Reaction to Severe Stress, and Adjustment Disorders
This category differs from others in that it includes disorders identifiable not only on grounds of symptomatology and course but also on the basis of one or other of two
an exceptionally stressful life event (e.g. natural or man-made disaster, combat, serious accident, witnessing the violent death of others, or being the victim of torture, terrorism, rape, or other crime) producing an acute stress reaction
significant life change leading to continued unpleasant circumstances that result in an adjustment disorder
Stressful event is thought to be the primary and overriding causal factor, and the disorder would not have occurred without its impact.