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. 2021 Jun 28;11:13411. doi: 10.1038/s41598-021-92712-z

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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 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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Impact of age and systolic blood pressure on the skin’s perfusion relative capillary capacity and vessel diameter. (a) The cohort analysis shows significant differences in RCC values and (b) vessel diameter in relation to age and systolic blood pressure. 2 RH-OCT-A images per subject (young: n = 13; old: n = 12; SBP < 130: n = 15; SBP ≥ 130: n = 10). (c) The scatterplot shows a significant correlation between age and the RCC metric (R² = 0.2, p < 0.01) and (d) systolic blood pressure and RCC values (R² = 0.39, p < 0.001). R² is the square of the Pearson correlation coefficient. 2 RH-OCT-A images (inner and outer forearm) were obtained per subject (n = 25).