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J Natl Cancer Inst. 1990 Apr 4;82(7):561-9.

Dietary factors and risk of breast cancer: combined analysis of 12 case-control studies.

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  • 1Epidemiology Unit, National Cancer Institute of Canada, Faculty of Medicine, University of Toronto, ON.

Abstract

We conducted a combined analysis of the original data to evaluate the consistency of 12 case-control studies of diet and breast cancer. Our analysis shows a consistent, statistically significant, positive association between breast cancer risk and saturated fat intake in postmenopausal women (relative risk for highest vs. lowest quintile, 1.46; P less than .0001). A consistent protective effect for a number of markers of fruit and vegetable intake was demonstrated; vitamin C intake had the most consistent and statistically significant inverse association with breast cancer risk (relative risk for highest vs. lowest quintile, 0.69; P less than .0001). If these dietary associations represent causality, the attributable risk (i.e., the percentage of breast cancers that might be prevented by dietary modification) in the North American population is estimated to be 24% for postmenopausal women and 16% for premenopausal women.

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  • Combined analysis of breast cancer studies. [J Natl Cancer Inst. 1991]
PMID:
2156081
[PubMed - indexed for MEDLINE]
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