Table 2 Sensitivity, specificity and accuracy of radiography, MRI and US for bone erosions, with CT as reference
MCP 2 | MCP 3 | MCP 4 | MCP 5 | Total | |||||
|---|---|---|---|---|---|---|---|---|---|
Proximal | Distal | Proximal | Distal | Proximal | Distal | Proximal | Distal | ||
Quadrants with CT erosions | 18 | 18 | 13 | 3 | 9 | 5 | 8 | 4 | 78 |
Quadrants with radiographic erosions | 7 | 7 | 0 | 0 | 1 | 0 | 1 | 0 | 16 |
Quadrants with MRI erosions | 19 | 11 | 16 | 0 | 7 | 2 | 8 | 1 | 64 |
Quadrants with US erosions | 25 | 11 | 4 | 1 | 3 | 0 | 9 | 2 | 55 |
Radiography sensitivity | 33% | 39% | 0% | 0% | 11% | 0% | 13% | 0% | 19% |
Radiography specificity | 96% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% |
Radiography accuracy | 69% | 74% | 69% | 93% | 81% | 88% | 83% | 90% | 81% |
MRI sensitivity | 83% | 61% | 85% | 0% | 78% | 40% | 75% | 25% | 68% |
MRI specificity | 83% | 100% | 83% | 100% | 100% | 100% | 94% | 100% | 96% |
MRI accuracy | 83% | 83% | 83% | 93% | 95% | 93% | 90% | 93% | 89% |
US sensitivity | 94% | 33% | 8% | 0% | 33% | 0% | 63% | 25% | 42% |
US specificity | 67% | 79% | 90% | 97% | 100% | 100% | 88% | 97% | 91% |
US accuracy | 79% | 59% | 64% | 90% | 86% | 88% | 83% | 90% | 80% |