Table 2 Clinical characteristics of patients at relapse.

Parameters at relapse	Patients with relapse (n = 52)
C‐ANCA titre (IIF)	1/320
CRP (mg/l)†	50.8 (53)
Creatinine (μmol/l)*	118 (71–1243)
BVAS*	12.5 (3–24)
Organ involvement‡
ENT	34 (65)
Lung	5 (10)
Kidney	33 (63)

BVAS, Birmingham Vasculitis Activity Score; C‐ANCA, cytoplasmic antineutrophil cytoplasmic antibodies; CRP, C reactive protein; ENT, ear nose throat; IIF, indirect immunofluorescence assay.

*Values are median (range).

†Mean (SD).

‡Values are n (%).