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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