[Prognostic factors of post-traumatic vegetative states: 522 cases].

Long-term prognosis of post-traumatic vegetative state (VS) remains poorly defined. Three kinds of data have been collected for 522 patients in VS 1 month after head injury: pre-traumatic data; early data, collected during the first two weeks after trauma; late data, collected one month or more after trauma. Statistical relationships have been searched for, between these data and outcome one year after trauma, according to the Glasgow Outcome Scale.