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Table 1 Absolute, non-zero (SSS), and ≥ 2 (SIS) change score findings for all raters

From: Spondyloarthritis Research Consortium of Canada sacroiliac joint inflammation and structural scores: change score reliability and recalibration utility in children

 

N

% Non-zero

Median (IQR)

Min

Max

Scoring exercise 1

 Inflammation

113

72.4

14 (7–24)

1

53

 Backfill

20

27.8

2 (1–3)

1

6

 Fat Metaplasia

19

26.4

3 (1–7)

1

10

 Sclerosis

29

40.3

4 (2–6)

1

15

 Erosion

49

68.1

3 (2–8)

1

17

 Ankylosis

4

5.6

2 (1.5–3.5)

1

5

Scoring exercise 2

 Inflammation

92

80.7

14.5 (4.5–29)

1

68

 Backfill

42

38.9

3.5 (2–6)

1

16

 Fat metaplasia

25

23.1

5 (3–10)

1

33

 Sclerosis

47

43.5

4 (2–6)

1

10

 Erosion

85

78.7

4 (2–7)

1

24

 Ankylosis

13

12.0

5 (2–18)

1

20

  1. Legend: SIS sacroiliac joint inflammation score, SSS sacroiliac joint structural score, IQR interquartile range