Table 2.
Concordance of CIDI/DSM‐IV PTSD symptoms with K‐SADS ratings in the NCS‐A clinical reappraisal sample (n = 347)
| Prevalence | Concordancea | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| K‐SADS | CIDI | SN | SP | PPV | NPV | Kappa | AUC | ||||||||
| Percent | (SE) | Percent | (SE) | χ 2 | Est | (SE) | Est | (SE) | Est | (SE) | Est | (se) | Est | ||
| Criterion A: Traumatic event and fear response | 12.1 | (1.9) | 10.9 | (1.7) | 0.4 | 43.3 | (7.8) | 93.6 | (1.4) | 48.1 | (8.0) | 92.3 | (1.7) | 0.39 | 0.68 |
| Criterion B: Re‐experiencing | 11.1 | (1.8) | 8.1 | (1.5) | 2.2 | 32.5 | (7.4) | 94.9 | (1.3) | 44.4 | (9.3) | 91.9 | (1.6) | 0.31 | 0.64 |
| Criterion C: Avoidance/numbing | 5.4 | (1.2) | 6.2 | (1.2) | 0.3 | 43.0 | (10.1) | 95.9 | (1.2) | 37.6 | (8.8) | 96.7 | (1.1) | 0.36 | 0.69 |
| Criterion D: Hyperarousal | 6.2 | (1.2) | 8.0 | (1.5) | 1.0 | 45.9 | (9.8) | 94.5 | (1.4) | 35.3 | (8.3) | 96.4 | (1.1) | 0.35 | 0.70 |
| Criterion E: Duration > one month | 10.9 | (1.7) | 7.1 | (1.3) | 4.5* | 34.5 | (7.6) | 96.3 | (1.0) | 52.9 | (9.6) | 92.3 | (1.6) | 0.36 | 0.65 |
| Criterion F: Impairment | 8.8 | (1.5) | 6.8 | (1.4) | 1.1 | 31.0 | (7.2) | 95.5 | (1.3) | 40.2 | (9.4) | 93.5 | (1.4) | 0.30 | 0.63 |
| Overall diagnosis: (A, B, C, D, E, F) | 4.2 | (1.2) | 3.8 | (1.0) | 0.2 | 46.8 | (14.2) | 98.1 | (0.8) | 51.8 | (14.1) | 97.7 | (1.0) | 0.47 | 0.72 |
| Modified diagnosis b | 4.2 | (1.2) | 4.4 | (1.0) | 0.0 | 59.9 | (14.2) | 98.0 | (0.8) | 57.0 | (12.7) | 98.2 | (0.9) | 0.56 | 0.79 |
SN, sensitivity; SP, specificity; PPV, positive predictive value; NPV, negative predictive value; Kappa, Cohen's Kappa; AUC, area under the receiver operating characteristic curve.
The modified PTSD diagnosis requires respondents to either meet all six DSM‐IV criteria (A–F) or, if they met A and E (traumatic event/fear response and one month duration), but failed to meet one of the other DSM‐IV criteria, they were required to have a combined total of nine symptoms distributed in any way across Criteria B, C, and D (rather than the minimum of six required by the DSM‐IV).
The prevalence estimate based on the CIDI differs significantly from the estimate based on the K‐SADS at 0.05 level, two‐sided test.