a ≥1 clinical relapses during follow-up.bChi square (categoric variables) or ANOVA (continuous
variables). NS: not significant. Anti-MPO: anti-myeloperoxidase.
Anti-PR3: anti-proteinase-3. MPA: microscopic polyangiitis. GPA:
granulomatosis with polyangiitis. EGPA: eosinophilic granulomatosis with
polyangiitis. ESRD: end-stage renal disease. IQR: interquartile range.
ENT: ear, nose, throat. CNS: central nervous system.