Joint | Quadrants with erosions | Quadrants with no erosions on US, MRI or CR | Agreement | Sensitivity | Specificity | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | US + MRI + CR | US + MRI | MRI + RAD | US + CR | US only | MRI only | CR only |  | US versus MRI (%) | CR versus MRI (%) | US | CR | US | CR |
MCP 2nd | 10 | 10 | 2 | 1 | 2 | 7 | 3 | 205 | 225(94) | 217(90) | 0.64 | 0.41 | 0.98 | 0.98 |
   Est. | 9 | 8 | 2 | 1 | 1 | 2 | 2 | 55 | 72(90) | 66(82) |  |  |  |  |
   Early | 1 | 2 | 0 | 0 | 1 | 2 | 0 | 74 | 77(96) | 75(94) |  |  |  |  |
   Control | 0 | 0 | 0 | 0 | 0 | 3 | 1 | 76 | 76(95) | 76(95) |  |  |  |  |
MCP 3rd | 7 | 7 | 4 | 1 | 4 | 12 | 2 | 230 | 217(90) | 214 (89) | 0.47 | 0.37 | 0.97 | 0.98 |
   Est. | 6 | 6 | 4 | 1 | 3 | 6 | 2 | 52 | 64(80) | 62 (78) |  |  |  |  |
   Early | 1 | 1 | 0 | 0 | 1 | 2 | 0 | 75 | 77(96) | 76 (95) |  |  |  |  |
   Control | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 76 | 76(95) | 76 (95) |  |  |  |  |
MCP 4th | 5 | 2 | 0 | 1 | 1 | 5 | 0 | 222 | 229 (97) | 227 (96) | 0.58 | 0.42 | 0.99 | 0.99 |
   Est. | 4 | 1 | 0 | 1 | 1 | 5 | 0 | 64 | 69 (91) | 68 (89) |  |  |  |  |
   Early | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 78 | 80 (100) | 79 (99) |  |  |  |  |
   Control | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 80 | 80 (100) | 80 (100) |  |  |  |  |
MCP 5th | 7 | 1 | 0 | 1 | 3 | 2 | 1 | 221 | 229 (97) | 228 (97) | 0.80 | 0.70 | 0.98 | 0.99 |
   Est. | 6 | 0 | 0 | 1 | 2 | 0 | 0 | 67 | 73 (96) | 73 (96) |  |  |  |  |
   Early | 1 | 1 | 0 | 0 | 1 | 0 | 1 | 76 | 78 (97) | 77 (96) |  |  |  |  |
   Control | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 78 | 78 (97) | 78 (97) |  |  |  |  |
PIP 2nd | 0 | 0 | 0 | 0 | 6 | 1 | 1 | 212 | 212 (96) | 212 (96) | - | - | 0.97 | 0.99 |
   Est. | 0 | 0 | 0 | 0 | 5 | 0 | 1 | 54 | 54 (90) | 54 (90) |  |  |  |  |
   Early | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 79 | 79 (99) | 79 (99) |  |  |  |  |
   Control | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 79 | 79 (99) | 79 (99) |  |  |  |  |
PIP 3rd | 1 | 0 | 0 | 1 | 7 | 1 | 0 | 210 | 211 (96) | 211 (96) | 0.50 | 0.50 | 0.96 | 0.99 |
   Est. | 1 | 0 | 0 | 1 | 6 | 1 | 0 | 51 | 52 (87) | 52 (87) |  |  |  |  |
   Early | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 79 | 79 (99) | 79 (99) |  |  |  |  |
   Control | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 80 | 80 (100) | 80 (100) |  |  |  |  |
PIP 4th | 0 | 0 | 0 | 0 | 2 | 1 | 1 | 216 | 216 (98) | 216(98) | - | - | 0.99 | 0.99 |
   Est. | 0 | 0 | 0 | 0 | 2 | 0 | 1 | 57 | 57 (95) | 57 (95) |  |  |  |  |
   Early | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 79 | 79 (99) | 79 (99) |  |  |  |  |
   Control | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 80 | 80 (100) | 80 (100) |  |  |  |  |
PIP 5th | 0 | 0 | 0 | 0 | 1 | 0 | 4 | 215 | 215 (98) | 215(98) | - | - | 0.99 | 0.98 |
   Est. | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 58 | 58 (97) | 58(97) |  |  |  |  |
   Early | 0 | 0 | 0 | 0 | 1 | 0 | 2 | 77 | 77 (96) | 77(96) |  |  |  |  |
   Control | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 80 | 80 (100) | 80 (100) |  |  |  |  |
Total | 30 | 20 | 6 | 5 | 26 | 29 | 12 | 1,704 | 1,754 (96) | 1,740 (95) | 0.59 | 0.42 | 0.98 | 0.99 |
   Est. | 26 | 15 | 6 | 5 | 20 | 14 | 8 | 458 | 499 (90) | 490 (89) |  |  |  |  |
   Early | 4 | 5 | 0 | 0 | 6 | 5 | 3 | 617 | 626 (98) | 621 (97) |  |  |  |  |
   Control | 0 | 0 | 0 | 0 | 0 | 10 | 1 | 629 | 629 (98) | 629 (98) |  |  |  |  |