Table 4.

Interobserver reproducibility between the 50% clinical reference standard and the 50% sonography reference standard [B-mode: at least minimal synovial thickening; and power Doppler (PD) mode: grade 1].

Clinical SynovitisSonographic Synovitis
B-modePD ModeB-mode and PD
NoYesNoYesNoYes
No754911671167
Yes66644284527
Kappa0.460.370.36