Table 2.
Hierarchical multiple regression of the eight single items of the PTSD-8 with the Harvard Trauma Questionnaire total score as the dependent variable across the three samples.
| Sample 1 Whiplash | Sample 2 Rape | Sample 3 Explosion Disaster | |||||
|---|---|---|---|---|---|---|---|
| PTSD-8 item | Sub-scale | Beta* | 95% CI of beta | Beta* | 95% CI of beta | Beta* | 95% CI of beta |
| 1. Intrusive recollection (B1) | I | .08 | (0.57-1.24) | .14 | (1.08-2.57) | .14 | (1.05-2.11) |
| 2. Event recurring (B2) | I | .09 | (0.62-1.31) | .08 | (0.35-1.66) | .07 | (0.24-1.27) |
| 3. Recurrent dreams (B3) | I | .16 | (1.59-2.23) | .24 | (1.90-2.92) | .15 | (1.50-2.70) |
| 4. Psychological and physiological distress (B4/5) | I | .14 | (1.03-1.60) | .16 | (1.03-2.20) | .13 | (0.78-1.68) |
| 5. Efforts to avoid activities (C1) | A | .13 | (0.85-1.31) | .20 | (1.30-2.23) | .13 | (0.64-1.35) |
| 6. Efforts to avoid thoughts (C2) | A | .24 | (1.80-2.27) | .16 | (1.13-2.15) | .17 | (1.35-2.28) |
| 7. Exaggerated startle response (D4) | H | .19 | (1.38-1.85) | .19 | (1.34-2.36) | .22 | (1.50-2.34) |
| 8. Hypervigilance (D5) | H | .27 | (2.10-2.58) | .17 | (1.22-2.36) | .28 | (2.11-3.01) |
*
Note: p < .001 for all presented betas.
Sample: 1 = whiplash (adj. R2 = .80), 2 = rape (adj. R2 = .87), 3 = explosion disaster (adj. R2 = .84).
I = intrusion, A = avoidance, H = hypervigilance.