Remaining variables in the block-wise forward conditional multivariable regression analysis including age, sex and disease duration (block 1), erosions, joint space narrowing (JSN), osteophytes and malalignment (block 2) and Grey scale (GS) and power Doppler (PD) (block 3) for tenderness as the dependent variable in non-swollen joints
| Disease | Variable | OR |
| Rheumatoid arthritis | Sex | 0.40, 95% CI 0.19 to 0.84, p=0.02 |
| JSN | 1.12, 95% CI 1.00 to 1.26, p=0.06 | |
| Disease duration | 1.03, 95% CI 1.00 to 1.07, p=0.07 | |
| Psoriatic arthritis | Malalignment | 3.91 95% CI 1.29 to 11.87, p=0.02 |
| Osteoarthritis | Osteophytes | 2.05, 95% CI 1.12 to 3.74, p=0.02 |
| Malalignment | 2.75, 95% CI 0.91 to 8.38, p=0.07 | |
| GS | 1.56, 95% CI 1.07 to 2.28, p=0.2 | |
| PD | 1.05, 95% CI 0.46 to 2.38, p=0.91 |