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. 2023 Jul 28;26(4):547–563. doi: 10.1007/s10456-023-09885-6

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© The Author(s) 2023, corrected publication 2023

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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Fig. 1 — Flicker induced dilation and static retinal vessel analysis in PCS patients and HC control. a Boxplots show arteriolar dilatation (aFID) and venular dilation (vFID) (a and b) and SVA parameters CRAE, CRVE and AVR (c, d and e) in PCS patients (red) and SARS-CoV-2 naïve participants (beige). For RVA parameters boxplots represents data of n = 39 PCS patients and n = 39–40 SARS-CoV-2 naïve participants and for SVA parameters data of n = 41 PCS patients and n= 40 SARS-CoV-2 naïve participants. Mean values are shown as a rectangle and median values as a line. Wilcoxon rank sum test (skewed distributions) or Welch´s t test (normal distribution) were used to compare groups. f ROC curves show discrimination between PCS patients and infection naïve participants for AVR, vFID and CRAE. g ROC curve shows discrimination between PCS patients and infection naïve participants for AVR and vFID combined. AUC is presented with 95% confidence intervals (CI) calculated with DeLong´s method.