Table 1 Demographic and disease characteristics

N

18

63

6

40

12

3

18

Age (yrs)

10.7 (5.8, 19.9)

9.9 (2.6, 18.6)

15.3 (10.8, 21.1)

11.2 (3.5,1 9.6)

13.5 (8.9,20.1)

12.9 (8.6,17.6)

17.0 (9.7, 21.2)

Gender (F/M)

8/10

52/11

5/1

34/6

12/0

2/1

9/9

Onset age (yrs)

5.5 (0.9, 13.0)

3.7 (0.8, 15.8)

8.2 (1.6, 14.8)

4.5 (1,15.6)

11.2 (6.7,15.6)

7.3 (6.3,13.0)

10.3 (3.0, 15.6)

Diagnostic age (yrs)

6.1 (1.0, 13.3)

4.3 (1, 16.6)

9.2 (1.9, 15.3)

5.4 (1.3, 17.3)

11.8 (6.9,16.1)

7.4 (7.3,13.4)

13.2 (9.7, 18.4)

Duration from diagnosis (yrs)

0.1 (0,1.1)

0.3 (0, 10.0)

0.3 (0, 2.0)

0.4 (0.0, 5.4)

0.4 (0,1.0)

0.3 (0.2,1.0)

2.1 (0, 5.3)

ANA+ n (%)

4 (22%)

36 (57%)

4 (67%)

15 (37.5%)

7 (58%)

1 (33%)

9 (50%)

RF+ n (%)

0 (0%)

1 (1.5%)

1 (16.7%)

0 (0%)

12 (100%)

1 (33%)

1 ((5.6%)

B27+ n (%)

n/a

1 (1.5%)

1 (16.7%)

0 (0%)

0 (0%)

0 (0%)

6 (33%)

Race/Ethn.

White/non-Hispanic

14

48

6

32

8

2

14

Hispanic

1

7

7

3

2

African American

2

1

1

1

Asian

1

3

1

Other

4

1

1