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Table 2 Sensitivity (Sens), specificity (Spec), accuracy, PPV, and NPV of PET/CT in initial staging in 21 malignant melanoma cases

From: PET/CT in restaging, prognosis, and recurrence in patients with malignant melanoma

  Malignant melanoma Chi-square
TP TN FP FN Total χ2 FEP value
PET/CT n 15 3 2 1 21 5.915* 0.041*
% 71.42 14.38 9.52 4.78 100
ROC PET/CT Sens Spec PPV NPV Accuracy  
93.33 60 88.23 75 85.71
  1. TP true +ve, FN false −ve, TN true –ve, FP false +ve, PPV positive predictive value, NPV negative predictive value, χ2 chi-square test, FE Fisher Exact, P P value for comparing between the two studied groups
  2. *Significant