Original articleClinical endoscopyDifferences in proximal serrated polyp detection among endoscopists are associated with variability in withdrawal time
Section snippets
Study population
Data were collected in the randomized, multicenter Colonoscopy or Colonography for Screening (COCOS) trial. The overall design of this invitational, population-based, colorectal cancer screening program as well as its main results (participation and diagnostic yield) have been described in detail elsewhere.12, 13 Screening participants allocated to the colonoscopy arm were included for this study. Between June 2009 and July 2010, a total of 6600 asymptomatic individuals from the Amsterdam and
Results
A total of 1426 people participated in the colonoscopy screening program, of whom 1407 (99%) underwent a complete screening colonoscopy. In this group, 1354 colonoscopies were completed by endoscopists who had performed more than 50 colonoscopies. Of the corresponding study participants, 689 (51%) were men; their median age was 60 years (interquartile range [IQR] 55-65 years). The median Ottawa bowel preparation score was 5 (IQR 3-8). The median net withdrawal time was 10 minutes (IQR 8-15
Discussion
We performed a prospective study to compare PSP detection among endoscopists and to identify patient-related and procedure-related factors associated with the detection of PSPs. PSP detection differed significantly among experienced endoscopists. In this population, we did not observe significant effects of age, sex, or quality of bowel preparation but found withdrawal time to be strongly and significantly associated with PSP detection.
To our knowledge, this is the first prospective study to
Acknowledgment
We would like to acknowledge Karin de Groot for the professional research support and the accurate recording of all colonoscopy items.
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Withdrawal Time: Is Nine the New Six?
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DISCLOSURE: The study was funded by The Netherlands Organization for Health Research and Development of the Dutch Ministry of Health (ZonMW 120720012) and by the Center for Translational Molecular Medicine (CTMM DeCoDe-project). Norgine (Amsterdam, The Netherlands) provided the bowel preparation for colonoscopy. No other financial relationships relevant to this publication were disclosed.
See CME section; p. 636.
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