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Gut and Liver 2010; 4(1): 36-42 https://doi.org/10.5009/gnl.2010.4.1.36 The Frequency and Risk Factors of Colorectal Adenoma in Health-Check-up Subjects in South Korea: Relationship to Abdominal Obesity and Age
Author Information
Ki-Seong Kim*, Hong Ju Moon*, Chang Hwan Choi, Eun Kyung Baek, Seung Young Lee, Bong Ki Cha, Hyun Woong Lee, Hyung Joon Kim, Jae Hyuk Do, and Sae Kyung Chang
Department of Internal Medicine, Chung-Ang University College of Medicine, Seoul, Korea

Chang Hwan Choi
© The Korean Society of Gastroenterology, the Korean Society of Gastrointestinal Endoscopy, the Korean Society of Neurogastroenterology and Motility, Korean College of Helicobacter and Upper Gastrointestinal Research, Korean Association the Study of Intestinal Diseases, the Korean Association for the Study of the Liver, Korean Pancreatobiliary Association, and Korean Society of Gastrointestinal Cancer. All rights reserved.

Abstract
Background/Aims: Obesity is associated with the risk of colorectal cancer. However, there is a lack of information about the relationship between obesity and colorectal adenoma. We investigated whether general and abdominal obesity are risk factors for colorectal adenoma. Methods: Subjects who received health check-ups, including colonoscopy, from April 2006 to September 2007 in Chung-Ang University Hospital were included (n=1,316). The frequency and characteristics of colorectal adenomas were analyzed according to demographic features, past history, blood tests, body mass index, and components of metabolic syndrome. Abdominal obesity was defined as a waist circumference of ≥80 cm in women and ≥90 cm in men. Results: The sex ratio of the subjects was 1.9：1 (male：female) and their age was 47.7±10.0 years (mean±SD). In univariate analysis, abdominal obesity was significantly associated with the frequency of colorectal adenoma (26.5% "yes" vs 16.9% "no"; p＜ 0.001). The frequency of colorectal adenoma was significantly higher among males, older patients, current smokers, and subjects with fasting hyperglycemia (≥100 mg/dL) or fatty liver (p＜0.05). Multivariate analysis identified that male sex (odds ratio [OR], 1.5; 95% confidence interval [CI], 1.0-2.2), old age (age ≥60 years; OR, 6.7; 95% CI, 3.5-12.5), and abdominal obesity (OR, 1.5; 95% CI, 1.0-2.2) were independent risk factors for colorectal adenoma (p＜0.05). The frequency of multiple adenomas (more than two sites) was also significantly higher in subjects with abdominal obesity. However, the effect of abdominal obesity on the development of colorectal adenoma decreased in elderly people. Conclusions: Abdominal obesity is an independent risk factor for colorectal adenoma and its multiplicity, especially in younger people in South Korea. (Gut Liver 2010;4:36-42)
Keywords: Abdominal obesity; Colorectal adenoma
Abstract
Background/Aims: Obesity is associated with the risk of colorectal cancer. However, there is a lack of information about the relationship between obesity and colorectal adenoma. We investigated whether general and abdominal obesity are risk factors for colorectal adenoma. Methods: Subjects who received health check-ups, including colonoscopy, from April 2006 to September 2007 in Chung-Ang University Hospital were included (n=1,316). The frequency and characteristics of colorectal adenomas were analyzed according to demographic features, past history, blood tests, body mass index, and components of metabolic syndrome. Abdominal obesity was defined as a waist circumference of ≥80 cm in women and ≥90 cm in men. Results: The sex ratio of the subjects was 1.9：1 (male：female) and their age was 47.7±10.0 years (mean±SD). In univariate analysis, abdominal obesity was significantly associated with the frequency of colorectal adenoma (26.5% "yes" vs 16.9% "no"; p＜ 0.001). The frequency of colorectal adenoma was significantly higher among males, older patients, current smokers, and subjects with fasting hyperglycemia (≥100 mg/dL) or fatty liver (p＜0.05). Multivariate analysis identified that male sex (odds ratio [OR], 1.5; 95% confidence interval [CI], 1.0-2.2), old age (age ≥60 years; OR, 6.7; 95% CI, 3.5-12.5), and abdominal obesity (OR, 1.5; 95% CI, 1.0-2.2) were independent risk factors for colorectal adenoma (p＜0.05). The frequency of multiple adenomas (more than two sites) was also significantly higher in subjects with abdominal obesity. However, the effect of abdominal obesity on the development of colorectal adenoma decreased in elderly people. Conclusions: Abdominal obesity is an independent risk factor for colorectal adenoma and its multiplicity, especially in younger people in South Korea. (Gut Liver 2010;4:36-42)
Keywords: Abdominal obesity; Colorectal adenoma
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