Table 2.
Indices Evaluating Predictions of Response Using Log Alpha Power and Log Alpha Asymmetry at Occipital Sites
| Alpha Power | Alpha Asymmetry | Combined | |
|---|---|---|---|
| Sensitivity a | 72.7 | 63.6 | 83.3 |
| Specificity b | 57.5 | 71.4 | 67.7 |
| Positive predictive value c | 72.7 | 77.8 | 71.4 |
| Negative predictive value d | 57.1 | 55.6 | 80.0 |
a
Sensitivity = percentage of responders who were predicted to be responders.
b
Specificity = percentage of nonresponders who were predicted to be nonresponders.
c
Positive predictive value = response rate for patients who were predicted to be responders.
d
Negative predictive value = nonresponse rate for patients who were predicted to be nonresponders.