Crude odds ratio (OR) and exact 95% confidence intervals (CI) for the association of hand and knee osteoarthritis
| Group | OR (95% CI) |
| All hand and knee | 5.98 (1.25 to 56.37) |
| DIP and knee | 2.80 (0.66 to 13.77) |
| PIP and knee | 2.40 (0.46 to 10.48) |
| CMC1 and knee | 1.82 (0.43 to 8.95) |
| Two or more joints and knee | 11.67 (1.13 to 379.57) |
DIP/PIP, distal/proximal interphalangeal joint; CMC1, 1st carpometacarpal joint.