Table 1

Demographic, psychiatric and behavioral variables.

PTSD

CEC

HC

Variable

Mean

SD

Mean

SD

Mean

SD

F-statistic

p

Age

32.3

6.9

28.7

4.5

27.3

6.2

2.193

0.128

Education

13.9

1.7

13.8

2.2

13.5

2.0

0.065

0.938

Ethnicity (n)

Caucasian

6

10

5

χ² = 6.20

0.185

Hispanic

3

2

5

Black

3

0

2

CTQ

39.8

5.4

42.6

6.5

-

-

0.858

0.371

CES

22.7

7.2

19.1

9.9

-

-

0.623

0.444

BDI

14.6

9.5

5.5

5.9

-

-

5.083

0.042

CAPS-B^a

19.0

7.3

3.9

6.9

-

-

20.194

< 0.001

CAPS-C

25.8

5.3

4.8

8.0

-

-

40.163

< 0.001

CAPS-D

25.0

3.9

11.0

8.4

-

-

18.584

< 0.001

CAPS Total

69.8

13.2

19.7

22.2

-

-

31.497

< 0.001

Task reaction time (ms)

70.974^b

< 0.001^b

Shape

1029

317

965

278

919

188

1.146^c

0.384^c

Angry

1458

435

1470

455

1347

251

Fear

1652

369

1625

532

1395

336

Happy

1257

289

1185

336

1009

161

^a CAPS was measured in eight out of twelve of the PTSD group and ten out of twelve of the CEC group; ^btask effect; ^cgroup effect. BDI = Beck Depression Inventory; CAPS = Clinician-Administered PTSD Scale; CEC = combat exposed control; CES = Combat Exposure Scale; CTQ = Childhood Trauma Questionnaire; HC = healthy control; PTSD = post traumatic stress disorder.

Simmons et al. Biology of Mood & Anxiety Disorders 2011 1:6   doi:10.1186/2045-5380-1-6