Table 1.
Patient characteristics
| Patient characteristics | All patients | Patients with TMJ involvement on MRI | Patients without TMJ involvement on MRI | P |
|---|---|---|---|---|
| Total no. of patients, n (%) | 30 | 19 (63) | 11 (37) | |
| Female, n (%) | 16 (53) | 10 (55) | 6 (53) | 0.65 |
| Oligoarticular, n (%) | 10 (33) | 6 (32) | 4 (36) | |
| Oligoarticular extended, n (%) | 2 (7) | 2 (11) | 1 (9) | |
| Polyarticular RF negative, n (%) | 13 (43) | 8 (42) | 4 (36) | 0.74 |
| Enthesitis-related arthritis, n (%) | 4 (13) | 3 (16) | 1 (9) | |
| PsA, n (%) | 1 (3) | 0 (0) | 1 (9) | |
| Age at diagnosis, median (range), years | 5.5 (1.1–14.9) | 4.3 (1.1–14.9) | 6.9 (1.1–14.1) | 0.29 |
| Age at examination, median (range), years | 9.8 (2.8–16.9) | 8.5 (2.8–15.7) | 10.5 (4.8–16.9) | 0.46 |
| Disease duration, median (range), years | 2.4 (0.1–12.3) | 2.3 (0.1–12.3) | 2.6 (0.1–8.7) | 0.91 |
| Global disease activity, median (mean, range), mm (n = 25) | 7 (12, 0–53) | 10 (12, 0–40) | 3 (12, 0–53) | 0.99 |
| HLA-B27 positive/tested, n (%) (n = 27) | 1 (4) | 1/17 (6) | 0/10 (0) | 0.39 |
| ANA positive, n (%) | 20 (67) | 13 (68) | 7 (64) | 1.0 |
| Uveitis, n (%) | 4 (13) | 3 (16) | 1 (9) | 0.51 |
| Median CHAQ score, (mean, range) (n = 23) | 0.0 (0.2, 0.0–1.0) | 0.0 (0.22, 0.0–1.0) | 0.0 (0.18, 0.0–0.75) | 0.77 |
| Treatment with systemic disease-modifying drugs, % | 60 | 45 | 68 | 0.21 |