Obesity among premenopausal women may increase their risk of developing colorectal cancer.
Previous research has identified a risk in men, but has not pinpointed the same level of risk in women, point out Dr Peter Terry and colleagues at the Albert Einstein College of Medicine, New York.
They assessed risks for obese premenopausal women who were among 89,835 women who were aged between 40 and 59 at recruitment into the Canadian National Breast Screening Study.
The Canadian study was a multicentre randomized controlled trial of mammography screening for breast cancer. During an average 10.6 years of follow-up (936 433 person years), a total of 527 women were diagnosed with incident colorectal cancer: 363 colon and 164 rectal.
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