Table 3

Sensitivity, specificity and accuracy of MRI and US for bone erosions in regions without radiographic erosions, with CT as the reference

MCP 2

MCP 3

MCP 4

MCP 5

Total

Proximal

Distal

Proximal

Distal

Proximal

Distal

Proximal

Distal


Quadrants with CT erosions

12

11

13

3

8

5

7

4

63

Quadrants with MRI erosions

12

6

16

0

7

2

7

1

51

Quadrants with US erosions

18

5

4

1

2

0

8

2

40

MRI sensitivity

75%

55%

85%

0%

88%

40%

71%

25%

65%

MRI specificity

87%

100%

83%

100%

100%

100%

94%

100%

96%

MRI accuracy

83%

86%

83%

93%

98%

93%

90%

93%

90%

US sensitivity

92%

0%

8%

0%

25%

0%

57%

25%

30%

US specificity

70%

79%

90%

97%

100%

100%

88%

97%

92%

US accuracy

77%

54%

64%

90%

85%

88%

83%

90%

80%


320 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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