Table 4

Inflammation on MRI in relation to tenderness at physical examination

MCP joints
Synovitis scoreTenosynovitis scoreBone marrow oedema score
(n=)≥1 (187)≥2 (40)≥3 (2)≥1 (145)≥2 (34)≥3 (2)≥1 (116)≥2 (43)≥3 (23)
Percentage of tender joints with MRI feature51151*4291*36158
Percentage of not tender joints with MRI feature1930*1540*1142
Given MRI inflammation, % of non-tender joints56400*54560*494443
Wrists
Synovitis scoreTenosynovitis scoreBone marrow oedema score
(n=)≥1 (107)≥2 (39)≥3 (2)≥1 (92)≥2 (39)≥3 (6)≥1 (101)≥2 (53)≥3 (26)
Percentage of tender joints with MRI feature88422*83415*765931
Percentage of not tender joints with MRI feature46221*37133*50177
Given MRI inflammation, % of non-tender joints514650*483850*563631
MTP joints†
Synovitis score Bone marrow oedema score
(n=)≥1 (63)≥2 (4)≥3 (0)  ≥1 (105)≥2 (49)≥3 (31)
Percentage of tender joints with MRI feature131*n.ap.  20139
Percentage of not tender joints with MRI feature60*n.ap.  1042
Given MRI inflammation, % of non-tender joints5950*n.ap.  624945
  • *These frequencies should be interpreted with discretion, because of the low numbers of joints with these scores.

  • †It was not possible to score tenosynovitis of the MTPs, because here no right-angled (coronal planes) MR-images were available.

  • n.ap., not applicable because n=0.