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Table 1 Patients characteristics

From: Is early TMJ involvement in children with juvenile idiopathic arthritis clinically detectable? Clinical examination of the TMJ in comparison with contrast enhanced MRI in patients with juvenile idiopathic arthritis

Patients characteristics All patients Patients with TMJ involvement on MRI Patients without TMJ involvement on MRI
Total no. of patients, n (%) 76 53 (70) 23 (30)
Female, n (%) 42 (55) 29 (69) 13 (31)
Oligoarticular, n (%) 24 (32) 17 (32) 7 (30)
Enthesitis related arthritis n (%) 9 (12) 7 (13) 2 (9)
Oligoarticular extended, n (%) 11(15) 7 (13) 4 (17)
Polyarticular RF neg, n (%) 25 (33) 19 (36) 6 (26)
Systemic, n (%) 1 (1) 1 (2) 0 (0)
PsA, n (%) 2 (3) 1 (2) 1 (4)
Unclassified, n (%) 4 (5) 1 (2) 3 (13)
Age at diagnosis, median (range), years 5.5 (1–14.9) 5.4 (1–19.4) 6.6 (1.1–14.1)
Age at examination, median (range), years 9.7 (1.9–18.6) 9.6 (1.9–18.6) 9.8 (4.8–17.8)
Disease duration, median (range), years 2.4 (0.0–15.7) 1.9 (0.0–15.4) 3.5 (0.1–15.7)
HLA-B27 positive/tested, n (%) (n = 59) 6 (10) 4 (10) 2 (11)
ANA positive, n (%) (n = 74) 47 (64) 33 (62) 14 (61)
Uveitis, n (%) 11 (15) 6 (11) 5 (22)
Treatment with systemic disease-modifying drugs, n (%) 31 (41) 23 (43) 8 (35)
Infliximab, n (%) 4 (5) 4 (10) 0 (0)
Etanercept, n (%) 1 (1) 0 (0) 1 (4)
Methotrexate, n (%) 31 (41) 23 (43) 8 (35)
  1. TMJ involvement on MRI = signs of inflammation (effusion/increased enhancement) and/or deformation