Table 2 HFO area and seizure outcome.

From: Resection of high frequency oscillations predicts seizure outcome in the individual patient

 

Ripple

FR

FRandR

Specificity [%] specificity = TN/(TN + FP)

54

69

100

Sensitivity [%] sensitivity = TP/(TP + FN)

43

29

57

Negative Predictive Value NPV [%] NPV = TN/(TN + FN)

64

64

81

Positive Predictive Value PPV [%] PPV = TP/(TP + FP)

33

33

100

Accuracy [%] accuracy = (TP + TN)/N

50

55

85

  1. Defining the HFO area by FR co-occurring with ripples was more specific in predicting seizure freedom than FR and ripples separately. False Negative cases may reflect the limited coverage of the implanted electrodes. Abbreviations: FN = False Negative; FP = False Positive; FR = fast ripple; FRandR = FR co-occurring with ripple; NPV = Negative Predictive Value; PPV = Positive Predictive Value; TN = True Negative; TP = True Positive; N = number of patients.
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