|
Joint
|
Joints with signs of synovitis
| | |
Joints with no signs of synovitis on US or MRI
|
Number of joints examined
|
Agreement: US versus MRI (%)
|
|---|
| |
US + MRI
|
US only
|
MRI only
| | | |
|---|
|
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)
|
- All study participants included. early, early rheumatoid arthritis; Est., established rheumatoid arthritis; MCP, metacarpophalangeal joint; MRI, magnetic resonance imaging; PIP, proximal interphalangeal joint; US, ultrasonography.
