Table 1

Sensitivities, specificities and accuracies for bone erosions of radiography and magnetic resonance imaging (MRI), with computed tomography (CT) as reference

Bones with erosions (number of erosions)

Radiography

MRI

MRI values in bones without radiographic erosions (n = 277)

CT

Radiography

MRI

Sensitivity (%)

Specificity (%)

Accuracy (%)

Sensitivity (%)

Specificity (%)

Accuracy (%)

Sensitivity (%)

Specificity (%)

Accuracy (%)

Radius

10 (11)

2 (3)

6 (8)

20

100

62

60

100

81

50

100

79

Ulna

15 (15)

2 (2)

14 (15)

13

100

38

93

100

95

92

100

95

Scaphoid

11 (14)

3 (3)

8 (8)

27

100

62

64

90

76

50

90

72

Lunate

10 (11)

3 (3)

11 (14)

30

100

67

90

82

86

86

82

83

Triquetrum

14 (17)

5 (5)

13 (16)

36

100

57

86

86

86

100

86

94

Pisiforme

8 (8)

4 (5)

1 (1)

38

92

71

13

100

67

20

100

76

Trapezium

8 (8)

3 (5)

3 (3)

25

92

67

38

100

76

33

100

78

Trapezoid

8 (10)

2 (2)

9 (9)

25

100

71

86

85

86

83

85

84

Capitate

14 (14)

1 (1)

12 (16)

7

100

38

71

71

71

69

71

70

Hamate

9 (10)

3 (4)

7 (8)

33

100

71

56

83

71

50

85

71

Metacarpal base 1

8 (9)

3 (3)

5 (5)

38

100

76

63

100

86

40

100

83

Metacarpal base 2

16 (19)

1 (1)

9 (10)

6

100

29

56

100

67

53

100

65

Metacarpal base 3

5 (5)

1 (1)

2 (2)

20

100

81

20

94

76

25

94

80

Metacarpal base 4

8 (8)

3 (3)

2 (2)

38

100

76

25

100

71

20

100

78

Metacarpal base 5

7 (7)

2 (2)

2 (2)

29

100

76

14

93

67

20

93

74

Total

151 (166)

38 (43)

104 (119)

24

99

63

61

93

77

59

93

79

Døhn et al. Arthritis Research & Therapy 2008 10:R25   doi:10.1186/ar2378