

Last Modified:

25 Oct 2019 20:23

Publisher DOI:

10.1093/annonc/mdm001

PubMed ID:

17301074

Web of Science ID:

000247241200007

BORIS DOI:

10.7892/boris.22411

URI:

https://boris.unibe.ch/id/eprint/22411 (FactScience: 34550)

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