Table 2

Sensitivity, specificity and accuracy of radiography, MRI and US for bone erosions, with CT as reference

MCP 2

MCP 3

MCP 4

MCP 5

Total

Proximal

Distal

Proximal

Distal

Proximal

Distal

Proximal

Distal


Quadrants with CT erosions

18

18

13

3

9

5

8

4

78

Quadrants with radiographic erosions

7

7

0

0

1

0

1

0

16

Quadrants with MRI erosions

19

11

16

0

7

2

8

1

64

Quadrants with US erosions

25

11

4

1

3

0

9

2

55

Radiography sensitivity

33%

39%

0%

0%

11%

0%

13%

0%

19%

Radiography specificity

96%

100%

100%

100%

100%

100%

100%

100%

100%

Radiography accuracy

69%

74%

69%

93%

81%

88%

83%

90%

81%

MRI sensitivity

83%

61%

85%

0%

78%

40%

75%

25%

68%

MRI specificity

83%

100%

83%

100%

100%

100%

94%

100%

96%

MRI accuracy

83%

83%

83%

93%

95%

93%

90%

93%

89%

US sensitivity

94%

33%

8%

0%

33%

0%

63%

25%

42%

US specificity

67%

79%

90%

97%

100%

100%

88%

97%

91%

US accuracy

79%

59%

64%

90%

86%

88%

83%

90%

80%


In total, 336 MCP joint quadrants were evaluated. CT, computed tomography; MCP, metacarpophalangeal joint; MRI, magnetic resonance imaging; US, ultrasonography.

Døhn et al. Arthritis Research & Therapy 2006 8:R110   doi:10.1186/ar1995

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