 A prospective study was conducted encompassing EGC patients cases and non-EGC patients controls. All patients were performed endoscopic examination and systematically biopsied. Outcome measures were assessed and compared, including EGA classification as well as the OLGAOLGIM assessment. Helicobacter pyloriH. pylori status was detected in the meantime. A stepwise logistic regression model was performed to analyze correlations between EGA, OLGA, OLGIM and EGC. 