Fig. 1

Changes in endothelial function assessed by flow-mediated dilation (FMD) and reactive hyperemia peripheral artery tonometry (RH-PAT) in abstainers (n = 58). Spearman’s rank correlation coefficient between the changes in FMD and a natural logarithmic transformation of the RH index (Ln-RHI) is −0.004 (p = 0.977)