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Table 2 Sensitivity, specificity, PPV, and Youden’s Index for cut-off values and morphological criteria by CT and MRI

From: Accuracy of various criteria for lymph node staging in ductal adenocarcinoma of the pancreatic head by computed tomography and magnetic resonance imaging

  Sensitivity Specificity PPV Youden’s Index
CT
Size, cut-off value
  4 mm 95.3% 0% 70.7% − 0.05
  5 mm 95.3% 0% 70.7% − 0.05
  6 mm 90.7% 11.7% 72.2% − 0.02
  7 mm 83.7% 17.6% 72.0% 0.01
  8 mm 67.4% 41.2% 74.4% 0.08
  9 mm 51.1% 58.8% 75.9% 0.10
  10 mm 44.2% 82.4% 86.4% 0.27
  11 mm 34.9% 88.2% 88.2% 0.23
Morphological criterion
  Lobulated 62.7% 52.9% 77.1% 0.16
  Spiculated 11.6% 88.2% 71.4% − 0.00
  Indistinct 2.3% 94.1% 50.0% − 0.04
  Inhomogeneous 25.6% 94.1% 91.7% 0.20
MRI
Size, cut-off value
  7 mm 75.0% 0% 60.0% − 0.25
  8 mm 58.3% 83.3% 87.5% 0.42
  9 mm 58.3% 66.7% 77.8% 0.25
  10 mm 58.3% 83.3% 87.5% 0.42
  11 mm 25.0% 83.3% 75.0% 0.08
  12 mm 16.7% 83.3% 66.7% 0.00
  13 mm 16.7% 83.3% 66.7% 0.00
  14 mm 8.3% 83.3% 50.0% − 0.08
  15 mm 8.3% 83.3% 50.0% − 0.08
Morphological criterion
  Lobulated 16.7% 66.7% 50.% − 0.17
  Spiculated 8.3% 100% 35.3% 0.08
  Indistinct Not visible
  Inhomogeneous Not visible