Concordance (κ) at baseline between a synovitis grade of 1 or more by B-mode ultrasonography (B-US) versus power Doppler ultrasonography (PDUS).
| PDUS Grade ≥ 1 | ||||
|---|---|---|---|---|
| Joint Site | B-US Grade ≥1 | Yes | No | κ (95% CI) |
| Shoulder | Yes | 16 | 35 | 0.34 (0.19; 0.48) |
| No | 3 | 98 | ||
| Elbow | Yes | 26 | 23 | 0.59 (0.45; 0.73) |
| No | 1 | 102 | ||
| Wrist | Yes | 89 | 31 | 0.52 (0.39; 0.65) |
| No | 1 | 30 | ||
| MCP1 | Yes | 50 | 39 | 0.51 (0.40: 0.63) |
| No | — | 62 | ||
| MCP2 | Yes | 65 | 40 | 0.50 (0.39; 0.62) |
| No | — | 47 | ||
| MCP3 | Yes | 46 | 29 | 0.60 (0.49; 0.72) |
| No | 1 | 76 | ||
| MCP4 | Yes | 26 | 26 | 0.57 (0.43; 0.70) |
| No | — | 100 | ||
| MCP5 | Yes | 32 | 35 | 0.50 (0.38; 0.63) |
| No | — | 84 | ||
| PIP1 | Yes | 21 | 43 | 0.36 (0.24; 0.48) |
| No | — | 87 | ||
| PIP2 | Yes | 29 | 35 | 0.48 (0.35; 0.61) |
| No | 1 | 87 | ||
| PIP3 | Yes | 33 | 32 | 0.54 (0.42; 0.67) |
| No | — | 87 | ||
| PIP4 | Yes | 24 | 17 | 0.67 (0.54; 0.81) |
| No | — | 111 | ||
| PIP5 | Yes | 17 | 25 | 0.50 (0.34; 0.65) |
| No | — | 110 | ||
| Knee | Yes | 19 | 47 | 0.31 (0.19; 0.43) |
| No | — | 85 | ||
| MTP1 | Yes | 30 | 58 | 0.30 (0.20; 0.40) |
| No | — | 60 | ||
| MTP2 | Yes | 40 | 60 | 0.31 (0.21; 0.41) |
| No | — | 51 | ||
| MTP3 | Yes | 35 | 55 | 0.34 (0.24; 0.44) |
| No | — | 61 | ||
| MTP4 | Yes | 23 | 50 | 0.32 (0.21; 0.44) |
| No | — | 78 | ||
| MTP5 | Yes | 36 | 30 | 0.58 (0.45; 0.70) |
| No | — | 86 | ||
MCP: metacarpophalangeal joint; PIP: proximal interphalangeal joint; MTP: metatarsophalangeal joint.