Variation in polyp size estimation among endoscopists and impact on surveillance intervals - 17/09/14
Abstract |
Background |
Accurate estimation of polyp size is important because it is used to determine the surveillance interval after polypectomy.
Objective |
To evaluate the variation and accuracy in polyp size estimation among endoscopists and the impact on surveillance intervals after polypectomy.
Design |
Web-based survey.
Participants |
A total of 873 members of the American Society for Gastrointestinal Endoscopy.
Interventions |
Participants watched video recordings of 4 polypectomies and were asked to estimate the polyp sizes.
Main Outcome Measurements |
Proportion of participants with polyp size estimates within 20% of the correct measurement and the frequency of incorrect surveillance intervals based on inaccurate size estimates.
Results |
Polyp size estimates were within 20% of the correct value for 1362 (48%) of 2812 estimates (range 39%-59% for the 4 polyps). Polyp size was overestimated by >20% in 889 estimates (32%, range 15%-49%) and underestimated by >20% in 561 (20%, range 4%-46%) estimates. Incorrect surveillance intervals because of overestimation or underestimation occurred in 272 (10%) of the 2812 estimates (range 5%-14%). Participants in a private practice setting overestimated the size of 3 or of all 4 polyps by >20% more often than participants in an academic setting (difference = 7%; 95% confidence interval, 1%-11%).
Limitations |
Survey design with the use of video clips.
Conclusion |
Substantial overestimation and underestimation of polyp size occurs with visual estimation leading to incorrect surveillance intervals in 10% of cases. Our findings support routine use of measurement tools to improve polyp size estimates.
Le texte complet de cet article est disponible en PDF.Abbreviation : ASGE
Plan
| DISCLOSURE: All authors disclosed no financial relationships relevant to this publication. |
Vol 80 - N° 4
P. 652-659 - octobre 2014 Retour au numéro
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