Colorectal neoplasm in asymptomatic average-Risk Koreans: The KASID prospective multicenter colonoscopy survey

Hye Won Park, Jeong Sik Byeon, Suk Kyun Yang, Hyun Soo Kim, Won Ho Kim, Kim Tae, Dong Park, Young Ho Kim, Hyo Jong Kim, Moon Sung Lee, Kwon Chung, Sung Ae Jung, Yoon Tae Jeen, Jai Hyun Choi, Hwang Choi, Kyu Yong Choi, Dong Soo Han, Jae Suk Song

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)


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. (Gut and Liver 2009;3:35-40).

Original languageEnglish
Pages (from-to)35-40
Number of pages6
JournalGut and liver
Issue number1
Publication statusPublished - 2009 Mar
Externally publishedYes


  • Colonoscopy
  • Colorectal neoplasms
  • Korea
  • Mass screening
  • Prevalence

ASJC Scopus subject areas

  • Hepatology
  • Gastroenterology


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