Post Traumatic Stress:  Diagnostic Criteria

Post Traumatic Stress Disorder is defined in DSM-IV, the fourth edition of the American Psychiatric Association's Diagnostic and Statistical Manual. For a doctor or medical professional to be able to make a diagnosis, the condition must be defined in DSM-IV or its international equivalent, the World Health Organization's ICD-10.

1. the person experienced or witnessed or was confronted with an event or events that involved actual or threatened death or serious injury, or a threat to the physical integrity of self or others;
2. the person's response involved intense fear, helplessness, or horror.

B. The traumatic event is persistently re-experienced in any of the following ways:

1. recurrent and intrusive distressing recollections of the event, including images, thoughts or perceptions;
2. recurrent distressing dreams of the event;
3. acting or feeling as if the traumatic event were recurring (e.g. reliving the experience, illusions, hallucinations, and dissociative flashback episodes, including those on wakening or when intoxicated);
4. intense psychological distress at exposure to internal or external cues that symbolize or resemble an aspect of the traumatic event;
5. physiological reactivity on exposure to internal or external cues that symbolize or resemble an aspect of the traumatic event.

C. Persistent avoidance of stimuli associated with the trauma and numbing of general responsiveness (not present before the trauma) as indicated by at least three of:

1. efforts to avoid thoughts, feelings or conversations associated with the trauma;
2. efforts to avoid activities, places or people that arouse recollections of this trauma;
3. inability to recall an important aspect of the trauma;
4. markedly diminished interest or participation in significant activities;
5. feeling of detachment or estrangement from others;
6. restricted range of affect (eg unable to have loving feelings);
7. sense of a foreshortened future (eg does not expect to have a career, marriage, children or a normal life span).

D. Persistent symptoms of increased arousal (not present before the trauma) as indicated by at least two of the following:

1. difficulty falling or staying asleep;
2. irritability or outbursts of anger;
3. difficulty concentrating;
4. hypervigilance;
5. exaggerated startle response.

E. The symptoms on Criteria B, C and D last for more than one month.