US testing intraobserver and interobserver reliability on small erosions in patients with RA and healthy controls.
| Intraobserver | Interobserver | |||
|---|---|---|---|---|
| Normal Break | Abnormal Break | Normal Break | Abnormal Break | |
| Palmar long | 0.1–0.8 | 0.6–0.9 | 0.8 | 0.9 |
| Dorsal long | 0.4–0.6 | −0.1–0.5 | 0.4 | 0.7 |
| Palmar transv | 0.2–0.7 | 0.5–0.7 | 0.7 | 0.5 |
| Dorsal transv | 0.3–0.9 | 0.4–0.8 | 0.3 | 0.4 |
US: ultrasound; RA: rheumatoid arthritis.