Measurements of joint cartilage in 5 joints. Patients with juvenile idiopathic arthritis (JIA) are compared to healthy controls. Values are in mm.
| JIA, mean (± SD) | Controls, mean (± SD), n = 788 | Difference (95% CI)* | p* | |
|---|---|---|---|---|
| Knee | 2.7 (0.7) n = 187 | 3.5 (0.5) | 0.73 (0.62–0.84) | < 0.001 |
| Ankle | 0.9 (0.5) n = 188 | 0.9 (0.2) | −0.03 (−0.08–0.02) | 0.25 |
| Wrist | 1.1 (0.5) n = 188 | 1.5 (0.5) | 0.27 (0.19–0.35) | < 0.001 |
| Second MCP | 0.8 (0.6) n = 189 | 1.0 (0.3) | −0.03 (−0.08–0.02) | 0.20 |
| Second PIP | 0.3 (0.2) n = 190 | 0.7 (0.2) | 0.28 (0.25–0.31) | < 0.001 |
↵* Regression analysis controlled for age and sex and adjusted for clustered data (right/left extremities). MCP: metacarpophalangeal; PIP: proximal interphalangeal