Table 2 Reliability of change scores for the SIS and SSS components

 Inflammation

0.8 (0.69–0.89)

0.84 (0.7–0.92)

0.96 (0.9–0.98)

 Backfill

0.3 (0.1–0.62)

0.49 (0.14–0.79)

− 0.74 (− 0.92–0.09)

 Fat metaplasia

0.46 (0.23–0.75)

0.55 (0.19–0.82)

0.29 (− 0.34–0.73)

 Sclerosis

0.53 (0.3–0.79)

0.49 (0.14–0.8)

0.46 (− 0.12–0.81)

 Erosion

0.38 (0.16–0.69)

0.6 (0.26–0.85)

0.33 (− 0.19–0.74)

 Ankylosis

0.06 (− 0.07–0.35)

0 (− 0.29–0.44)

0 (0–0)

 Inflammation

0.83 (0.71–0.92)

0.85 (0.7–0.93)

0.82 (0.6–0.93)

 Backfill

0.54 (0.35–0.75)

0.52 (0.24–0.76)

0.88 (0.71–0.95)

 Fat metaplasia

0.65 (0.47–0.82)

0.92 (0.84–0.97)

0.17 (− 0.3–0.58)

 Sclerosis

0.33 (0.15–0.58)

0.38 (0.1–0.67)

0.41 (− 0.07–0.73)

 Erosion

0.60 (0.41–0.79)

0.65 (0.4–0.84)

0.72 (0.4–0.89)

 Ankylosis

0.96 (0.93–0.98)

0.94 (0.87–0.97)

1 (1–1)