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Comparative study of breast cancer in Mexican and Mexican-American women

Author(s): María Elena Martínez | Luis Enrique Gutiérrez-Millan | Melissa Bondy | Adrian Daneri-Navarro | María Mercedes Meza-Montenegro | Ivan Anduro-Corona | Ma Isabel Aramburo-Rubio | Luz María Adriana Balderas-Peña | José Adelfo Barragan-Ruiz | Abenaa Brewster | Graciela Caire-Juvera | Juan Manuel Castro-Cervantes | Mario Alberto Chávez Zamudio | Giovanna Cruz | Alicia Del Toro-Arreola | Mary E. Edgerton | María Rosa Flores-Marquez | Ramon Antonio Franco-Topete | Helga Garcia | Susan Andrea Gutierrez-Rubio | Karin Hahn | Luz Margarita Jimenez-Perez | Ian K. Komenaka | Zoila Arelí López Bujanda | Dihui Lu | Gilberto Morgan-Villela | James L. Murray | Jesse N. Nodora | Antonio Oceguera-Villanueva | Miguel Angel Ortiz Martínez | Laura Pérez Michel | Antonio Quintero-Ramos | Aysegul Sahin | Jeong Yun Shim | Maureen Stewart | Gonzalo Vazquez-Camacho | Betsy Wertheim | Rachel Zenuk | Patricia Thompson

Journal: Health
ISSN 1949-4998

Volume: 02;
Issue: 09;
Start page: 1040;
Date: 2010;
Original page

Keywords: Binational Study | Breast Cancer | Hispanics | Mexico | United States

Breast cancer is the number one cause of can- cer deaths among Hispanic women in the United States, and in Mexico, it recently became the primary cause of cancer deaths. This malign- nancy represents a poorly understood and un- derstudied disease in Hispanic women. The ELLA Binational Breast Cancer Study was es- tablished in 2006 as a multi-center study to as- sess patterns of breast tumor markers, clinical characteristics, and their risk factors in women of Mexican descent. We describe the design and implementation of the ELLA Study and provide a risk factor comparison between women in the U.S. and those in Mexico based on a sample of 765 patients (364 in the U.S. and 401 in Mexico). Compared to women in Mexico, U.S. women had significantly (p < 0.05) lower parity (3.2 vs. 3.9 mean live births) and breastfeeding rates (57.5% vs. 80.5%), higher use of oral contraceptives (60.7% vs. 50.1%) and hormone replacement therapy (23.3% vs. 7.6%), and higher family history of breast cancer (15.7% vs. 9.0%). Re- sults show that differences in breast cancer risk factor patterns exist between Mexico and U.S. women. We provide lessons learned from the conduct of our study. Binational studies are an important step in understanding disease pat- terns and etiology for women in both countries.
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