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. 2019 Jun 10;19:162. doi: 10.1186/s12877-019-1176-1

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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. 1 — A mediation model of hypothesis. X for predictor (community-based BP monitoring), M1, M2 for mediators (hypertension treatment and lifestyle behaviors) and Y for outcome (hypertension control). M1 and M2 are considered as mediators to the extent to which it carries the influence of a given independent variable (X) to a given dependent variable (Y). a1, a2, b1, b2 for indirect effects, c for direct effect