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Table 1 DSM-IV-TR criteria for PTSD[1]

From: A systematic review of the relationship between severe maternal morbidity and post-traumatic stress disorder

A Stressor
  □ The person has experienced, witnessed, or been confronted with an event or events that involve actual or threatened death or serious injury, or a threat to the physical integrity of oneself or others.
  □ The person's response involved intense fear, helplessness, or horror
B Intrusive recollection (1 or more)
  □ Recurrent and intrusive distressing recollections of the event, including images, thoughts, or perceptions.
  □ Recurrent distressing dreams of the event
  □ Acting or feeling as if the traumatic event were recurring
  □ Intense psychological distress at exposure to internal or external cues that symbolize or resemble an aspect of the traumatic event.
  □ Physiologic reactivity upon exposure to internal or external cues that symbolize or resemble an aspect of the traumatic event
C Avoidant/numbing (3 or more)
  □ Efforts to avoid thoughts, feelings, or conversations associated with the trauma
  □ Efforts to avoid activities, places, or people that arouse recollections of the trauma
  □ Inability to recall an important aspect of the trauma
  □ Markedly diminished interest or participation in significant activities
  □ Feeling of detachment or estrangement from others
  □ Restricted range of affect
  □ Sense of foreshortened future
D Hyper-arousal (2 or more)
  □ Difficulty falling or staying asleep
  □ Irritability or outbursts of anger
  □ Difficulty concentrating
  □ Hyper-vigilance
  □ Exaggerated startle response
E Duration
  □ Duration of the disturbance (symptoms in B, C, and D) is more than one month
F Functional significance
  □ The disturbance causes clinically significant distress or impairment in social, occupational, or other important areas of functioning