Fig. 3

Relation of PWA and duplex parameter differences between the fistula and non-fistula arm. Scatterplots of ∆A2 (panel a and b) and ∆m2 (panel c and d) in relation to ∆Vmax (panel a and c) and to ∆Vdiast (panel b and d); in case of significant correlation, regression lines are added and the regression coefficient r and p-value are presented in the bottom of the respective panel