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J Yeungnam Med Sci > Volume 33(1); 2016 > Article
Yeungnam University Journal of Medicine 2016;33(1):13-20.
DOI:    Published online June 30, 2016.
High levels of carcinoembryonic antigen and smoking might be markers of colorectal adenoma in Korean males aged 40-49 years.
In Cheol Yoon, Jeong Hyeon Cho, Heejin Choi, Young Hoon Choi, Kyu Min Lim, Sung Hwa Choi, Jae Ho Han, Hyeon Ju Jeong, Hong Sub Lee
Department of Internal Medicine, Myongji Hospital, Seonam University College of Medicine, Goyang, Korea.
BACKGROUND: Prevalence of adenoma in males aged 40-49 years in Korea was higher than expected. The aim of this study was to investigate the prevalence and risk factors of colorectal adenoma in males aged 40-49 years. METHODS: Total 1,902 asymptomatic subjects with a mean age of 47.9±6.7 years, who underwent a screening colonoscopy in a health promotion center of Myongji Hospital from 2010 to 2013 were enrolled in this study. We conducted a case-control study to determine the risk factors for adenoma. The subjects were classified into two groups (adenoma vs. controls). To validate the diagnostic value of carcinoembryonic antigen (CEA) for adenoma, area under the receiver operating characteristic curve (AUROC) was calculated. RESULTS: At least one colorectal adenoma was identified in 385 subjects (20.2%). Among these 385 subjects, 372 subjects were found to have a non-advanced adenoma, 13 subjects had an invasive adenoma. One subject had cancer. Male sex, age, smoking, metabolic syndrome, and elevated CEA level were significantly associated with a colorectal adenoma in univariate analysis. However, metabolic syndrome was not significant in multivariate analysis. In the male group, the AUROC of CEA for colorectal adenoma was 0.600 (0.543 to 0.656) in non-smokers under 50 years of age, and 0.615 (0.540 to 0.690) in smokers under 50 years of age. CONCLUSION: Male sex, smoking, and high levels of CEA seem to be associated with colorectal adenoma. High levels of CEA and smoking may be diagnostic markers for any colorectal adenoma in Korean males aged 40-49 years.
Key Words: Carcinoembryonic antigen, Colorectal adenoma, Colonoscopy, Risk factors, Smoking


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