Table 4.
Sensitivity, specificity, overall correct classification, and kappa values for various cutoff points for the Impact of Event Scale (IES).
| Cutoff | Sensitivity | Specificity | Overall Correct | Kappa (α) |
|---|---|---|---|---|
| 12 | 1.00 | .45 | .69 | .42 |
| 13 | .98 | .48 | .69 | .42 |
| 14 | .96 | .51 | .70 | .44 |
| 15 | .95 | .54 | .72 | .46 |
| 16 | .95 | .56 | .73 | .48 |
| 17 | .94 | .57 | .73 | .48 |
| 18 | .94 | .59 | .74 | .50 |
| 19 | .94 | .61 | .75 | .52 |
| 20 | .94 | .62 | .76 | .54 |
| 21 | .94 | .65 | .77 | .56 |
| 22 | .93 | .65 | .77 | .56 |
| 23 | .93 | .67 | .78 | .57 |
| 24 | .92 | .68 | .78 | .57 |
| 25 | .92 | .68 | .79 | .53 |
| 26 | .91 | .72 | .80 | .60 |
| 27 | .91 | .72 | .80 | .60 |
| 28 | .88 | .72 | .79 | .58 |
| 29 | .87 | .73 | .79 | .58 |
| 30 | .85 | .73 | .78 | .57 |
| 31 | .85 | .75 | .79 | .58 |
| 32 | .82 | .75 | .78 | .55 |
| 33 | .80 | .75 | .77 | .54 |