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Table 1 Demographic, psychiatric and behavioral variables.

From: Altered amygdala activation during face processing in Iraqi and Afghanistani war veterans

  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)     70.974b < 0.001b
Shape 1029 317 965 278 919 188 1.146c 0.384c
Angry 1458 435 1470 455 1347 251   
Fear 1652 369 1625 532 1395 336   
Happy 1257 289 1185 336 1009 161   
  1. 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.