TABLE 1. Psychometric Ratings and Volumes of the Hippocampus and Amygdala at 1 Week and 6 Months in Survivors of Traumatic Events Who Did or Did Not Have PTSD at 6 Months.
| 1 Week | 6 Months | |||||||
|---|---|---|---|---|---|---|---|---|
| Non-PTSD (N=27) | PTSD (N=10) | Non-PTSD (N=27) | PTSD (N=10) | |||||
| Measure | Mean | SD | Mean | SD | Mean | SD | Mean | SD |
| Scores on psychometric testsa | ||||||||
| Spielberger State-Trait Anxiety Inventory, state version | 48.50 | 12.05 | 55.00 | 12.66 | 46.80 | 4.20 | 50.75b | 5.60 |
| Impact of Event Scale—Revised | 54.30 | 21.58 | 67.63 | 16.57 | 26.35 | 17.56 | 56.75b | 18.99 |
| Mississippi Scale for Combat-Related PTSD—civilian version | — | — | — | — | 73.21 | 17.81 | 110.80b | 15.24 |
| Clinician-Administered PTSD Scale total | — | — | — | — | 12.35 | 13.71 | 57.90b | 17.85 |
| Brain volumes (ml) | ||||||||
| Total cranial cavity | 1414 | 173 | 1414 | 154 | 1417 | 183 | 1411 | 169 |
| Hippocampus | ||||||||
| Left | 3.80 | 0.49 | 3.91 | 0.43 | 3.81 | 0.54 | 3.93 | 0.54 |
| Right | 3.84 | 0.42 | 3.95 | 0.42 | 3.94 | 0.33 | 3.98 | 0.42 |
| Amygdala | ||||||||
| Left | 2.15 | 0.43 | 1.91 | 0.43 | 2.15 | 0.43 | 1.97 | 0.36 |
| Right | 2.41 | 0.48 | 2.29 | 0.48 | 2.47 | 0.49 | 2.26 | 0.46 |
a
Higher scores indicate higher symptom levels.
b
Significant difference between groups (p<0.005, two-tailed t test).