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Sensitivity, specificity, positive and negative predictive values, and diagnostic accuracy of US and MRI in the surgically proven cases

Sensitivity %Specificity %PPV %NPV %Accuracy %
For post-ganglionic injury
    US84 (66/78)100 (52/52)100 (66/66)81 (52/64)90 (118/130)
    MRI100 (78/78)100 (52/52)100 (78/78)100 (52/52)100 (130/130)
For pre-ganglionic injury
    MRI84 (37/44)96 (83/86)92 (37/40)92 (83/90)92 (120/130)
  • Note:—PPV indicates positive predictive value; NPV, negative predictive value.