Table 1 Baseline features of the 394 study patients considered as a whole and divided by functional category

N (%) females

292 (74.1)

16 (57.1)

137 (72.1)

126 (79.2)

13 (76.5)

Age at disease onset, years

3 (1.8—6.9)

5.2 (2.9—8.9)

2.7 (1.8—5.9)

2.8 (1.9—6.8)

6 (1.3—11.7)

Age, years

3.2 (2—7)

5.3 (3.2—8.9)

3 (2—6.1)

3.1 (2—6.9)

6.1 (1.6—12.6)

Disease duration, months

2.1 (1.1 – 3.7)

1.34 (0.7 – 2.2)

2.2 (1.1 – 4.2)

2.0 (1.1–3.4)

2.06 (1.6 −4.0)

N (%) ANA-positive

271/392 (69.1)

6 (22.2)

151 (79.9)

105 (65.4)

10 (58.8)

N (%) with uveitis

16/375 (4.3)

0 (0)

9 (4.7)

7 (4.4)

0 (0)

Physician global assessment

4 (3—6)

5 (2.8—6.2)

3 (2—4)

6 (4 −7)

3 (2—5)

Count of active joints

2 (1—5)

1.5 (0—5.8)

2 (1—2)

5 (3 −7)

2 (1—4)

Erythrocyte sedimentation rate, mm/h

34 (16 – 51)

44 (29.5—67)

31 (14—46.3)

36.5 (17 −54)

38 (9.3—63)

C-reactive protein, mg/dl

0.8 (0.5—2.3)

6.6 (1.3—11.6)

0.5 (0.5 −1.3)

1.03 (0.5 – 2.5)

0.7 (0.5 −2.7)