| Abnormality | Joints % (n) | Median score (IQR) | Difference* (90% CI) | |||
|---|---|---|---|---|---|---|
| HC (n=10) | OA no pain (n=11) | OA pain (n=15) | OA no pain (n=11) | OA pain (n=15) | ||
| Fluid | 30 (3) | 73 (8) | 67 (10) | 2 (0, 4) | 1 (0, 2) | 0 (-2, 1) |
| Capsulitis/synovitis | – (0) | 36 (4) | 60 (9) | 0 (0, 1) | 1 (0, 2) | 0 (0, 2) |
| Extracapsular oedema | – (0) | 45 (5) | 73 (11) | 0 (0, 2) | 2 (0, 3) | 1 (0, 2) |
| CL thickening | 50 (5) | 100 (11) | 100 (15) | 2 (2, 4) | 2 (2, 4) | 1 (-1, 2) |
| CL oedema | 40 (4) | 91 (10) | 87 (13) | 2 (1, 3) | 3 (2, 4) | 1 (0, 3) |
| CL degeneration | 40 (4) | 91 (10) | 100 (15) | 3 (1, 5) | 4 (2, 6) | 1 (-1, 3) |
| Proximal joint bone oedema | – (0) | 9 (1) | 20 (3) | 0 (0, 0) | 0 (0, 0) | 0 (0, 0) |
| Distal joint bone oedema | – (0) | 27 (3) | 20 (3) | 0 (0, 1) | 0 (0, 0) | 0 (0, 0) |
| Proximal joint bone cyst | – (0) | 27 (3) | 47 (7) | 0 (0, 2) | 0 (0, 2) | 0 (0, 1) |
| Distal joint bone cyst | 10 (1) | 27 (3) | 7 (1) | 0 (0, 1) | 0 (0, 0) | 0 (0, 0) |
*Accounting for clustering of joints within patients. CI = confidence interval; HC = healthy controls; IQR = inter-quartile range; CL = collateral ligaments.