Table 1.
Twin Characteristics by History of PTSD, Emory Twins Study, 2002–2010
| Characteristic | Total No. of Subjects | No PTSD (n = 405) |
PTSD (n = 60) |
||
|---|---|---|---|---|---|
| % | Mean (SD) | % | Mean (SD) | ||
| Demographic factors | |||||
| Age, years | 465 | 55.1 (3.1) | 57.1 (2.2) | ||
| Did not complete high school | 465 | 27.9 | 30.0 | ||
| Behavioral factors | |||||
| No. of alcoholic drinks per week | 463 | 4.6 (8.3) | 7.9 (12.8) | ||
| Baecke score | 462 | 7.4 (1.7) | 7.3 (2.0) | ||
| Smoking status | |||||
| Current smoker | 465 | 21.7 | 36.7 | ||
| Past smoker | 464 | 41.9 | 35.0 | ||
| Never smoker | 464 | 36.4 | 28.3 | ||
| Cardiovascular factors | |||||
| Systolic blood pressure | 465 | 129.7 (15.6) | 132.7 (15.4) | ||
| HDL cholesterol | 465 | 40.2 (22.2) | 40.4 (11.8) | ||
| Diabetes | 465 | 9.6 | 10.0 | ||
| Hypertension | 465 | 33.7 | 43.3 | ||
| Body mass indexa | 464 | 29.3 (4.8) | 29.8 (4.8) | ||
| Psychiatric comorbidity | |||||
| History of depression | 463 | 20.6 | 56.7 | ||
| Military service | |||||
| Combat exposure scoreb | 465 | 0 (5) | 16.0 (9.5) | ||
| In Vietnam Theater | 465 | 39.0 | 91.0 | ||
Abbreviations: HDL, high-density lipoprotein; PTSD, posttraumatic stress disorder; SD, standard deviation.
a Weight (kg)/height (m)2.
b Values are expressed as median (interquartile range).