This study addresses the extent to which DSM-IV and DSM-5 definitions of acute stress disorder predict subsequent post-traumatic stress disorder (PTSD) and related psychiatric disorders following trauma.

Patients with randomized admissions to 5 hospitals across Australia (N = 596) were assessed in hospital and reassessed for PTSD at 3 (n = 508), 12 (n = 426), 24 (n = 439), and 72 (n = 314) months using the Clinician-Administered PTSD Scale; DSM-IV definition of PTSD was used at each assessment, and DSM-5 definition was used at 72 months. The Mini-International Neuropsychiatric Interview  was used at each assessment to assess anxiety, mood, and substance use disorders.

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