Trauma-related major lower limb amputations: an epidemiologic study.

The annual number of major lower limb amputations in Denmark as a consequence of trauma was constant during the period 1978 through 1990, with about 70 (1.4 per 100,000 population) per year. The mean age of the amputation population was 49.4 years (males, 44.8 years; females, 58.8 years). Analysis of the age distribution shows characteristic differences between male and female patients. The average hospital stay was 49 days, and 56% of patients were discharged to their homes. The most prevalent amputation levels were transtibial and above-knee, which accounted for about 80% of all amputations. The only systematic change during the period under study was the increase in the number of through-knee amputations. The in-hospital mortality was related to sex, level of amputation, and age. The relative number of amputations varied in the different counties of Denmark and a positive correlation between population density and rate of amputation was found.