A new analysis of 49 previous studies has reported that dietary patterns influence the risk of breast cancer. Eighteen case-control and cohort studies were included that identified prudent/healthy dietary patterns, 27 that compromised Western/unhealthy, and four that examined drinker dietary patterns. An 11% reduced risk of breast cancer was observed in the highest compared to the lowest consumers of prudent/healthy diets.

A 21% increase in the risk of breast cancer was found for the highest compared with the lowest categories of a drinker dietary pattern. However, no difference in the risk of breast cancer between the highest and the lowest categories of Western/unhealthy dietary patterns was found. The authors conclude that some dietary patterns may be associated with breast cancer risk.