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Intest Res > Volume 9(2); 2011 > Article
Intestinal Research 2011;9(2):105-111.
DOI:    Published online August 30, 2011.
Usefulness of Polyp Detection Rate as a Quality Indicator in Colonoscopy
Su Hee Lee, Dong Il Park, Jun Mo Sung, Jae Hyun Jang, Seung Ho Ryu2, Young Ho Kim2, Suck-Ho Lee3, Chang Kyun Lee4, Chang Soo Eun5, Dong Soo Han5
1Department of Internal Medicine, and Occupational Medicine
2Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Department of Internal Medicine, Samsung Medical Center
3Sungkyunkwan University School of Medicine, Seoul, Soonchunhyang University College of Medicine
4Cheonan, Kyung Hee Univeristy College of Medicine
5Seoul, Hanyang University College of Medicine, Guri, Korea
대장 내시경의 질 관리 지표로 용종 발견율의 유용성
이수희, 박동일, 성준모, 장재현, 유승호2, 김영호2, 이석호3, 이창균4, 은창수5, 한동수5
1성균관대학교 의과대학 강북삼성병원 내과학교실, 산업의학과교실
2삼성서울병원 내과
3순천향대학교 의과대학 내과학교실
4경희대학교 의과대학 내과학교실
5한양대학교 의과대학 내과학교실
The adenoma detection rate (ADR) has been proposed as a quality indicator of colonoscopy; however, ADR cannot be measured easily with commonly used endoscopy reporting systems because substantial time and effort is required to acquire data from histologic assessments. The purpose of this study was to determine if polyp detection rate (PDR) could be used as a valid proxy for ADR. Methods: A total of 1,156 consecutive, asymptomatic, individuals of average risk between 50 and 75 years-of-age who underwent screening colonoscopies at four tertiary medical centers by 27 gastroenterologists were included in this study. Each individual endoscopist performed at least 10 colonoscopies during the study period. The ADR and PDR were calculated as the proportion of an endoscopist's cases with an adenoma or polyp divided by the total number of colonoscopies. Pearson's correlation coefficient and the intraclass correlation coefficient were used to determine the level of agreement between ADR and PDR. Results: The mean PDR and ADR for endoscopists was 47.4% (range, 21.7-75.0) and 36.5% (range, 13.0-66.7), respectively. There was a strong correlation between PDR and ADR (Pearson's correlation coefficient 0.94, P<0.001) and there was also good agreement between performance quintiles defined by ADR and PDR (intraclass correlation coefficient 0.94, P<0.001). Conclusions: PDR is a valid proxy for ADR and may be useful for quality assurance at centers where ADR cannot be easily measured. (Intest Res 2011;9:105-111)
Key Words: Polyp Detection Rate, Adenoma Detection Rate, Colonoscopy
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