Clinical features and laboratory information of the participants who contributed plasma. Values are n unless otherwise specified.
| Characteristics | sJIA, n = 40 | pJIA, n = 25 | oJIA, n = 40 | JAS, n = 30 | SLE, n = 25 | KD, n = 40 | HSP, n = 40 | HC, n = 40 |
|---|---|---|---|---|---|---|---|---|
| Age, yrs, mean ± SD | 6.98 ± 3.0 | 6.56 ± 4.1 | 6.59 ± 3.5 | 11.13 ± 2.7 | 11.24 ± 3.2 | 2.09 ± 1.4 | 7.48 ± 3.1 | 4.18 ± 1.51 |
| Female | 22 | 17 | 20 | 4 | 17 | 15 | 13 | 19 |
| WBC > 10 × 109 | 25 | 4 | 13 | 7 | 6 | 32 | 16 | |
| HB < 120 g/l | 33 | 14 | 18 | 8 | 12 | 35 | 11 | |
| PLT > 300 × 109 | 31 | 21 | 26 | 15 | 6 | 25 | 20 | |
| N > 6.5 × 109 | 23 | 3 | 3 | 5 | 4 | 28 | 11 | |
| M > 0.8 × 109 | 12 | 4 | 2 | 6 | 2 | 17 | 6 | |
| Fe < 9 μmol/l | 32 | 14 | 21 | 22 | 8 | 29 | 6 | |
| CRP > 8.0 mg/l | 37 | 11 | 17 | 14 | 7 | 36 | 11 | |
| ESR > 20 mm/h | 34 | 10 | 16 | 18 | 19 | 37 | 10 | |
| ANCA | 0 | 1, suspected positive | 7 | 0 | 1 | — | — | |
| Anti-CCP/APF/AKA | 1 | 6 | 4 | 0 | 0 | — | — | |
| HLA-B27+ | 0 | 0 | 0 | 25 | — | — | — |
JIA: juvenile idiopathic arthritis; sJIA: systemic JIA; pJIA: polyarticular JIA; oJIA: oligoarticular JIA; JAS: juvenile ankylosing spondylitis; SLE: systemic lupus erythematosus; KD: Kawasaki disease; HSP: Henoch-Schönlein purpura; HC: healthy controls; WBC: white blood cell count; HB: hemoglobin; PLT: platelet count; N: neutrophil count; M: monoctye count; Fe: ferrum; CRP: C-reactive protein; ESR: erythrocyte sedimentation rate; ANCA: antineutrophil cytoplasmic antibodies; anti-CCP: anticyclic citrullinated peptide antibodies; APF: antiperinuclear factor; AKA: antikeratin antibody.