Table 1

 Intra-reader and inter-reader agreements found in the two rounds.

Mean and range of intra-reader κ valuesInter-readerκ values,round oneInter-reader kappa values, round two
17 (round one) and 16 (round two) physician sonographers assessed 99 video clips recorded in multiple synovial sites of healthy persons and patients
Doppler signal: yes or no0.82 (0.58–0.96)0.660.66
Amount of Doppler signal (scale 0–3)0.72 (0.38–0.93)0.570.53
Case is normal or abnormal0.80 (0.57–0.96)0.520.55