Race and sex differences in hip fracture incidence.

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Abstract
Incidence rates for hip fracture in the USA were estimated using nonfederal hospital discharges from the National Hospital Discharge Survey for 1974-1979. Age-specific incidence curves for women and men showed similar patterns of increase in risk with age, with risks .apprx. 2-fold every 5 yr after age 50 yr. Age-specific rates by 5 yr age groups were compared among the 4 race-sex groups. No significant differences were observed between Black females, Black males and White males. Rates for White females were 1.5- to 4-fold those for Black females after age 40 yr and were .apprx. 2-fold those for White males after age 50 yr. Analysis based on an independent data source of nonfederal hospital discharges in Washington, DC [USA] confirmed these relationships. In the Washington study, White women were at 2-fold the risk for hip fracture (controlled for age) compared with Black women and at 2.7-fold the risk for hip fracture (controlled for age) compared to White men. No significant differences were observed between Black women and Black men.