Table 1.
Clinical characteristics of the cohort of 31 patients whose MRI examinations of temporomandibular joints (TMJs) were used for the reliability exercise. Laboratory and physical examination test values are those available at the closest date within three months in relation to the study MRI date. Abbreviations: JIA (juvenile idiopathic arthritis), SD (standard deviation), HLA-B27 (human leukocyte antigen B27), ANA (antinuclear antibody), RF (rheumatoid factor), DMARD (disease modifying antirheumatic drug), anti-TNF (tumor necrosis factor inhibitor).
| Clinical Characteristics of Patient Sample | |
|---|---|
| Age at diagnosis (years) | 8.0 (SD 4.5, range 0.5–15.3) |
| Age at MRI (years) | 11.6 (SD 3.0, range 6.2–16.9) |
| Disease duration (years) | 3.6 (SD 4.4, range 6.8–15.7) |
| Sex | 5 male, 26 female |
| JIA subtype | |
| Oligoarticular | 12 |
| Oligoarticular extended | 5 |
| Polyarticular | 9 (all RF−) |
| Enthesitis related | 1 |
| Psoriatic arthritis | 1 |
| Undifferentiated | 1 |
| No JIA diagnosis | 2 |
| HLA-B27+ (n tested, % of tested) | 1 (19, 5%) |
| ANA+ | 18 (58%) |
| RF+ (n tested, % of tested) | 1 (30, 3%) |
| Uveitis | 7 (23%) |
| Facial changes (including asymmetry, decreased condylar translation, retrognathia) | 19 (61%) |
| Crepitation | 4 (13%) |
| Decreased mouth opening (<10th percentile) | 10 (32%) |
| TMJ pain | 7 (23%) |
| Active treatment (including NSAIDs, DMARDs, anti-TNF, etc.) | 20 (65%) |
| History of DMARD use (past and/or current) | 15 (48%) |