Article Text

Download PDFPDF
OC-056 The utility of measuring adenoma detection rate as a key performance indicator at diagnostic colonoscopy
  1. S Gupta1,
  2. A Murino2,
  3. K Abeysekera3,
  4. S Thomas-Gibson1
  1. 1The Wolfson Unit for Endoscopy, St Mark's Hospital and Academic Institute, London, UK
  2. 2Istituto di Clinica Medica, University of Sassari, Sassari, Italy
  3. 3Year 5 Medical Student, Imperial College School of Medicine, London, UK


Introduction Adenoma detection rate (ADR) is a key performance indicator for colonoscopy. Evidence suggests that various factors influence ADR. The BSG quality and safety indicators for endoscopy and the Global Rating Scale recommend ADR>10%.

Methods To assess how case mix affects ADR in a tertiary centre. We analysed 25 consecutive colonoscopies from each of the 15 non-trainee endoscopists at our institution. A further 50 cases each from six of the 15 endoscopists with low ADR, were assessed. Indications were divided into high (polyp follow-up, surveillance, familial cancer syndromes, rectal bleeding, anaemia) and low risk (IBD, diarrhoea, constipation, pain).

Results Six endoscopists had a median ADR of 8% (0–16%). The other nine had a median ADR of 28% (24–40%) with significantly more high-risk indications (p<0.0001). A further 50 cases from each of the six endoscopists with lower ADR were analysed. Median ADR was 12% (8–22%).

Conclusion In the 50 cases analysed for each of the six colonoscopists with low ADR, there were significantly more low risk cases (p<0.0001). The ADR was significantly lower for the low risk cases (2.6% vs 22.6%, p<0.0001). ADR should be measured as a key performance indicator in the context of indication for colonoscopy.

Abstract OC-056

ADR according to case indication for six endoscopists with median ADR12%

Statistics from

Request Permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.