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85, positivity rate RR = 1.14; P less then .0001). CONCLUSIONS Determining concordance of testing and positivity rate of a laboratory test can be used for assessing testing appropriateness for other diseases in other jurisdictions. This study demonstrated some at-risk patients may be missed for H pylori testing. © American Society for Clinical Pathology, 2020. All rights reserved. For permissions, please e-mail [email protected] Classification of images is an essential task in higher-level analysis