Fig. 7.

Blood levels of selected proteins in granulomatosis with polyangiitis patients (active GPA n = 26, remission of GPA n = 29) and healthy controls (n = 31). (a) Serum levels of selected proteins in patients, data presented as median with interquartile range, differences tested with the use of Kruskal–Wallis non‐parametric analysis of variance (anova) with Dunn’s post‐hoc test; (b) correlation between serum levels of ST2 or DKK1 and disease activity score (BVAS) in patients with active GPA, Spearman’s rank correlation.