Table 1.
Baseline demographic and clinical characteristics of the patients.
| Characteristic | JIA (n = 44) |
Other Types of Arthritis (n = 23) |
Control (n = 44) |
|---|---|---|---|
| Age, years | 8.9 ± 4.5 | 11.9 ± 4.5 | 10.8 ± 3.9 |
| Age, years (median) | 8 | 13 | 12 |
| Sex, female (%) | 31 (70%) | 14 (61%) | 29 (66%) |
| JIA type, n (%) | |||
| Oligoarthritis | 21 (48%) | - | - |
| Polyarthritis RF+ Polyarthritis RF− |
2 (4%) 13 (930%) |
- - |
- - |
| ERA Psoriatic arthritis |
7 (16%) 1 (2%) |
- - |
- - |
| WBC (×103/µL) | 8.4 ± 2.7 | 8.3 ± 2.5 | 6.6 ± 1.8 |
| RBC (×106/µL) | 4.7 ± 0.3 | 4.6 ± 0.5 | 4.6 ± 0.3 |
| HGB (g/dL) | 12.6 ± 1.2 | 13.0 ± 1.6 | 13.2 ± 1.1 |
| PLT (×103/µL) | 355 ± 130 | 313 ± 88 | 284 ± 70 |
| CRP (mg/dL) | 0.54 ± 1.15 | 2.19 ± 2.88 | 0.12 ± 0.31 |
| ESR (mm/h) | 29.8 ± 25.1 | 31.6 ± 29.6 | 7.4 ± 7.6 |
| LAS | 5.6 ± 6.5 | 1.7 ± 1.3 | 0 ± 0 |
| LORS | 2.9 ± 5.3 | 0.74 ± 1.0 | 0 ± 0 |
| VAS Ph (cm) | 5.2 ± 2.1 | ND | ND |
| VAS P (cm) | 5.7 ± 2.1 | ND | ND |
| CHAQ | 0.85 ± 5.60 | ND | ND |
Values are shown as means ± standard deviation, unless stated otherwise. JIA, juvenile idiopathic arthritis; ERA, enthesitis-related arthritis; RF+—rheumatoid factor positive; RF−—rheumatoid factor negative, WBC, white blood cells; RBC, red blood cells; HGB, hemoglobin; PLT, platelet count; CRP, C-reactive protein; ESR, erythrocyte sedimentation rate; AJC, Active joint count; ROM—joints with limited range of motion; VAS Ph, physician global assessment of disease activity (0–10 cm visual analog scale); VAS P, parent/patient assessment of overall well-being (0–10 cm VAS); CHAQ, Childhood Health Assessment Questionnaire; ND, not determined.