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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-zeroMedian (IQR)MinMax
Scoring exercise 1
 Inflammation11372.414 (7–24)153
 Backfill2027.82 (1–3)16
 Fat Metaplasia1926.43 (1–7)110
 Sclerosis2940.34 (2–6)115
 Erosion4968.13 (2–8)117
 Ankylosis45.62 (1.5–3.5)15
Scoring exercise 2
 Inflammation9280.714.5 (4.5–29)168
 Backfill4238.93.5 (2–6)116
 Fat metaplasia2523.15 (3–10)133
 Sclerosis4743.54 (2–6)110
 Erosion8578.74 (2–7)124
 Ankylosis1312.05 (2–18)120
  1. Legend: SIS sacroiliac joint inflammation score, SSS sacroiliac joint structural score, IQR interquartile range