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Table 2 Demographic and clinical features of the JIA population. Continuous variables are presented as mean ± sd

From: Defining the normal appearance of the temporomandibular joints by magnetic resonance imaging with contrast: a comparative study of children with and without juvenile idiopathic arthritis

Feature Number
n 35
Sex  
 Male 11 (31%)
 Female 24 (69%)
Race  
 Biracial 1 (2.9%)
 Caucasian 28 (80%)
 African-American 6 (17%)
Age at MRI (years; mean ± SD) 9.6 ± 4.7
Time from diagnosis to MRI (months; mean ± SD) 2.2 ± 1.8
Time from initial symptom to MRI (months; mean ± SD) 12 ± 17
JIA category  
 Oligoarticular 5 (14%)
 Systemic 3 (8.6%)
 RF- polyarticular 14 (40%)
 RF+ polyarticular 3 (8.6%)
 Psoriatic 7 (20%)
 Enthesitis-related arthritis 3 (8.6%)
Disease activity assessments  
 Swollen joint count 8.2 ± 8.3
 ESR (n = 32; mm / hr) 32 ± 28
 Physician global assessment (0–10) 3.3 ± 1.4
Exam findings of TMJ activity or damage  
 Maximal incisal opening (n = 34; mm) 4.5 ± 0.9
 Jaw deviation (n = 29) 7 (24%)
Medications  
 None 4 (11%)
 Prednisone alone 2 (5.7%)
 Methotrexate alone 13 (37%)
 Biologic alone 3 (8.6%)
 Methotrexate plus biologic 13 (37%)
  1. Abbreviations: ESR erythrocyte sedimentation rate, TMJ temporomandibular joint