Obesity as an independent risk factor for decreased survival in node-positive high-risk breast cancer.

Scholz, Christoph; Andergassen, U; Hepp, P; Schindlbeck, C; Friedl, Thomas W P; Harbeck, N; Kiechle, M; Sommer, H; Hauner, H; Friese, K; Rack, B; Janni, W

doi:10.1007/s10549-015-3422-3

2015

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Titel:: Obesity as an independent risk factor for decreased survival in node-positive high-risk breast cancer.
Dokumenttyp:: Journal Article; Article
Autor(en):: Scholz, Christoph; Andergassen, U; Hepp, P; Schindlbeck, C; Friedl, Thomas W P; Harbeck, N; Kiechle, M; Sommer, H; Hauner, H; Friese, K; Rack, B; Janni, W
Abstract:: Obese breast cancer patients have a higher risk of lymph node metastasis and a poorer prognosis compared to patients with normal weight. For obese women with node-positive breast cancer, an association between body weight and prognosis remains unclear. In this retrospective study, we analyzed patient data from the Phase-III ADEBAR trial, in which high-risk breast cancer patients (pT1-4, pN2-3, pM0) were randomized into a docetaxel-based versus epirubicin-based chemotherapy regimen. Patients were grouped according to their BMI value as underweight/normal weight (BMI < 25 kg/m(2); n = 543), overweight (BMI 25-29.9 kg/m(2); n = 482) or obese (BMI >= 30 kg/m(2); n = 285). Overweight and obese patients were older, had larger tumors and were more likely to be postmenopausal at the time of diagnosis compared to underweight/normal-weight patients (all p < 0.001). Multivariate Cox regression analyses adjusting for age and histopathological tumor features showed that obese patients had a significantly shorter disease-free survival (DFS; HR 1.43; 95 % CI 1.11-1.86; p = 0.006) and overall survival (OS; HR 1.56; 95 % CI 1.14-2.14; p = 0.006) than non-obese patients. Subgroup analyses revealed that the differences in DFS and OS were significant for postmenopausal but not for premenopausal patients, and that the survival benefit of non-obese patients was more pronounced in women with hormone-receptor-positive disease. Obesity constitutes an independent, adverse prognostic factor in high-risk node-positive breast cancer patients, in particular for postmenopausal women and women with hormone-receptor-positive disease.
Zeitschriftentitel:: Breast Cancer Res Treat
Jahr:: 2015
Band / Volume:: 151
Heft / Issue:: 3
Seitenangaben Beitrag:: 569-76
Sprache:: eng
Volltext / DOI:: doi:10.1007/s10549-015-3422-3
PubMed:: http://view.ncbi.nlm.nih.gov/pubmed/25962694
Print-ISSN:: 0167-6806
TUM Einrichtung:: Else Kröner-Fresenius-Zentrum für Ernährungsmedizin - Klinik für Ernährungsmedizin; Frauenklinik und Poliklinik
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