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KMID : 1188320090030010035
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Gut and Liver
2009 Volume.3 No. 1 p.35 ~ p.40
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Colorectal Neoplasm in Asymptomatic Average-risk Koreans: The KASID Prospective Multicenter Colonoscopy Survey
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Park Hye-Won
Byeon Jeong-Sik
Yang Suk-Kyun
Kim Hyun-Soo
Kim Won-Ho
Kim Tae-Il
Park Dong-Il
Kim Young-Ho
Kim Hyo-Jong
Lee Moon-Sung
Chung Il-Kwon
Jung Sung-Ae
Jeen Yoon-Tae
Choi Jai-Hyun
Choi Hwang
Choi Kyu-Yong
Han Dong-Soo
Song Jae-Suk
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Abstract
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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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KEYWORD
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Prevalence, Colonoscopy, Colorectal neoplasms, Korea, Mass screening
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