Breast cancer has been on a steady rise in India, since last decade . It is now the most common cancer in many cities and 2nd common cancer in rural areas, accounting to 25% of all female malignancies. Increased incidence of breast carcinoma has been attributed to a variety of factors including obesity, decreased breastfeeding, alcohol consumption and smoking etc.
Though obesity has been long associated with the prevalence of breast cancer, it has traditionally been measured in BMI, ie the average distribution of fat all through the body. What BMI fails to do is to identify where the fat is actually accumulating.
Breast Cancer and Waist Size
According to a study published in BMJ, a woman’s waist size is a better predictor of breast cancer than BMI. The fat tissue around waist though more metabolically active, increases the production of estrogen in the body which accelerates the growth of breast tumor.
What does the research say?
Researchers from UCL University college, London studied 98,324 women of >50 postmenopausal age who had no history of breast cancer. These women were made to fill questionnaires detailing their history of health, height, weight, lifestyle and also their skirt sizes. The participants were followed up subsequently over years and their health, lifestyle and skirt sizes were documented. During the follow up 1090 women developed breast cancer.
The result showed that “Between 25 and postmenopausal age, an increase in Skirt Size by one unit every decade increased the risk of postmenopausal breast cancer by 33% while decrease in Skirt Size was associated with lowering of risk.”
Expanding waist has been associated with other forms of cancer in the past including that of pancreas, prostate, ovaries and cervix. It’s no surprise that the belly fat also plays a role in breast cancer. But this result showed that the increase in skirt size, independent of BMI, increased the risk of breast cancer and that fat accumulated around waist is more dangerous than fat accumulated on other parts of the body.
This visceral fat can do more harm to a person’s body than the subcutaneous fat. Causing increased levels of estrogen, insulin resistance and fatty liver.