Clinical characteristics at presentation and initial treatment of IgAV
| Male, % | 57.6 |
| Median age (IQR), years | 65.4 (41.3–77.4) |
| Purpura, # (%) | 139 (100) |
| necrotic, # (%) | 61 (43.9) |
| generalized, # (%) | 63 (45.3) |
| Joint involvement, # (%) | 62 (44.6) |
| GI tract involvement, # (%) | 49 (35.3) |
| severe GI, # (%) | 13 (9.4) |
| Renal involvement, # (%) | 69 (49.6) |
| severe, # (%) | 19 (13.7) |
| Median BVAS-3 (IQR) | 10 (5–16) |
| Malignancy, # (%) | 3 (2.2%) |
Legend: # – number of patients; IQR – interquartile range; GI – gastrointestinal tract; severe GI tract involvement- - bloody diarrhoea or ileus or surgical intervention; severe renal involvement – acute renal failure or nephrotic syndrome; BVAS-3 – Birmingham vasculitis activity score; Malignancy – concurrently diagnosed malignancy.