Table 1. Demographic data for the AASV patients and controls.
| Variable | GPA | MPA | HBD | PV | TP | SLE | RA |
| N | 31 | 13 | 93 | 17 | 20 | 21 | 21 |
| Age years; | 61 | 64 | 41 | 61 | 51 | 44 | 63 |
| median (range) | (18–86) | (37–87) | (21–68) | (37–81) | (29–71) | (22–68) | (32–86) |
| F/M ratio | 15/16 | 7/6 | 36/57 | 7/10 | 7/13 | 20/1 | 13/8 |
| PR3-ANCA | 26 | 1 | - | - | - | - | - |
| MPO-ANCA | 3 | 12 | - | - | - | - | - |
| ANCA negative | 2 | 0 | - | - | - | - | - |
| BVAS 0–1 | 23 | 8 | - | - | - | - | - |
| BVAS 2–5 | 6 | 5 | - | - | - | - | - |
| BVAS>5 | 2 | 0 | - | - | - | - | - |
| DAS; median (IQR) | - | - | - | - | - | - | 3.96 (3.1–4.5) |
| SLEDAI; median (IQR) | - | - | - | - | - | 4 (0–8) | - |
| Prednisolone dose mg/day; median (IQR) | 1.25 (0–5) | 5 (0–7.5) | - | - | 5 (5–7.5) | 7 (5–10) | 2.5 (0–5) |
AASV = ANCA-associated Systemic Vasculitis. GPA = Granulomatosis with polyangiitis. MPA = Microscopic polyangiitis. N = Number of subjects. F = Female. M = Male. HBD = healthy blood donors. PV = Polycythemia Vera. TP = renal transplant recipients. SLE = Systemic Lupus Erythematosus. RA = Rheumatoid Arthritis. BVAS = Birmingham Vasculitis Activity Score. DAS = Disease activity score. SLEDAI = SLE disease activity index. IQR = Interquartile range.