Published by Oxford University Press on behalf of the International Epidemiological Association © The Author 2006; all rights reserved.
Commentary |
Commentary: Fat and breast cancer: time to re-evaluate both methods and results?
MRC Centre for Nutrition and Cancer, Department of Public Health and Primary Care, Institute of Public Health, University of Cambridge School of Clinical Medicine, UK
* Corresponding author. MRC Centre for Nutrition and Cancer, Department of Public Health and Primary Care, Institute of Public Health, University of Cambridge School of Clinical Medicine, Strangeways Research Laboratory, Wort's Causeway, Cambridge CB1 8RN, UK. E-mail: Sheila.bingham@srl.cam.ac.uk.
| The first 150 words of the full text of this article appear below. |
International comparisons, comparisons within countries, time trends within countries, case–control studies, and animal studies are all consistent with a positive relationship between incidence of breast cancer and fat consumption.1 Cohort studies are normally considered free of the bias that potentially affect case–control studies, but, in contrast to expectations that a relationship would be confirmed, reports of pooled cohort data show no relation between total or types of fat intake and breast cancer risk.2 In a summary of the prospective studies relating fat to breast cancer risk, it was concluded that there was moderate evidence to conclude that total fat in adult life ‘does not influence’ the risk of breast cancer independently of BMI,1 while in another summary in which evidence from both case–control and prospective studies was used, the evidence of increased risk was classified as ‘possible’.3
However, concerns about the accuracy of dietary assessment methods used in the epidemiology
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