Interobserver and intra-observer consistency in the endoscopic assessment of colonic pit patterns

Qiyang Huang, Norio Fukami, Hiroshi Kashida, Tsukasa Takeuchi, Etsuko Kogure, Toshinori Kurahashi, Etienne Stahl, Yui Kudo, Hiroyuki Kimata, Shin Ei Kudo

Research output: Contribution to journalArticlepeer-review

80 Scopus citations


Background: The colonic pit pattern is recognized as an aid to the differential diagnosis between hyperplastic lesions, adenoma, and carcinoma, and is a focus for observation by magnification chromoendoscopy, especially in Japan. This study evaluated intra- and interobserver agreement of experienced endoscopists in the assessment of colonic pit patterns when using the Kudo classification. Methods: A total of 220 magnification chromoendoscopic pictures of colonic lesions were selected, of which 215 were collected from a consecutive series of patients. The pictures were randomly displayed twice to 6 experienced endoscopists at an interval of 1 week. Each picture was assessed for predominant pit pattern by using the classification of Kudo. Histopathologic diagnosis also was predicted based on the pit pattern diagnosis. Kappa statistics were used to estimate intra- and interobserver variation. Results: The mean (standard deviation) inter- and intra-observer kappa values for experienced endoscopists were 0.716 (0.031) and 0.810 (0.084), respectively. For prediction of histopathology according to the pit pattern diagnosis, the mean (standard deviation) inter- and intra-observer kappa values were 0.776 (0.032) (p = 0.001) and 0.862 (0.069) (p = 0.028), respectively. Conclusions: For experienced endoscopists, the inter- and intra-observer reproducibility of the classification of colonic pit pattern is good.

Original languageEnglish (US)
Pages (from-to)520-526
Number of pages7
JournalGastrointestinal endoscopy
Issue number4
StatePublished - Oct 2004

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Gastroenterology


Dive into the research topics of 'Interobserver and intra-observer consistency in the endoscopic assessment of colonic pit patterns'. Together they form a unique fingerprint.

Cite this