Vegetarian diet or fish diet and the risk of breast cancer

Does a vegetarian diet or a fish diet reduce the risk of breast cancer?

In this study from the Centre for Epidemiology and Biostatistics, University of Leeds in the United Kingdom, four common dietary patterns were assessed at baseline by using a 217-item food frequency questionnaire. The included 35,372 women aged between 35 and 69 years.

Terms mentioned in this study: postmenopausal, dietary pattern, UK Women's Cohort Study (UKWCS).

The authors conclude that a fish diet was associated with a lower risk of breast cancer in postmenopausal women; but not for a vegetarian diet.

Common dietary patterns and risk of breast cancer: analysis from the United Kingdom Women's Cohort Study.
Nutr Cancer. 2010 Apr;62(3):300-6.