Number of Studies
One interpretation of this, in light of the observed benefit from the prudent/healthy diets, is that the absence of fruit, vegetables, poultry, fish, low-fat dairy, and whole grains is more impactful than the presence of deleterious foods.
1. Pierce JP, Natarajan L, Caan BJ, et al. Influence of a diet very high in vegetables, fruit, and fiber and low in fat on prognosis following treatment for breast cancer: the Women’s Healthy Eating and Living (WHEL) randomized trial. JAMA. 2007;298(3):289-298.
2. Gold EB, Pierce JP, Natarajan L, et al. Dietary pattern influences breast cancer prognosis in women without hot flashes: the women’s healthy eating and living trial. J Clin Oncol. 2009 Jan 20;27(3):352-359.