Table 3 Numbers of joints with and without signs of synovitis in finger joints, stratified by imaging modality and combinations thereof
Joint | Joints with signs of synovitis | Â | Â | Joints with no signs of synovitis on US or MRI | Number of joints examined | Agreement: US versus MRI (%) |
|---|---|---|---|---|---|---|
| Â | US + MRI | US only | MRI only | Â | Â | Â |
MCP 2nd | 26 | 6 | 7 | 20 | 59 | 46 (78) |
   Est. | 12 | 3 | 2 | 3 | 20 | 15 (75) |
   Early | 14 | 2 | 0 | 3 | 19 | 17 (89) |
   Control | 0 | 1 | 5 | 14 | 20 | 14 (70) |
MCP 3rd | 21 | 7 | 9 | 22 | 59 | 43 (73) |
   Est. | 11 | 2 | 2 | 5 | 20 | 16 (80) |
   Early | 10 | 4 | 2 | 3 | 19 | 13 (68) |
   Control | 0 | 1 | 5 | 14 | 20 | 14 (70) |
MCP 4th | 11 | 7 | 3 | 37 | 58 | 48 (83) |
   Est. | 6 | 2 | 2 | 9 | 19 | 15 (79) |
   Early | 5 | 4 | 0 | 10 | 19 | 15 (79) |
   Control | 0 | 1 | 1 | 18 | 20 | 18 (90) |
MCP 5th | 11 | 12 | 3 | 32 | 58 | 43 (74) |
   Est. | 6 | 5 | 1 | 7 | 19 | 13 (68) |
   Early | 5 | 7 | 0 | 7 | 19 | 12 (63) |
   Control | 0 | 0 | 2 | 18 | 20 | 18 (90) |
PIP 2nd | 12 | 9 | 6 | 23 | 50 | 35 (70) |
   Est. | 6 | 3 | 3 | 2 | 14 | 8 (57) |
   Early | 6 | 5 | 1 | 5 | 17 | 11 (65) |
   Control | 0 | 1 | 2 | 16 | 19 | 16 (84) |
PIP 3rd | 14 | 4 | 5 | 27 | 50 | 41 (82) |
   Est. | 6 | 1 | 3 | 4 | 14 | 10 (71) |
   Early | 7 | 3 | 0 | 7 | 17 | 14 (82) |
   Control | 1 | 0 | 2 | 16 | 19 | 17 (89) |
PIP 4th | 10 | 5 | 4 | 31 | 50 | 41 (82) |
   Est. | 5 | 1 | 3 | 5 | 14 | 10 (71) |
   Early | 5 | 4 | 0 | 8 | 17 | 13 (76) |
   Control | 0 | 0 | 1 | 18 | 19 | 18 (95) |
PIP 5th | 2 | 9 | 6 | 32 | 49 | 34 (69) |
   Est. | 1 | 3 | 4 | 6 | 14 | 7 (50) |
   Early | 1 | 6 | 1 | 8 | 16 | 9 (56) |
   Control | 0 | 0 | 1 | 18 | 19 | 18 (95) |
Total | 107 | 59 | 43 | 224 | 433 | 331 (76) |
   Est. | 53 | 20 | 20 | 41 | 134 | 94 (70) |
   Early | 53 | 35 | 4 | 51 | 143 | 104 (73) |
   Control | 1 | 4 | 19 | 132 | 156 | 133 (85) |