Interobserver concordance in the two US rounds
| US abnormality | Weighted κ coefficients | 95% CI |
|---|---|---|
| B-mode tenosynovitis, round 1 | 0.47 | 0.43 to 0.50 |
| B-mode tenosynovitis, round 2 | 0.45 | 0.41 to 0.48 |
| PD signal, round 1 | 0.64 | 0.61 to 0.67 |
| PD signal, round 2 | 0.65 | 0.62 to 0.68 |
PD, power Doppler; US, ultrasound.