Accuracy and interrater reliability for the diagnosis of Barrett’s neoplasia among users of a novel, portable high-resolution microendoscope

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The high-resolution microendoscope (HRME) is a novel imaging modality that may be useful in the surveillance of Barrett’s esophagus in low-resource or community-based settings. In order to assess accuracy and interrater reliability of microendoscopists in identifying Barrett’s-associated neoplasia using HRME images, we recruited 20 gastroenterologists with no microendoscopic experience and three expert microendoscopists in a large academic hospital in New York City to interpret HRME images. They prospectively reviewed 40 HRME images from 28 consecutive patients undergoing surveillance for metaplasia and low-grade dysplasia and/or evaluation for high-grade dysplasia or cancer. Images were reviewed in a blinded fashion, after a 4-minute training with 11 representative images. All imaged sites were biopsied and interpreted by an expert pathologist. Sensitivity of all endoscopists for identification of high-grade dysplasia or cancer was 0.90 (95% confidence interval [CI]: 0.88-0.92) and specificity was 0.82 (95% CI: 0.79-0.85). Positive and negative predictive values were 0.72 (95% CI: 0.68-0.77) and 0.94 (95% CI: 0.92-0.96), respectively. No significant differences in accuracy were observed between experts and novices (0.90 vs. 0.84). The kappa statistic for all raters was 0.56 (95% CI: 0.54-0.58), and the difference between groups was not significant (0.64 vs. 0.55). These data suggest that gastroenterologists can diagnose Barrett’s-related neoplasia on HRME images with high sensitivity and specificity, without the aid of prior microendoscopy experience.

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Vila, P.M., Kingsley, M.J., Polydorides, A.D., et al.. "Accuracy and interrater reliability for the diagnosis of Barrett’s neoplasia among users of a novel, portable high-resolution microendoscope." Disease of the Esophagus, 27, no. 1 (2014) Oxford University Press: 55-62. https://doi.org/10.1111/dote.12040.

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This is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by Wiley Periodicals, Inc. and the International Society for Diseases of the Esophagus.
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