Five-year followup; subgroups, sex distribution, erythrocyte sedimentation rate (ESR), Childhood Health Assessment Questionnaire (CHAQ), disease activity, disease activity duration index during the first 5 years, number of arthritis and involved joints, radiographic joint changes, and use of disease-modifying antirheumatic drugs (DMARD) in 86 incidence cases of juvenile chronic arthritis followed for 17 years. Values are median (range) if not indicated otherwise.
| Disease Subgroup | N (%) | Girls/Boys (% girls) | ESR, mm/h | CHAQ Score | Disease Activity R/I/S/A* | Disease Activity Duration Index | No. Joints with Arthritis | No. Involved Joints | Radiographic Changes, Yes/No | DMARD, Yes/No |
|---|---|---|---|---|---|---|---|---|---|---|
| Systemic | 4 (5) | 1/3 (25) | 7 (2–10), n = 3 | 0.0 (0.0–0.5) | 3/1/0/0 | 0.08 (0.04–0.21) | 0 (0–0) | 0 (0–0) | 0/1 | 0/4 |
| Polyarticular | 29 (45) | 22/7 (76) | 8 (2–75), n = 23 | 0.2 (0.0–1.9) | 7/7/10/5 | 0.56 (0.15–1.00) | 2 (0–32) | 2 (0–42) | 8/14 | 10/19 |
| Pauciarticular | 37 (43) | 28/9 (76) | 6 (2–28), n = 28 | 0.0 (0.0–1.1) | 18/8/8/3 | 0.27 (0.04–0.80) | 0 (0–3) | 0 (0–4) | 2/21 | 0/37 |
| Monoarticular | 6 (7) | 4/2 (67) | 6 (4–8), n = 4 | 0.0 (0.0–0.0) | 4/1/1/0 | 0.13 (0.09–0.18) | 0 (0–1) | 0 (0–1) | 0/4 | 0/6 |
| JAS | 6 (7) | 3/3 (50) | 15 (6–42), n = 4 | 0.9 (0.2–1.9) | 0/0/4/2 | 1.00 (0.87–1.00) | 2 (0–22) | 5 (0–22) | 2/0 | 3/3 |
| JPA | 4 (5) | 3/1 (75) | 7 (2–22), n = 4 | 0.3 (0.0–0.4) | 1/0/2/1 | 0.72 (0.04–1.00) | 2 (0–6) | 6 (0–14) | 0/4 | 0/4 |
| Total | 86 (100) | 61/25 (71) | 7 (2–75), n = 66 | 0.1 (0.0–1.9) | 33/17/25/11 | 0.39 (0.04–1.00) | 0 (0–32) | 1 (0–42) | 12/43 | 13/73 |
↵* Remission/Inactive/Stable/Active. JAS: juvenile ankylosing spondylitis; JPA: juvenile psoriatic arthritis.