Table 1

Patient characteristics of the 'test set' comprising 342 serum samples.

Diagnosis

n (%)

age

gender f/m

GPA

59 (17.3)

21 - 81

36/23

EGPA

40 (11.7)

21 - 70

20/20

MPA

20 (5.8)

17 - 80

13/7

SLE

40 (11.7)

20 - 72

31/9

RA

30 (8.8)

40 - 81

23/7

RA and rheumatoid vasculitis

10 (2.9)

44 - 67

5/5

Cryoglobulinaemic vasculitis

10 (2.9)

43 - 78

7/3

Systemic sclerosis

38 (11.1)

35 - 84

27/11

Infectious diseases

51 (14.9)

5 - 86

46/5

Healthy controls

44 (12.9)

23 - 71

28/16

Patients with GPA consist of cases with generalized and localized GPA demonstrating inactive as well as active disease. Patients with EGPA cover cases with active and inactive disease. EGPA, eosinophilic granulomatosis with polyangiitis (Churg-Strauss Syndrome); GPA, granulomatosis with polyangiitis (Wegener's); f, female; m, male; MPA, microscopic polyangiitis; RA, rheumatoid arthritis; SLE, systemic lupus erythematosus.

Knütter et al. Arthritis Research & Therapy 2012 14:R271   doi:10.1186/ar4119