Incidence of hip fractures.

The incidence of hip fractures in the period 1971-1976 was calculated. The overall incidence was about 3 per thousand above the age of 50 years and about 20 per thousand above the age of 80 years. Hip fractures were twice as prevalent in females as in males and the incidence was found to double for each 5-year increment in age. The percentage of femoral neck fractures decreased with age in females but was constant in males.