Mean (range) status scores* for the MRI features (data from first part of the reliability exercise) (score ranges for the distal interphalangeal (DIP) and proximal interphalangeal (PIP) joints combined in brackets)
| DIP and PIP | DIP† | PIP† | |
|---|---|---|---|
| Synovitis (0–24) | 11.6 (6.3–15.0) | 4.6 (2.7–6.0) | 7.1 (3.7–9.3) |
| Flexor tenosynovitis (0–24) | 5.9 (1.7–10.3) | 2.4 (0.7–4.3) | 3.5 (0.7–6.0) |
| Erosions (0–48) | 13.1 (2.3–29.0) | 7.7 (2.3–15.3) | 5.4 (0.0–17.3) |
| Cysts (0–16) | 0.4 (0.0–2.0) | 0.2 (0.0–1.0) | 0.2 (0.0–1.0) |
| Osteophytes (0–48) | 22.7 (7.3–34.0) | 13.0 (6.7–18.0) | 9.7 (0.7–17.7) |
| Joint space narrowing (0–24) | 10.8 (0.7–15.3) | 6.3 (0.7–9.0) | 4.5 (0.0–8.0) |
| Malalignment frontal (0–8) | 0.9 (0.0–2.3) | 0.8 (0.0–2.3) | 0.1 (0.0–1.3) |
| Malalignment sagittal (0–8) | 0.0 (0.0–0.3) | 0.0 (0.0–0.3) | 0.0 (0.0–0.0) |
| BMLs (0–48) | 4.2 (0.3–9.7) | 1.8 (0.3–4.3) | 2.3 (0.0–6.0) |
| CL absence (0–16) | 6.0 (1.7–13.0) | 4.0 (1.0–7.3) | 2.0 (0.0–5.7) |
| BMLs at CL insertion sites (0–32) | 2.4 (0.0–5.0) | 1.2 (0.0–2.3) | 1.2 (0.0–3.3) |
↵* The values are the mean scores for all three readers combined.
↵† The score range for the DIP and PIP joints separately: 0–4 for malalignment; 0–8 for CL absence and cysts; 0–12 for synovitis and flexor tenosynovitis; 0–16 for BMLs at CL insertion sites; 0–24 for erosions, osteophytes, joint space narrowing and BMLs.
BMLs, bone marrow lesions; CL, collateral ligament.