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Table 2 Sensitivity, specificity, positive predictive value, negative predictive value, accuracy and confidence intervals for different MRI parameters

From: Contribution of advanced neuro-imaging (MR diffusion, perfusion and proton spectroscopy) in differentiation between low grade gliomas GII and MR morphologically similar non neoplastic lesions

Parameter AUC (95% CI) Cut off point Sensitivity% Specificity% PPV
%
NPV
%
Accuracy
%
ADC 0.508 (0.321–0.695) ≤ 1.125 59.3 66.7 80.0 42.1 61.5
rCBV 0.875 (0.756–0.994) ≥ 0.93 85.2 83.3 92.0 71.4 84.6
Cho/Cr 0.704 (0.536–0.871) ≥ 1.97 77.8 66.7 84.0 57.1 74.4
Cho/NAA 0.829 (0.682–0.976) ≥ 2.5 85.2 83.3 92.0 71.4 84.6
NAA/Cr 0.799 (0.651–0.948) ≤ 0.79 77.8 91.7 95.5 64.7 82.1
  1. The cut of value and the important numbers are also in bold