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Table 1 Sensitivities, specificities and accuracies for bone erosions of radiography and magnetic resonance imaging (MRI), with computed tomography (CT) as reference

From: Detection of bone erosions in rheumatoid arthritis wrist joints with magnetic resonance imaging, computed tomography and radiography

  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