title: A tale of two studies of two disasters: comparing psychosocial responses to disaster among Oklahoma City bombing survivors and Hurricane Katrina evacuees.
abstract: OBJECTIVE
  An accumulation of disaster mental health research literature in the last few decades has contributed knowledge to direct disaster mental health interventions. However, no single set of principles can necessarily outline all anticipated mental health needs to be encountered in a particular disaster.
  
  
  METHODS
  To illustrate how different disaster scenarios may yield a divergence of mental health needs, this article compares mental health findings from two distinctly different studies of two very different populations affected by two very different disasters: directly exposed survivors the Oklahoma City bombing and sheltered evacuees from Hurricane Katrina.
  
  
  RESULTS
  Research on the two disasters reviewed illustrates many facets and complexities of postdisaster mental health needs in different populations in different settings after different types of disasters. The major findings of the Oklahoma City bombing study related to posttraumatic stress disorder and the main findings of the Hurricane Katrina study involved need for treatment of preexisting chronic mental health and substance abuse problems.
  
  
  CONCLUSIONS
  The disaster studies in this review diverged in type of disaster, affected populations, setting, and timing of the study, and these studies yielded a divergence of findings. One disaster mental health model clearly cannot adequately describe all postdisaster scenarios.
authors.affiliation: Department of Psychiatry, University of Texas Southwestern Medical Center at Dallas, 6363 Forest Park Rd., Suite 651, Dallas, TX 75390-8828, USA. carol.north@utsouthwestern.edu
authors.forename: Carol S
authors.initials: CS
authors.lastname: North
mesh_terms: D000328:Adult; D055867:Cyclonic Storms; D004190:Disasters; D005107:Explosions; D005260:Female; D006801:Humans; D008297:Male; D008603:Mental Health; D008962:Models, Theoretical; D013313:Stress Disorders, Post-Traumatic / Q000523:psychology*; D017741:Survivors / Q000523:psychology*; D023481:Terrorism