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Impact of Event Scale (IES) classification analysis employing a cut off score of 27.
| CAPS PTSD Diagnosis |
||||
|---|---|---|---|---|
| Present | Absent | Total | ||
| Positive | 90 | 37 | 127 | |
| IES | Negative | 9 | 93 | 102 |
| Total | 99 | 130 | 229 | |
Sensitivity = 91%
Specificity = 72%
Positive Predictive Power = 71%
Negative Predictive Power = 91%
False Positive Rate = 28%
False Negative Rate = 9%
Overall Correct Classification = 80%
Kappa = .60 (p < .001)
