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Factors associated with inaccurate size estimation of colorectal polyps: A multicenter cross‐sectional study
Author(s) -
Utsumi Takahiro,
Horimatsu Takahiro,
Nishikawa Yoshitaka,
Teramoto Akira,
Hirata Daizen,
Iwatate Mineo,
Tanaka Shinwa,
Ikezawa Nobuaki,
Esaki Masaya,
Osera Shozo,
Ebisutani Chikara,
Agatsuma Nobukazu,
Saito Hiroaki,
Sano Yasushi,
Seno Hiroshi
Publication year - 2021
Publication title -
journal of gastroenterology and hepatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.214
H-Index - 130
eISSN - 1440-1746
pISSN - 0815-9319
DOI - 10.1111/jgh.15464
Subject(s) - medicine , confidence interval , odds ratio , colonoscopy , estimation , logistic regression , cross sectional study , portion size , colorectal polyp , sample size determination , statistics , colorectal cancer , pathology , cancer , mathematics , economics , chemistry , management , food science
Abstract Background and Aim Accurate polyp size estimation is essential in deciding the therapeutic strategy of colorectal polyps and endoscopic surveillance intervals. However, many endoscopists frequently make incorrect size estimations without being aware of their errors. This cross‐sectional study aimed to clarify the characteristics of endoscopists associated with inaccurate estimation. Methods We previously conducted a web trial involving 261 endoscopists in 51 institutions in Japan to assess their ability to estimate polyp size. Participants answered questions about polyp size using visual estimates in a test involving images of 30 polyps. Here, we investigated the relationships between inaccurate size estimation and the backgrounds of participants. The rates of overestimation and underestimation of polyp size were also compared to clarify any trends in the answers of participants with low accuracy (< 50%). Results Multivariable logistic regression analysis revealed that the number of colonoscopic procedures in the past year was the only factor associated with a low accuracy of polyp size estimation (odds ratio 0.750, 95% confidence interval 0.609–0.925; P = 0.007). Endoscopists with low accuracy had a greater tendency to overestimate polyp size (42.3% overestimation and 21.2% underestimation, P < 0.001) compared with other endoscopists (16.6% overestimation and 17.9% underestimation, P = 0.951). Conclusions Endoscopists with limited experience of colonoscopy in the past year were more likely to make frequent errors in size estimation. Furthermore, endoscopists making inaccurate size estimations had a propensity to overestimate polyp size.