Table 1 Cognitive ability score by total population, pre-deployment factors, deployment-related factors and level of post-deployment PTSD symptoms in 9695 Danish Army military personnel.
Cognitive ability scorea by variables recorded at conscription (pre-deployment factors)nbMean (s.d.)
Total populationa9695100.6 (14.9)
Gender
 Male9181100.3 (14.9)
 Female514102.6 (14.5)
Level of education at time of conscription
 Low or middle level575695.6 (14.1)
 High level3938107.7 (13.0)
Cognitive ability scorea by variables recorded at deployment (deployment-related factors)ncMean (s.d.)
Age at deployment
 <25 years7120100.2 (14.5)
 25–29 years373599.5 (14.9)
 30–39 years1439101.6 (15.4)
 40–49 years34198.7 (19.2)
 ≥50 years56996.9 (17.9)
Military rank during deployment
 Private860697.2 (14.9)
 Non-commissioned officer, commissioned officer or civilian4598105.3 (13.6)
Marital status
 Married/partner777699.7 (15.2)
 Single5428100.4 (14.7)
 Low-medium7841100.1 (15.2)
 High536399.9 (14.8)
Deployment region
 The Balkans652199.9 (15.1)
 Afghanistan4487100.1 (14.9)
 Iraq1958100.2 (15.0)
 Other23899.2 (16.0)
Perceived war-zone stress score
 Low (10–13)3981100.4 (15.4)
 Medium (14–19)5844100.3 (14.9)
 High (≥20)337999.0 (14.7)
Possible PTSD (PRIM-PTSD cut-off 24.5)
 Score <24.511 922100.3 (15.0)
 Score ≥24.5105397.6 (14.9)
Probable PTSD (PRIM-PTSD cut-off 29.5)
 Score <29.512 635100.1 (15.0)
 Score ≥29.534096.7 (15.1)
  • a BPP linear transformed to a scale with mean 100 and standard deviation 15.

  • b Number of unique persons in the study.

  • c The numbers in this part of the table are larger than the actual number of persons in the study because a person can have returned questionnaires from several deployments.