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Characteristics of the sample
| Probable PTSD | ||
|---|---|---|
| Not Present (n = 7112) | Present (n = 213) | |
| Males % | 97.4% | 2.6% |
| Females % | 96.8% | 3.2% |
| Age, mean (SD) | 51.3 (18.5) | 42.9 (15.0) |
| Upper class N (%) | 2570 | 64 (2.2) |
| Middle class N (%) | 3724 | 124 (3.1) |
| Lower class N (%) | 354 | 6 (2.0) |
| White N (%) | 6575 | 191 (2.8) |
| Black N (%) | 180 | 8 (6.1) |
| Other ethnicities N (%) | 337 | 12 (2.2) |
