© The Author 2007. Published by Oxford University Press.
EDITORIALS |
Fat Intake and Breast Cancer Revisited
Affiliations of authors: Departments of Nutrition and Epidemiology, Harvard School of Public Health, Boston, MA (SASW, MJS); Channing Laboratory, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (MJS)
Correspondence to: Meir J. Stampfer, MD, PhD, Department of Epidemiology, Harvard School of Public Health, 677 Huntington Ave, 3rd Fl, Boston, MA 02115 (e-mail: mstampfe@hsph.harvard.edu).
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The relationship between dietary fat and the risk of breast cancer has been controversial for decades. Early international correlation studies (1), buttressed by later casecontrol studies (2), suggested a positive relationship. However, the substantial confounding in the international correlation studies by many factorsespecially reproductive variablesand the potential for recall and selection biases in retrospective studies cast doubt on those results. Indeed, most prospective studies (2), including two large pooled analyses of prospective studies (3,4), have not demonstrated a link between fat intake and breast cancer risk.
However, several recent cohort studies have reported results that suggest a modest positive
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J Natl Cancer Inst 2007 99: 451-462.
J Natl Cancer Inst 2007 99: 413.
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