Table 1 Characteristics of JIA patients with and without TMJ arthritis confirmed by MRI

Demographics

 Gender:

 Female n (%)

47(75.8)

12(52.2)

59(69.4)

 Male n (%)

15(24.2)

11(47.8)

26(30.6)

P value

Mean age at the time of MRI Years (± SD)

14.2(±2.6)

12.3 (±3.6)

13.7 (±3.0)

P value

Disease characteristics

 Disease duration in years

2.6(0,2–11)

3(0.6–6)

3.1(0.2–11)

 Median (IQR)

P value

Years from the diagnosis

1.8(0–10)

2.2(0–7)

1.9(0–10)

Median (IQR)

P value

Active joint count^a Median (IQR)

7.8(0–22)

7.7(0–20)

7.8(0–22)

P value

Laboratory characteristics

ESR

12.8(2120)

6(2–20)

10.9(2–120)

Median (IQR)

P value

CRO

7.6(0180)

0.4(0–1.83)

5.6(0–180)

Median (IQR)

P value

ANA positive n (%)

8(38.1)

14(23.3)

22(27.2)

P value

RF positive n (%)

6(9.8)

0(0)

6(7.1)

P value

HLA B27 positive

15(24.2)

3(13.0)

18(21.2)

n (%)

P value