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

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.

Szkudlarek et al. Arthritis Research & Therapy 2006 8:R52   doi:10.1186/ar1904