The incidence of traumatic spinal cord injury (SCI) in the United States has been estimated at 30 cases per million population at risk. Thus, 8000 to 10,000 new cases can be expected annually. The actual incidence is probably higher. Minor injuries are often not reported, and those associated with trauma fatalities may go unnoticed. SCI is predominantly a disease of young men. The mean age has been reported as 33.5 years,1 with a male-to-female predominance of 4 to 1. Spinal injury occurs more frequently on weekends and holidays and during summer months. The majority (90 percent) of cases are caused by blunt trauma with most of these from motor vehicle crashes.
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