Table 2.
Comparison between Dry Synovitis and RF-negative polyarticular JIA
| Clinical Features | Dry arthritis (no.12) |
Poly JIA (no.35) |
Significance | |
|---|---|---|---|---|
| Sex (female) | 8 (66.7%) | 33 (94.3%) | 0.03 | |
| Linear growth | 10 (83.3%) | 33 (94.3%) | 0.238 | |
| Joints involved at diagnosis (mean, no.) | 32 | 14 | 0.0001 | |
| Joint involvement | Upper limbs | 12 (100%) | 35 (100%) | 1.00 |
| Lower limbs | 10 (83.3%) | 34 (97.1%) | 0.156 | |
| Spine | 8 (66.7%) | 14 (40%) | 0.11 | |
| Symptoms at diagnosis | Swelling | 1 (8.3%) | 35 (100%) | 0.0001 |
| Joint stiffness | 11 (91.7%) | 34 (97.1%) | 0.45 | |
| Contractures | 10 (83.3%) | 10 (28.6%) | 0.0001 | |
| Arthralgia | 8 (66.7%) | 24 (38.6%) | 0.9 | |
| Age at 1st manifestation (mean, years) | 6.1 | 5.3 | 0.608 | |
| Age at diagnosis (mean, years) | 8.9 | 5.8 | 0.021 | |
| Diagnostic delay (mean, years) | 2.9 | 0.3 | 0.0001 | |
| Follow up duration (mean, years) | 6.7 | 5.8 | 0.494 | |