Table 5 Summary of advantages and potential measurement errors of selected self-report instrument of PTSD symptoms
Tool | DTS | IES | PSS-SR | PTCS | SRIP | TES-B |
|---|---|---|---|---|---|---|
No. of items | 17 | 15 | 17 | 15 | 22 | 17 |
Response scale | 5 point Likert | 4 point Likert | 4-point Likert | 5-point Likert | 4 point Likert | 4 point Likert |
Validity | ||||||
- Sensitivity | 0.69 | 1.00 | 0.62 | Not yet | 0.86 | Not yet |
- Specificity | 0.95(cut-off of 40on sum score) | 0.78(cut-off of 19on sum score) | 1.00 | established | 0.71 | established |
Reliability | ||||||
- Internal consistency | 0.99 | 0.78 (intrusions)0.82 (avoidance) | 0.91 | 0.93 | 0.90-0.94 | 0.84 |
- Test-retest | 0.86 | 0.89 (intrusions) 0.79 (avoidance) | 0.74 | -- | 0.60-0.97 | -- |
Reporting period | Past week | Past week | Past two weeks | Not available | Past four weeks | Past four weeks |
Specify stressor of interest | Yes | Yes | Yes | Not available | No | Yes |
DSM-IV criteria | B, C, D | B, C | B, C, D | Not available | B, C, D | A, B, C, D, E, F |