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Type 2 Diabetes Linked to Colorectal Cancer
In 2000, the prevalence of type 2 diabetes was approximately 171 million worldwide, and 366 million people are projected to have the disease by 2030. Obesity, western-style diet and lack of physical activity are established risk factors for CRC. Hyperglycemia and hyperinsulinemia, which are especially pronounced during the early stages of type 2 diabetes, have been proposed as mediators for the association between CRC and type 2 diabetes. Although it is known that type 2 diabetes is associated with an increased risk of CRC, it is not clear if this association varies by gender or other factors.
"While our study supports an association of type 2 diabetes with colorectal cancer incidence among men, our results also suggest that insulin use is associated with a slight, but not a substantially increased, risk of colorectal cancer among men with type 2 diabetes," said Peter T. Campbell, PhD, of the American Cancer Society and lead author of this study. "Prevention strategies should emphasize adherence to guidelines intended for the general population such as smoking cessation, weight management, exercise and regular early detection exams."
In the final study of 73,312 men and 81,663 women, 1,567 men (227 with type 2 diabetes) and 1,242 women (108 with type 2 diabetes) were diagnosed with colon or rectal cancer by 2007. Among men, type 2 diabetes was associated with increased risk of incident CRC compared to not having type 2 diabetes. CRC risk was higher for those participants with type 2 diabetes regardless of whether or not they used insulin.
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More News on: Diabetic Retinopathy, Diabetes, Diabetic Diet, Otitis Media, Diabetes - Essentials, Cancer and Homeopathy, Diabetes - Self-Monitoring of Blood Glucose (SMBG), Insulin Delivery Devices, Diabetes and Exercise, Colo-rectal cancer - Management
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