Patterns of joint involvement by symmetry, row and ray for increasing grades of radiographic osteoarthritis and erosive osteoarthritis
| Groups of Joints | K&L≥2 | K&L≥3 | K&L=4 | Erosive osteoarthritis | ||||
|---|---|---|---|---|---|---|---|---|
| aOR | (95% CI) | aOR | (95% CI) | aOR | (95% CI) | aOR | (95% CI) | |
| Same joint, opposite hand | 3.8 | (3.1 to 4.5) | 6.0 | (4.2 to 8.5) | 6.0 | (3.4 to 10.5) | 6.5 | (3.0 to 14.1) |
| Same row, same hand | 3.2 | (2.7 to 3.8) | 3.1 | (2.1 to 4.6) | 4.2 | (2.3 to 7.8) | 2.0 | (0.8 to 5.0) |
| Same ray, same hand | 0.9 | (0.7 to 1.2) | 0.5 | (0.3 to 0.9) | 0.3 | (0.1 to 0.8) | 0.3 | (0.03 to 2.5) |
aOR, adjusted OR for age, gender, hand joint, hand side and number of affected interphalangeal joints; K&L, Kellgren and Lawrence.