Generalized κ, ICC, and SDD statistics of the different items scored from 25 juvenile idiopathic arthritis patients with MRI of the knee.
| MRI Feature | ICC or κ | 95% CI | SDD | SDD% |
|---|---|---|---|---|
| JAMRIS item | ||||
| Synovial thickening, 0–12 | ICC 0.95 | 0.92–0.97 | 3.19 | 27 |
| Bone marrow changes, 0–24 | ICC 0.87 | 0.80–0.92 | 10.94 | 55 |
| Cartilage lesions, 0–24 | ICC 0.55 | 0.37–0.69 | 13.65 | 76 |
| Bone erosions, 0–24 | ICC 0.72 | 0.59–0.81 | 1.41 | 35 |
| IPSG item | ||||
| Synovial thickening, 0–3 | ICC 0.94 | 0.91–0.96 | 0.39 | 13 |
| Joint effusion, 0–3 | ICC 0.93 | 0.89–0.95 | 0.51 | 17 |
| Cartilage lesions, 0–4 | ICC 0.60 | 0.44–0.73 | 8.30 | 69 |
| Bone erosions, 0–2 | ICC 0.57 | 0.40–0.70 | 4.10 | 41 |
| Subchondral cysts, 0–2 | κ 0.01 | NA | NA | NA |
| Synovial enhancement, 0–12* | ICC 0.90 | 0.85–0.94 | 9.85 | 82 |
| Infrapatellar fat pad heterogeneity, 0–1 | κ 0.27 | NA | NA | NA |
| Enthesopathy, 0–1 | κ 0.19 | NA | NA | NA |
| Tendinopathy, 0–1 | κ 0.01 | NA | NA | NA |
↵* According to Damasio, et al18. MRI: magnetic resonance imaging; SDD: smallest detectable difference; NA: not applicable; JAMRIS: Juvenile Arthritis MRI Scoring; IPSG: International Prophylaxis Study Group.