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Table 9 Agreement (sensitivity, specificity, and accuracy) for the three imaging sets

From: The role of combined diffusion weighted imaging and magnetic resonance cholangiopancreatography in the differential diagnosis of obstructive biliary disorders

 

Benign (n = 34)

Malignant (n = 26)

Sensitivity

Specificity

PPV

NPV

Accuracy

No.

%

No.

%

MRCP

 Benign

30

88.2

3

11.5

88.46

88.24

85.19

90.91

88.33

 Malignant

4

11.8

23

88.5

 χ2 (p)

35.017* (< 0.001*)

     

DWI

 Benign

34

100.0

2

7.7

92.31

100.0

100.0

94.44

96.67

 Malignant

0

0.0

24

92.3

 χ2 (p)

52.308* (< 0.001*)

     

Combined MRCP and DWI

 Benign

34

100.0

1

3.8

96.15

100.0

100.0

97.14

98.33

 Malignant

0

0.0

25

96.2

 χ2 (p)

56.044* (< 0.001*)

     
  1. * Statistically significant at p ≤ 0.05