1. Exposure to actual or threatened death, serious injury, or sexual violence
2. Presence of 1 or more intrusion symptoms
3. Persistent avoidance of stimuli related to event
4. Negative alterations in cognitions and mood
5. Marked alterations in arousal and reactivity
6. Duration is longer than 1 month
7. Causes significant impairment in social, occupational, and other functioning areas
8. Not attributable to substance or other medical condition