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. 2019 Oct 29;8:92. doi: 10.1186/s40249-019-0602-0

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© The Author(s). 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 3 — Number needed to screen, incidence rate ratios and 95% confidence intervals for high-risk populations in Yunnan, 2013–2015 NNS: Number needed to screen to detect one tuberculosis case. IRRs: Incidence rate ratio of high-risk population compared to general population in active case finding strategy; CI: confidence intervals. High-risk groups: Elderly, Diabetes mellitus, HIV/AIDS, close contact and history of previous tuberculosis case. *Log transformed with X-axis