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학술저널
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대한소화기내시경학회 Clinical Endoscopy Clinical Endoscopy 제47권 제1호
발행연도
2014.1
수록면
74 - 78 (5page)

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Background/Aims: Recent studies have demonstrated that magnifying endoscopy with narrow band imaging (ME-NBI) facilitates differentiation of early gastric cancer from gastric adenoma using vessel plus surface (VS) classification. This study estimated the interobserver and intraobserver agreement of endoscopists using the Yao VS classification system for the gastric mucosal surface. Methods: We retrospectively reviewed patients who underwent endoscopic submucosal dissection or endoscopic mucosal resection, and selected cases in which preoperative ME-NBI was conducted. Before testing endoscopists, a 20-minute training module was given. Static ME-NBI images (n= 47 cases) were presented to seven endoscopists (two experts and five trainees) who were asked to assess the images in 20 seconds using the Yao VS classification system. After 2 weeks, the endoscopists were asked to analyze the images again. The κ statistic was calculated for intraobserver and interobserver variability. Results: The mean κ for intraobserver agreement was 0.69 (experts, 0.74; trainees, 0.64). The mean κ for interobserver agreement was 0.42 (experts, 0.49; trainees, 0.40). Conclusions: We obtained reliable results as assessed by observer variability, with only brief training on VS classification. The VS classification appears to provide an objective assessment of ME-NBI for trainees who are not familiar with ME-NBI.

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