Skip to main content

Table 5 Diagnostic accuracy of SMG in tested patients with ACR grade A/B versus the result of biopsy or follow-up as the gold standard for lesion classification

From: Contrast-enhanced spectral mammography: successful initial clinical institute experience

Lesion classification by SMG

Final diagnosis

 

Malignant

Benign

Total

Probably malignant (BIRADS 4–6)

33

7

40

Probably benign (BIRADS 1–3)

3

6

9

Total

36

13

49

Statistic

Value

Lower bound (95%)

Upper bound (95%)

Correct classification

80%

68%

91%

Misclassification

20%

9%

32%

Sensitivity

92%

77%

98%

Specificity

46%

23%

71%

False positive rate

54%

30%

78%

False negative rate

8%

0%

17%

Prevalence

73%

61%

86%

Positive predictive value (PPV)

83%

71%

94%

Negative predictive value (NPV)

67%

36%

97%

Positive likelihood ratio (LR+)

1.70

1.02

2.84

Negative likelihood ratio (LR−)

0.18

0.05

0.62

Relative risk

2.48

1.06

5.76

Odds ratio

9.43

2.06

43.18

  1. Data in cross-tables are counts