The burden of type 2 diabetes and colorectal cancer tends to be disproportionate among low socioeconomic status and African American populations, and although diabetes is an emerging risk factor for colorectal cancer, the association between diabetes and colorectal cancer in these populations has not yet been adequately studied. In a recent study published in the international journal JAMA Network Open entitled "Type 2 Diabetes and Colorectal Cancer Risk," scientists from the University of Wisconsin and other institutions found that type 2 diabetes may be associated with an increased risk of colorectal cancer. Type 2 diabetes may be associated with an increased risk of colorectal cancer, and this association may be even stronger in individuals who do not undergo colonoscopy and have a history of smoking.
In the article, researchers conducted a cohort study to analyze whether there was an association between diabetes and colorectal cancer risk in understudied populations, using data from the Prospective Southern Community Cohort Study, which consisted of 54,597 participants, including 66 percent of African-Americans, and 53 percent of participants with incomes of less than $15,000 per year.
The results of the study found that 289 of 25,992 participants with diabetes developed colorectal cancer, compared to 197 individuals of 28,605 participants without diabetes, and that there was an association between diabetes and an increased risk of colorectal cancer, with a hazard ratio of 1.47. This association may have been greater among participants who did not undergo a colonoscopy screening and those with a history of smoking, with risk ratios of 2.07 and 1.62, respectively, perhaps due to differences in cancer screening; there may also have been a greater association among participants with recently diagnosed diabetes, perhaps due to recent participants undergoing cancer screening; and this association was perhaps even greater, with risk ratios of 2.07 and 1.62, respectively, perhaps due to differences in cancer screening; there was also perhaps a greater association among participants with recently diagnosed diabetes, perhaps due to the fact that the participants had recently been screened for cancer, and diabetes duration of less than 5 years vs. duration of 5-10 years: a risk ratio of 2.55.
The researchers suggest that increased interaction with the health care system after a diabetes diagnosis (including increased referrals for colorectal cancer screening) may be important to mitigate the detrimental effects of diabetes-related metabolic abnormalities in the body (especially early diabetes) on colorectal cancer risk. In summary, most of the participants in this study were from lower socioeconomic African American populations, and the researchers also found that having diabetes was associated with an increased risk of colorectal cancer, perhaps suggesting that prevention and control of diabetes reduces the disparity of colorectal cancer; whereas for patients who completed a colonoscopy, this association was perhaps attenuated, thus emphasizing how the adverse effects of diabetes-associated how the adverse effects of metabolic dysregulation can be confounded by preventive screening.
