Table 3.
Agreement between CE (tender and/or swollen) and US (GS ≥2 or PD ≥1) synovitis, by joint type*
| PEA, % | Sp0, % | Sp1, % | US > CE, % | CE > US, % | κ (95% CI) | PABAK | |
|---|---|---|---|---|---|---|---|
| Shoulder† | 62 | 76 | 10 | 0 | 38 | 0.06 | 0.24 |
| Elbow‡ | 83 | 90 | 37 | 0 | 17 | 0.31 | 0.65 |
| Wrist | 57 | 64 | 48 | 31 | 12 | 0.14 | 0.14 |
| MCP1 | 78 | 86 | 49 | 4 | 18 | 0.37 | 0.56 |
| MCP2 | 71 | 78 | 58 | 16 | 12 | 0.36 | 0.42 |
| MCP3 | 69 | 79 | 42 | 10 | 20 | 0.23 | 0.38 |
| MCP4 | 80 | 88 | 29 | 7 | 13 | 0.17 | 0.60 |
| MCP5 | 68 | 80 | 24 | 19 | 12 | 0.05 | 0.36 |
| PIP1 | 78 | 87 | 40 | 6 | 16 | 0.28 | 0.56 |
| PIP2 | 78 | 85 | 59 | 6 | 16 | 0.44 | 0.56 |
| PIP3 | 78 | 85 | 59 | 5 | 17 | 0.45 | 0.56 |
| PIP4 | 81 | 88 | 42 | 5 | 14 | 0.32 | 0.62 |
| PIP5 | 88 | 93 | 57 | 1 | 11 | 0.51 | 0.76 |
| Knee | 65 | 72 | 55 | 21 | 13 | 0.27 | 0.30 |
| Ankle§ | 70 | 82 | 26 | 1 | 29 | 0.17 | 0.40 |
| MTP1 | 63 | 75 | 31 | 27 | 10 | 0.09 | 0.26 |
| MTP2 | 60 | 70 | 40 | 34 | 6 | 0.17 | 0.20 |
| MTP3 | 69 | 79 | 46 | 22 | 8 | 0.27 | 0.38 |
| MTP4 | 74 | 84 | 32 | 14 | 11 | 0.17 | 0.48 |
| MTP5 | 79 | 88 | 16 | 11 | 10 | 0.04 | 0.58 |
| Total | 73 | 82 | 43 | 12 | 15 | 0.25 | 0.46 |
| Total¶ | 74 | 83 | 47 | 10 | 16 | 0.30 | 0.48 |
*
CE = clinical examination; US = ultrasound; GS = gray-scale; PD = power Doppler; PEA = percentage exact agreement; Sp0 = agreement specific to a score of 0; Sp1 = agreement specific to a score of 1; 95% CI = 95% confidence interval; PABAK = prevalence-adjusted bias-adjusted kappa; MCP = metacarpophalangeal; PIP = proximal interphalangeal; MTP = metatarsophalangeal.
†
Posterior glenohumeral joint.
‡
Olecranon fossa.
§
Tibiotalar joint.
¶
Excluding MTP joints/ankles.