Table 1 Clinical characteristics of 13 patients with JIA with long-term symptomatic TMJ arthritis

Females, number (percentage)

13 (100 %)

Median age, years (IQR, years)

17 (15–18.4)^a

TMJ involvement, individuals

 Unilateral

2

 Bilateral

11

JIA Diagnosis, individuals

 Oligoarticular extended

3

 Oligoarticular persistent

1

 Polyarticular

8

 Systemic

1

Medication

 NSAID

5

 Paracetamol

0

 Hydroxychloroquin

1

 Methotrexate

5

 Biologics (anti-TNF)

9

 No medication

1

 Combination of 2 to 3 drugs

4

 Combination of 4 drugs or more

2

Disease duration, years^b

  < 1

0

 1< 3

1

 3–5

2

  > 5

10

TMJ involvement, years^c

  < 1

2

 1–3

1

 3–5

1

  > 5

9