Table 1.
Characteristics of Emory Twin Study participants, according to lifetime history of PTSD
| Characteristic | N | No PTSD | PTSD | P* |
|---|---|---|---|---|
| Demographics | ||||
| Mean age (SD), years | 476 | 55.1 (3.2) | 57.4 (2.0) | <0.001 |
| % married | 466 | 98.1% | 96.6% | 0.358 |
| % high school graduate | 476 | 72.4% | 64.4% | 0.202 |
| Behaviors | ||||
| Mean no. of drinks per week (SD) | 473 | 4.6 (8.4) | 8.6 (12.8) | 0.002 |
| Mean Baecke physical activity score (SD) | 474 | 7.4 (1.7) | 7.3 (1.9) | 0.668 |
| % smoking | 475 | 0.021 | ||
| % current smoking | 21.2% | 37.3% | ||
| % past smoking | 43.5% | 32.2% | ||
| Medications | ||||
| % on aspirin | 476 | 19.9% | 20.3% | 0.938 |
| % on statins | 476 | 20.9% | 15.3% | 0.315 |
| Cardiovascular risk factors | ||||
| Mean BMI | 475 | 29.4 (4.9) | 29.9 (4.4) | 0.462 |
| % with diabetes | 476 | 8.6% | 8.5% | 0.968 |
| % with hypertension | 476 | 45.8% | 64.4% | 0.007 |
| Psychiatric conditions | ||||
| % with history of depression | 474 | 20.0% | 54.2% | <0.001 |
| Military service | ||||
| % in Vietnam theater | 476 | 39.6% | 86.4% | <0.001 |
| % with combat exposure | 476 | 29.3% | 86.4% | <0.001 |
*
By t test (continuous variables) and χ2 or Fisher’s exact test (categorical variables).