Abdominal fat distribution measured using computed tomography is associated with an increased risk of colorectal adenoma in men

Il-Kook Seo, Beom Jin Kim, Bomin Kim, Chang Hwan Choi, Jeong Wook Kim, Jae Gyu Kim, Se Kyung Chang, Hyun Kang
Medicine (Baltimore) 2017, 96 (37): e8051
A few studies have shown inconsistent results regarding the association between the visceral fat proportion and colorectal adenomas. We aimed to investigate the association between abdominal fat distribution measured by computed tomography (CT) and colon adenoma.A total of 336 participants underwent physical examination, blood tests, colonoscopy, and abdominal computed tomography at Chung-Ang University Hospital. The associations between the obesity indicies (body mass index, visceral fat area (VFA), subcutaneous fat area (SFA), VFA-to-SFA ratio (VFA/SFA), and colorectal adenomas were evaluated.Of 309 subjects, 119 patients (38.5%) had colorectal adenoma. Mean age and fasting plasma glucose were higher in the patients with colorectal adenoma (P < .05, respectively). The mean VFA (153.3 cm vs 131.4 cm, P < .01) and VFA/SFA (1.07 vs 0.92, P < .05) were higher in the adenoma group than in the nonadenoma group. Males had higher mean VFA and VFA/SFA (P < .001). The mean VFA, SFA, and VFA/SFA were not associated with the location, size, number, and advancement of colorectal adenoma. In multivariate analysis, colorectal adenoma was significantly associated with VFA rather than VFA/SFA. In addition, colorectal adenoma was significantly associated with VFA rather than VFA/SFA in the men. The VFA, SFA, and VFA/SFA were not associated with colorectal adenoma in the women.The VFA measured by using a CT scan was positively associated with the presence of colorectal adenoma, especially in men. Furthermore, average risk men with large visceral fat volume should be examined carefully in screening colonoscopy.

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