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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