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Endoscopic findings have been used to support a diagnosis of eosinophilic esophagitis (EoE) and to assess response to therapy, but their reliability is unknown. The aim of the study was to assess inter- and intraobserver reliability of endoscopic findings with white-light endoscopy and to assess changes in interobserver reliability when narrow band imaging (NBI) was added to white light.

We collected data from 35 academic and 42 community adult gastroenterologists using 2 self-administered, online assessments of endoscopic images in patients with suspected EoE. First, gastroenterologists evaluated 35 single white light images. Next, they examined 35 paired images of the initial white light image and its NBI counterpart. To assess intraobserver reliability, a second survey to re-examine the single white light images was performed ≥2 weeks later. Agreement was determined by …