Quantitative ultrasound results displayed for two subgroups of patients with less and more than five years' disease duration
| Parameter | Site | Controls | Early RA (<5 years' disease duration) (n=12) | Advanced RA (>5 years' disease duration) (n=17) |
| AD-SoS | ||||
| Z score | Metaphysis | −0.19 (0.67) | −1.66 (1.36) | −2.37 (1.12) |
| Z scoreest | Joint | +0.01 (0.86) | −2.42 (1.51) | −3.55 (3.27) |