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Body Mass Index Associated With Breast Cancer

by Sheela Philomena on April 16, 2014 at 7:37 PM
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 Body Mass Index Associated With Breast Cancer

Larger waist circumference is linked with an increased risk of postmenopausal breast cancer, finds study published in Cancer Causes, and Control.

A significant body of research has linked abdominal obesity to a number of conditions, including heart disease, type II diabetes, and breast and other cancers. Those studies have led to the theory that having an "apple shaped" body, with weight concentrated in the chest and torso, is riskier than having a "pear-shaped" body, with fat concentrated in the hips, thighs and buttocks.

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To explore the theory, researchers led by Mia Gadet, PhD, analyzed data from 28,965 women participating in the Cancer Prevention Study II. Among those women there were 1,088 invasive breast cancer cases diagnosed during a median 11.58 years of follow-up. They found a statistically significant positive association between waist circumference and postmenopausal breast cancer risk; however, when they adjusted for BMI, the association disappeared.

"The message is that if you have a high BMI, regardless if you are pear or apple shaped, you are at higher risk of breast cancer," said Dr. Gaudet. "Most prior studies on this issue looked at BMI or at waist circumference, but had not looked at them together. This study brings some clarity to the association between obesity and risk of breast cancer."
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Dr. Gaudet says the data could help women focus on what's important in what has been a confusing array of potential risk factors for breast cancer. "We know being overweight, particularly when the weight gain happened during adulthood, is one of the important modifiable risk factors for breast cancer in post-menopausal women. This new data indicates it's not what shape you are, it's what kind of shape you are in that probably ought to be their focus."

Source: Eurekalert
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