Abstract
The mortality and morbidity associated with traumatic brain injury (TBI) is considered to be one of the major public health problems in Western industrialized countries. About 200 cases per 100,000 indicates that about 500,000 persons sustain a head injury each year in the United States (1). Although the incidence of vehicular TBI has decreased 43% from 1979 to 1992, the incidence related to firearms has increased (2). Traumatic brain injury is broadly classified into mild, moderate and severe categories based on the Glasgow coma scale (GCS) (1,3–5). The mild category includes the group with a GCS score of 13–15, the moderate score of 9–12, and the severe score of 3–8.