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Macronutrient Composition Influence on Breast Cancer Risk in Hispanic and Non-Hispanic White Women: The 4-Corners Breast Cancer Study

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The association of dietary macronutrient composition with risk of breast cancer is not well understood. We investigated the macronutrient composition of diet in the 4-Corners Breast Cancer Study. Logistic regression models were used for case-control comparisons adjusted for age, center, education, smoking, total activity, calories, dietary fiber, dietary calcium, height, parity, recent hormone exposure, reference year body mass index (BMI), and the interaction of BMI and recent hormone exposure. Breast cancer risk declined with increasing dietary fat and increased with carbohydrates similarly across ethnicity and menopausal status. Associations of carbohydrate (direct) and fat (inverse), particularly saturated and monounsaturated fat, with breast cancer were present among normal and overweight postmenopausal women and absent among obese postmenopausal women. No substantive differences were noted in the association of macronutrients with risk of breast cancer between non-Hispanic white and Hispanic women. Associations of the macronutrients carbohydrate and fat with breast cancer risk were attenuated among postmenopausal obese women.

Document Type: Research Article

Affiliations: 1: Department of Internal Medicine, University of Utah, Salt Lake City, Utah, USA 2: H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, USA 3: Department of Epidemiology and Public Health, University of Louisville, Louisville, Kentucky, USA 4: University of Colorado School of Public Health, Aurora, Colorado, USA

Publication date: February 11, 2011

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