title: Risk factors predict post-traumatic stress disorder differently in men and women.
abstract: BACKGROUND
  About twice as many women as men develop post-traumatic stress disorder (PTSD), even though men as a group are exposed to more traumatic events. Exposure to different trauma types does not sufficiently explain why women are more vulnerable.
  
  
  METHODS
  The present work examines the effect of age, previous trauma, negative affectivity (NA), anxiety, depression, persistent dissociation, and social support on PTSD separately in men and women. Subjects were exposed to either a series of explosions in a firework factory near a residential area or to a high school stabbing incident.
  
  
  RESULTS
  Some gender differences were found in the predictive power of well known risk factors for PTSD. Anxiety predicted PTSD in men, but not in women, whereas the opposite was found for depression. Dissociation was a better predictor for PTSD in women than in men in the explosion sample but not in the stabbing sample. Initially, NA predicted PTSD better in women than men in the explosion sample, but when compared only to other significant risk factors, it significantly predicted PTSD for both men and women in both studies. Previous traumatic events and age did not significantly predict PTSD in either gender.
  
  
  CONCLUSIONS
  Gender differences in the predictive value of social support on PTSD appear to be very complex, and no clear conclusions can be made based on the two studies included in this article.
authors.affiliation: Department of Psychology, University of Aarhus, Aarhus, Denmark.
authors.forename: Dorte M
authors.initials: DM
authors.lastname: Christiansen
authors.affiliation: Department of Psychology, University of Aarhus, Aarhus, Denmark.
authors.forename: Ask
authors.initials: A
authors.lastname: Elklit