Posttraumatic stress disorder (PTSD) commonly co-occurs with other psychiatric disorders. Data from epidemiologic surveys indicate that the vast majority of individuals with PTSD meet criteria for at least one other psychiatric disorder, and a substantial percentage have 3 or more other psychiatric diagnoses. A number of different hypothetical constructs have been posited to explain this high comorbidity; for example, the self-medication hypothesis has often been applied to understand the relationship between PTSD and substance use disorders.Details
The fourth edition of Diagnostic and Statistical Manual of Mental Disorders (DSM-IV) defines posttraumatic stress disorder (PTSD) as a reaction to an event, either personally experienced or witnessed, that involves actual or threatened death or serious injury or a threat to the physical integrity of self or others.
As well, the response to the traumatic event must involve intense fear, helplessness, or horror.Details