Orofacial symptoms, dysfunctions, and temporomandibular radiological appearance according to JIA category (n = 245).
| Variables | Total Cohort, n = 245 | sJIA, n = 10 | Oligo persist, n = 52 | Oligo ext, n = 53 | Poly RF–, n = 51 | Poly RF+, n = 4 | Psoriatic, n = 13 | ERA, n = 24 | Undiff, n = 38 |
|---|---|---|---|---|---|---|---|---|---|
| TMJ-reported pain | 65 (26.5) | 2 (20.0) | 8 (15.4) | 14 (26.4) | 12 (23.5) | 1 (25.0) | 4 (30.8) | 10 (41.7) | 14 (36.8) |
| TMJ morning stiffness | 42 (17.1) | 1 (10.0) | 8 (15.4) | 6 (11.3) | 12 (23.5) | 0 (0.0) | 2 (15.4) | 4 (16.7) | 9 (23.7) |
| Chewing limitations | 35 (14.3) | 0 (0.0) | 5 (9.6) | 6 (11.3) | 8 (15.7) | 1 (25.0) | 3 (23.1) | 4 (16.7) | 8 (21.1) |
| MIO < 2 SD | 51 (20.8) | 0 (0.0) | 5 (9.6) | 14 (26.4) | 13 (25.5) | 1 (25.0) | 2 (15.4) | 5 (20.8) | 11 (28.9) |
| TMJ pain on palpation | 59 (24.1) | 1 (10.0) | 8 (15.4) | 13 (24.5) | 12 (23.5) | 1 (25.0) | 4 (30.8) | 4 (16.7) | 16 (42.1) |
| Normal bilateral radiological appearance | 96 (39.2) | 5 (50.0) | 26 (50.0) | 17 (32.1) | 12 (23.5) | 1 (25.0) | 5 (41.7) | 16 (66.7) | 14 (36.8) |
| Radiological deformities and/or erosions | 149 (60.8) | 5 (50.0) | 26 (50.0) | 36 (67.9) | 39 (76.5) | 3 (75.0) | 8 (61.5) | 8 (33.3) | 24 (63.2) |
Values indicate n (%) of joints. JIA: juvenile idiopathic arthritis; sJIA: systemic JIA; oligo persist: persistent oligoarticular JIA; oligo ext: extended oligoarticular JIA; poly RF–: polyarticular rheumatoid factor–negative JIA; poly RF+: polyarticular RF-positive JIA; ERA: enthesitis-related arthritis; Undiff: undifferentiated JIA; TMJ: temporomandibular joint; MIO: maximal incisal opening.