Table 2. Predictive Value of T1 Diagnoses for T3 Diagnoses, by informant and diagnostic algorithm.
| T1 Diagnosis | T3 Diagnosis | Positive Predictive Value | Negative Predictive Value | Sensitivity | Specificity | Diagnoses Identified Correctly |
|---|---|---|---|---|---|---|
| Parent-report a | ||||||
| PTSD-AA | PTSD-AA | 12.5 | 98.4 | 50.0 | 89.9 | 88.7% |
| ASD | PTSD | 50.0 | 100.0 | 100.0 | 98.6 | 98.6% |
| Child-report b | ||||||
| PTSD-AA | PTSD-AA | 33.3 | 94.4 | 75.0 | 73.9 | 74.1% |
| ASD | PTSD | 0.0 | 89.5 | 0.0 | 68.0 | 63.0% |
| Combined-report b | ||||||
| PTSD-AA | PTSD-AA | 28.6 | 92.3 | 80.0 | 54.5 | 59.3% |
| ASD | PTSD | 11.1 | 88.9 | 33.3 | 66.7 | 63.0% |
| Parent- to child-report c | ||||||
| PTSD-AA | PTSD-AA | 25.0 | 84.4 | 22.2 | 86.4 | 75.5% |
| ASD | PTSD | 0.0 | 92.2 | 0.0 | 96.0 | 88.7% |
| Optimal report d | ||||||
| PTSD-AA | PTSD-AA | 35.3 | 88.9 | 50.0 | 81.4 | 76.1% |
| ASD | PTSD | 10.0 | 93.4 | 20.0 | 86.4 | 81.7% |
Note. T1 = 2-4 weeks post-trauma; T3 = three years post-trauma; PTSD = posttraumatic stress disorder; PTSD-AA = PTSD, alternative algorithm; ASD = Acute stress disorder; Combined report = derived from both parent and child responses, where both are available; Optimal report = derived from parent-only responses for children under seven, or combined-report for children seven years or older.
a
n=71.
b
n=27.
c
i.e. Parent-report diagnoses at T1 as a predictor of child-report diagnoses at Time 3, n=53.
d
n=71.