Table 1.
Conjoint analysis survey-derived relative percentage weight for the measurement components of the JAMRIS-SIJ. Following the grading of an image, the percentage weight of each component grade was added to constitute the domain percentage disease severity score ranging from 0–100% for seven inflammation and five damage domain items, respectively. The percentage weights are reported as group means relative weights. BME; bone marrow edema, IEC; inflammation in erosion cavity, JSE; joint space enhancement, JSF; joint space fluid, FML; fat metaplasia lesion. ICC: intraclass correlation coefficient.
| Inflammation Domain | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Grades | |||||||||||
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | ICC (2,1) | ICC (2,k) | |
| Osteitis | 0 | 3.9 | 7.7 | 11.2 | 14.4 | 17.2 | 19.8 | 23.3 | 24.7 | 0.66 | 0.97 |
| BME | 0 | 3.2 | 6.4 | 9.5 | 12.6 | 15.6 | 18.5 | 21.4 | 24.3 | 0.59 | 0.96 |
| IEC | 0 | 5.3 | 10 | 13.7 | 16.9 | -- | -- | -- | -- | 0.52 | 0.95 |
| JSE | 0 | 4.5 | 8.2 | 10.9 | 13.1 | -- | -- | -- | -- | 0.34 | 0.90 |
| JSF | 0 | 2.8 | 5.1 | 7.1 | 9.1 | -- | -- | -- | -- | 0.17 | 0.78 |
| Capsulitis | 0 | 3.9 | 7.3 | -- | -- | -- | -- | -- | -- | 0.41 | 0.92 |
| Enthesitis | 0 | 4.6 | -- | -- | -- | -- | -- | -- | -- | 0.76 | 0.98 |
| All Items | -- | -- | -- | -- | -- | -- | -- | -- | -- | 0.60 | 0.96 |
| Damage Domain | |||||||||||
| Grades | |||||||||||
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | ICC (2,1) | ICC (2,k) | |
| Ankylosis | 0 | 10 | 20.2 | 30.7 | 41.3 | 0.79 | 0.98 | ||||
| Erosion | 0 | 3.7 | 7.2 | 10.6 | 13.9 | 16.9 | 19.8 | 22.5 | 25.1 | 0.60 | 0.96 |
| Backfill | 0 | 3.9 | 7.5 | 10.8 | 13.9 | 0.59 | 0.96 | ||||
| Sclerosis | 0 | 1.8 | 3.6 | 55.2 | 6.6 | 7.8 | 8.9 | 9.8 | 10.7 | 0.23 | 0.83 |
| FML | 0 | 1.6 | 3.1 | 4.5 | 5.7 | 6.6 | 7.5 | 8.3 | 9.1 | 0.33 | 0.90 |
| All Items | 0.73 | 0.98 | |||||||||