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. 2021 Nov 23;11:22767. doi: 10.1038/s41598-021-01358-4

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© The Author(s) 2021

Open AccessThis 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.

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Agreement between the reference BP values from the sphygmomanometer cuff and the estimated BP values using PAT estimates and the inverse squared model. The left panel shows the results for SBP estimation, the right panel shows the results for DBP estimation. (a,e) The Bland–Altman plots shows no underlying bias. (b,f) The differences between the reference and estimated BP values. (c,g) The distribution of the mean values show that the BP values are within the expected physiological range. (d,h) The correlation is high, with an r of 0.93 for SBP and 0.92 for DBP.