Table 3

Inflammation on MRI in relation to joint swelling 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 swollen joints with MRI feature73252*65182*502313
Percentage of not swollen joints with MRI feature1820*1330*1032
Given MRI inflammation, % of non-swollen joints57320*54440*534239
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 swollen joints with MRI feature83484*78487*755532
Percentage of not swollen joints with MRI feature50100*41112*51207
Given MRI inflammation, % of non-swollen joints58330*543333*604535
MTP joints†
Synovitis score Bone marrow oedema score
(n=)≥1 (63)≥2 (4)≥3 (0)≥1 (105)≥2 (49)≥3 (31)
Percentage of swollen joints with MRI feature211*n.ap.231713
Percentage of not swollen joints with MRI feature50*n.ap.1142
Given MRI inflammation, % of non-swollen joints6775*n.ap.786558
  • *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.