Table 1.
IES-Rb | Sensitivity | Specificity | PPV | NPV | LR+ | LR− | Efficiency |
DSM-IV PTSD (n = 8), AUC 95%, 95% CI, 88%-100% | |||||||
1.0 | 100 | 71 | 35 | 100 | 3.5 | 0.0 | 75 |
1.1 | 100 | 75 | 38 | 100 | 4.0 | 0.0 | 78 |
1.2 | 100 | 77 | 40 | 100 | 4.3 | 0.0 | 80 |
1.4 | 100 | 83 | 47 | 100 | 5.8 | 0.0 | 85 |
1.6 | 100 | 85 | 50 | 100 | 6.5 | 0.0 | 87 |
1.8 | 75 | 86 | 46 | 96 | 5.6 | 0.3 | 85 |
2.0 | 75 | 92 | 60 | 96 | 9.8 | 0.3 | 90 |
Partial PTSDc (1), n = 12, AUC 97%, 95% CI, 92%-100% | |||||||
1.0 | 100 | 77 | 52 | 100 | 4.4 | 0.0 | 82 |
1.1 | 100 | 81 | 57 | 100 | 5.3 | 0.0 | 85 |
1.2 | 100 | 83 | 60 | 100 | 6.0 | 0.0 | 87 |
1.4 | 92 | 88 | 65 | 98 | 7.3 | 0.1 | 83 |
1.6 | 92 | 90 | 69 | 98 | 8.8 | 0.1 | 90 |
1.8 | 75 | 92 | 69 | 94 | 9.0 | 0.3 | 88 |
2.0 | 66 | 96 | 80 | 92 | 16 | 0.4 | 90 |
Partial PTSD (2), n = 13, AUC 95%, 95% CI, 89%-100% | |||||||
1.0 | 92 | 76 | 52 | 97 | 3.9 | 0.1 | 80 |
1.1 | 92 | 81 | 57 | 97 | 4.8 | 0.1 | 83 |
1.2 | 92 | 83 | 60 | 98 | 5.4 | 0.1 | 85 |
1.4 | 85 | 87 | 65 | 95 | 6.6 | 0.2 | 87 |
1.6 | 85 | 89 | 69 | 95 | 8.0 | 0.2 | 88 |
1.8 | 69 | 91 | 69 | 91 | 8.1 | 0.3 | 87 |
2.0 | 66 | 96 | 80 | 92 | 16 | 0.4 | 90 |
Partial PTSD (3), n = 15, AUC 96%, 95% CI, 91%-100% | |||||||
1.0 | 100 | 82 | 65 | 100 | 5.6 | 0.0 | 87 |
1.1 | 93 | 84 | 67 | 97 | 6.0 | 0.1 | 87 |
1.2 | 93 | 87 | 70 | 98 | 7.0 | 0.1 | 88 |
1.4 | 87 | 91 | 76 | 95 | 9.8 | 0.2 | 90 |
1.6 | 80 | 91 | 75 | 93 | 9.0 | 0.2 | 88 |
1.8 | 67 | 93 | 77 | 89 | 10 | 0.4 | 87 |
2.0 | 53 | 96 | 80 | 86 | 12 | 0.5 | 85 |
Data given as % unless otherwise indicated. AUC = area under the receiver operating characteristics curve; DSM = Diagnostic and Statistical Manual of Mental Disorders; IES-R = Impact of Event Scale-Revised; LR− = likelihood ratio of a negative test result; LR+ = likelihood ratio of a positive test result; NPV = negative predictive value; PPV = positive predictive value; PTSD = posttraumatic stress disorder.
Assessed using the Clinician-Administered PTSD Scale.
IES-R total score (mean of all items).
Partial PTSD definitions: (1) symptoms met the DSM-IV B criterion (reexperiencing), as well as either the C (avoidance/numbing) or D (hyperarousal) criterion16; (2) symptoms met the B criterion, as well as one or more C and D symptom criteria25; (3) symptoms met at least two of three B, C, and D criteria.35