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首页> 外文期刊>Archives of Iranian medicine >Inter- and intra-observer variability of the Los Angeles classification: a reassessment.
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Inter- and intra-observer variability of the Los Angeles classification: a reassessment.

机译：洛杉矶分类的观察者之间和观察者内部变异：重新评估。

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BACKGROUND: Los Angeles classification is widely adopted for reporting endoscopic gastroesophageal reflux disease. We assessed the inter- and intra-observer variability of the Los Angeles classification. METHODS: Still images (n = 254) of the lower esophagus were presented to 9 gastroenterologists (6 experts and 3 trainees) and they were asked to report the images according to the Los Angeles classification. After 2 weeks the images were reordered and they were asked to report them again. Kappa statistic was calculated for intra- and inter-observer variability. RESULTS: The kappa for intra-observer agreement was 0.54 (attendings: 0.54; trainees; 0.55; P = not significant) and the inter-observer agreement was 0.22 (attendings: 0.20; trainees: 0.31; P = 0.027). The inter- and intra-observer kappa values in differentiating nonerosive from erosive cases were 0.22 (attendings: 0.21; trainees: 0.31, P = not significant) and 0.57 (attendings: 0.58; trainees: 0.55, P = not significant), respectively. CONCLUSION: According to our data, the Los Angeles classification has acceptable intra-observer variability, both for detecting presence or absence of erosions and for differentiating between different degrees of esophagitis, while its inter-observer performance seems to be less acceptable. It may be reasonable and timely to have another look at the Los Angeles classification to see whether its performance can be improved even further.
机译：背景：洛杉矶分类被广泛用于报告内镜胃食管反流病。我们评估了洛杉矶分类的观察者之间和观察者内部的变异性。方法：将下食道的静止图像（n = 254）提供给9位肠胃病学家（6位专家和3位受训者），并要求他们根据洛杉矶分类报告图像。 2周后，将图像重新排序，并要求它们再次报告。计算了观察者内和观察者间差异的Kappa统计量。结果：观察员内部协议的kappa为0.54（出席者：0.54;受训者; 0.55; P =不重要），观察者间协议的kappa为0.22（出席者：0.20;受训者：0.31; P = 0.027）。区分非侵蚀性和侵蚀性病例的观察者间和观察者内部kappa值分别为0.22（出席：0.21;受训者：0.31，P =不显着）和0.57（出席：0.58;受训者：0.55，P =不重要）。结论：根据我们的数据，Los Angeles分类法在观察者内部变异性方面可以接受，既可用于检测侵蚀的存在与否，也可以用于区分不同程度的食道炎，而其观察者之间的表现似乎较不可接受。再次查看洛杉矶分类，以查看其性能是否可以进一步提高，可能是合理且及时的。

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