QUICKLINKS AND VIEW OPITONS
Being overweight at 18 lowers the risk of breast cancer both pre- and post-menopausal in Black women
Monday, September 17, 2007 10:08 am Email this article
Studies of White women have found that being overweight lowers the risk of premenopausal breast cancer, but increases the risk of postmenopausal breast cancer. However, this does not seem to be the case with Black women according to a study from Boston University in Boston, Massachusetts, USA. Breast Cancer
32% less premenopausal breast cancer, 47% less postmenopausal breast cancer in overweight Black women;
Black women who were overweight at the age of 18, that is have a body mass index (BMI) of 25 or more, are 32 percent less likely to get premenopausal breast cancer and 47 percent less likely to get postmenopausal breast cancer than lean women with a BMI of less than 20.
The heavier women were at the age of 18, the lower their risk of premenopausal breast cancer.
This association was not found in relationship to the risk of postmenopausal breast cancer.
Weight gain not associated with postmenopausal breast cancer
Weight gain was not associated with the risk of postmenopausal breast cancer.
Other studies have found an increase is postmenopausal breast cancer in heavier women
A previous study being overweight increases the risk of postmenopausal breast cancer by 30 percent in women, while being obese increases the risk 50 percent. This does not seem to be the case in Black women.
Another study found that adult weight gain of 21-30 pounds increases the risk of postmenopausal breast cancer by 40 percent, and a 70 pound weight gain increases the risk by 100 percent, in other words, it doubles the risk. Again, this does not seem to be the case for Black women.
Conclusion: Being overweight is associated will less breast cancer in Black women
“The findings indicate that being overweight at age 18 years is associated with a reduced risk of both premenopausal and postmenopausal breast cancer in African American women,” the researchers concluded.
Subjects: 59,000 Black women followed for 10 years
The study involved 59,000 Black women who, in 1995, completed a questionaire as part of the Black Women’s Health Study and who were followed for 10 years.
Comments: Being heavier must increase protective hormones
I assume that the reason for a lower risk of breast cancer both before and after menopause in heavier black women is due to a shift in hormones that have a protective effect, however, I do not know which hormones it is that are causing this protection.
Palmer J, Adams-Campbell LL, Boggs DA, Wise LA, Rosenberg L. A prospective study of body size and breast cancer in black women. Cancer Epidemiol Biomarkers Prev. 2007 Sep, 16(9):1795-802.
AUTHOR’S CONTACT INFORMATION
Slone Epidemiology Center
1010 Commonwealth Avenue, Boston, MA 02215
Articles on the same subject can be found here:
Please feel free to share your comments about this article.
© Copyright 2003-2017 - Larry Hobbs - All Rights Reserved.