Joint cartilage thickness and JADAS10 score between disease duration groups.
| Disease Duration | Group 1 0–12 Months, n = 9 | Group 2 13–60 Months, n = 45 | Group 3 > 60 Months, n = 41 | p* |
|---|---|---|---|---|
| Knee | 2.5 mm (± 0.7) | 2.7 mm (± 0.7) | 2.7 mm (± 0.6) | grp 1 < grp 2: p = 0.03 |
| grp 1 < grp 3: p = 0.01 | ||||
| Ankle | 0.8 mm (± 0.3) | 1.0 mm (± 0.3) | 1.0 mm (± 0.3) | grp 1 < grp 2: p = 0.01 |
| grp 1 < grp 3: p < 0.001 | ||||
| Wrist | 1.2 mm (± 0.6) | 1.2 mm (± 0.5) | 1.2 mm (± 0.4) | No difference |
| Second MCP | 1.1 mm (± 0.5) | 1.0 mm (± 0.5) | 0.9 mm (± 0.4) | No difference |
| Second PIP | 0.3 mm (± 0.1) | 0.4 mm (± 0.2) | 0.4 mm (± 0.2) | grp 1 < grp 2: p < 0.001 |
| grp 1 < grp 3: p < 0.001 | ||||
| JADAS10 score, range 0–40 | 9.0 score (± 7.4) | 2.8 score (± 2.7) | 4.5 score (± 4.2) | grp 1 > grp 2: p = 0.02 |
| grp 3 > grp 2: p < 0.05 | ||||
| grp 1 > grp 3: p = 0.08 |
↵* Regression analysis controlled for age and sex and adjusted for clustered data (right/left extremities). MCP: metacarpophalangeal; PIP: proximal interphalangeal; JADAS10: 10-joint juvenile arthritis disease activity score.