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. 2018 Jul 7;24(25):2764–2775. doi: 10.3748/wjg.v24.i25.2764

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©The Author(s) 2018. Published by Baishideng Publishing Group Inc. All rights reserved.

This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial.

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Relationship between the estimated Mycobacterium tuberculosis infection risk difference and the corresponding standard error of the estimate. Risk difference was calculated after arcsine transformation of Mycobacterium tuberculosis incidence (Arcus sinus difference, ASD). The dashed vertical line indicates the overall arcsine difference found, and the diagonal lines indicate the expected 95% confidence intervals associated with the expected mean ASD for clinical trials with various numbers of study subjects.