Gut Liver.
2009 Mar;3(1):35-40.
Colorectal Neoplasm in Asymptomatic Average-risk Koreans: The KASID Prospective Multicenter Colonoscopy Survey
- Affiliations
-
- 1Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea. jsbyeon@amc.seoul.kr
- 2Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea.
- 3Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.
- 4Department of Internal Medicine, Sungkyunkwan University College of Medicine, Seoul, Korea.
- 5Department of Internal Medicine, Kyunghee University College of Medicine, Seoul, Korea.
- 6Department of Internal Medicine, Soonchunhyang University College of Medicine, Bucheon and Cheonan, Korea.
- 7Department of Internal Medicine, Ewha Woman's University College of Medicine, Seoul, Korea.
- 8Department of Internal Medicine, Korea University College of Medicine, Seoul and Ansan, Korea.
- 9Department of Internal Medicine, The Catholic University College of Medicine, Incheon, Korea.
- 10Department of Internal Medicine, Hanyang University College of Medicine, Guri, Korea.
- 11Department of Preventive Medicine, Kwandong University College of Medicine, Gangneung, Korea.
Abstract
- BACKGROUND/AIMS
The incidence of colorectal cancer is increasing in Korea, but the epidemiology of colorectal neoplasm is not clearly defined. We aimed to elucidate the prevalence of colorectal neoplasm in average-risk Koreans and explore the underlying risk factors.
METHODS
A large-scale, multicenter, prospective study was conducted. Of the 19,460 subjects who underwent colonoscopy at 11 university hospitals, we analyzed 3,951 consecutive asymptomatic adults with no risk factors for colorectal cancer.
RESULTS
The subjects were aged 52.1+/-11.6 years (mean+/-SD) and 60.1% of them were men. The prevalences of colorectal neoplasm and advanced neoplasm were 33.3% and 2.2%, respectively. The prevalence of a neoplasm increased with age (trend: p<0.001) and was higher in males (p<0.001). The prevalence of a proximal neoplasm was higher in subjects with a distal neoplasm than in those without a distal neoplasm (11.9% vs. 5.4%, p<0.001). However, 150 (52.1%) of the 288 subjects with a proximal neoplasm had no distal neoplasm.
CONCLUSIONS
The overall prevalence of colorectal neoplasm in asymptomatic average-risk Koreans is comparable with that in Western countries. Being male and older are associated with a higher risk of colorectal neoplasm. Over half of proximal neoplasms are not associated with any distal sentinel lesions.
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