British researchers suggest that going up a size every 10 years raised chances of disease by 33 percent
WebMD News from HealthDay
By Kathleen Doheny
HealthDay Reporter
WEDNESDAY, Sept. 24, 2014 (HealthDay News) -- If you want to minimize your chances of developing breast cancer, staying the same skirt size over the years might help, a new study suggests.
"Our study has shown that an increase of one size every 10 years between 25 and postmenopausal age [over 60] is associated with an increase of breast cancer [risk] in postmenopausal women by 33 percent," said lead researcher Dr. Usha Menon, head of the Gynecological Cancer Research Center at University College London.
The findings are based on information from nearly 93,000 women enrolled in a British database for cancer screening. When the women entered the study between 2005 and 2010, all were over age 50. None had a diagnosis of breast cancer.
At age 25, the women's average skirt size had been an 8. When they entered the study, at the average age of 64, the average size was a 10. Three out of four women reported increased skirt sizes.
The risk of breast cancer increased 77 percent if the skirt size went up two sizes every 10 years from 25 until women were past menopause, Menon said.
Put another way, for each size increase every 10 years, the five-year risk of developing breast cancer after menopause rose from one in 61 to one in 51, Menon estimated.
The study is published online Sept. 24 in BMJ Open.
The women provided information about their height and weight, so body mass index (BMI) could be calculated. They also gave details about other factors that could affect breast cancer risk. This information included fertility, family history of breast or ovarian cancers and reproductive information, along with use of hormonal birth control and hormone replacement therapy.
When they entered the study, the women told their current skirt size and what it had been in their 20s.
The researchers monitored the women for three to four years, asking more questions about general health and any cancer diagnosis. During that time, 1,090 women were diagnosed with breast cancer.
While risk factors such as family history and use of hormone replacement were linked with an increased risk, as expected, increases in skirt size emerged as the strongest predictor, Menon said.
"This is an observational study and no definitive conclusion can be drawn about cause and effect," Menon stressed. Changes in skirt sizing over the years also need to be taken into account, she added.
Skirt size served as a "proxy" for abdominal weight gain, Menon explained. The investigators found it was a better predictor of risk than BMI -- a ratio of weight to height -- alone.
Needing a bigger skirt size reflects an increase in abdominal fat, Menon said. The exact mechanism between increased abdominal fat and higher breast cancer risk needs more study, Menon said. But it is known that obesity increases the amount of estrogen in the body, which many breast cancers need to grow.
source : Increasing Skirt Sizes May Hike Your Breast Cancer Risk: Study
