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Table 1 Performance of new and exisiting classification / diagnostic criteria for idiopathic inflammatory myopathies

From: Progress report on development of classification criteria for adult and juvenile idiopathic inflammatory myopathies

Performance (%)

New classification criteriaa

Peter & Bohan [1]b

Tanimoto et al. [2]

Targoff et al. [3]b

Dalakas & Hohlfeld [4]b

Hoogendijk et al. [5]b

 

Without muscle biopsy data

With muscle biopsy data

     

Sensitivity

91

94

98

96

93

6

51

Specificity

82

85

55

31

88

99

96

Correctly classified

88

91

86

79

91

45

70

  1. a Cut point for probability: 55%
  2. b Definite and probable polymyositis and dermatomyositis