In the US, 3-4 percent of amputations are related to trauma and the rest are due to a combination of peripheral vascular disease and diabetes mellitus. The prevalence of lower extremity amputations from trauma is higher because these people tend to live longer after their injury than do those who have amputations from medical reasons.
Traumatic lower extremity amputation is largely a problem of young men. More than 85 percent of the population is male and were younger than 40 years of age. The use of motor vehicles accounts for about 75 percent of these amputations. These included occupants of motor vehicles, pedestrians, and especially motorcycle riders. Some will have isolated leg injuries while a small percentage have head and neck injuries, thoracic injuries, and abdominal injuries.
The most common type of amputation is transtibial amputations, which account for half of all amputations. The rest are from transfemoral injuries, partial foot amputations, and hip disarticulations. Other amputations occur at the level of the knee with disarticulation of the knee.