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. 2014 Oct 9;180(10):989–996. doi: 10.1093/aje/kwu225

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).