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. 2021 Jul 22;4:114. doi: 10.1038/s41746-021-00486-5

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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 images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 2 — Forest plot of the mean difference in systolic blood pressure (SBP) within the experimental group. The top portion of this figure shows the mean difference (MD) in SBP at 6 mo within the intervention or control group for each study. Error bars for each study signify the 95% confidence intervals for the mean difference within the control group or intervention group for each study. The control groups for all studies were combined to create an estimated average effect in a random-effects model. A similar procedure was done for the intervention groups. The summary polygons at the bottom of the plot show results of random-effects models. Among all participants in the intervention group, there was a statistically significant decrease in the mean difference for SBP change. However, this mean difference estimate was not significantly different from the estimate from the control group (test for experimental group difference: p = 0.48).