Table 4

Inflammation on MRI in relation to tenderness at physical examination

	MCP joints
	Synovitis score			Tenosynovitis score			Bone 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 feature	51	15	1*	42	9	1*	36	15	8
Percentage of not tender joints with MRI feature	19	3	0*	15	4	0*	11	4	2
Given MRI inflammation, % of non-tender joints	56	40	0*	54	56	0*	49	44	43
	Wrists
	Synovitis score			Tenosynovitis score			Bone 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 feature	88	42	2*	83	41	5*	76	59	31
Percentage of not tender joints with MRI feature	46	22	1*	37	13	3*	50	17	7
Given MRI inflammation, % of non-tender joints	51	46	50*	48	38	50*	56	36	31
	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 feature	13	1*	n.ap.				20	13	9
Percentage of not tender joints with MRI feature	6	0*	n.ap.				10	4	2
Given MRI inflammation, % of non-tender joints	59	50*	n.ap.				62	49	45

*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.