Time trends of age-adjusted incidence rates of first hip fractures: a register-based study among older people in Viborg County, Denmark, 1987–1997

Abstract

Introduction A retrospective cohort study was performed to investigate if incidence rates of first hip fractures are changing in a Danish county. Study material was obtained from an excerpt from a computerized national health register and covers the period 1987–1997. Methods First hip fractures were identified through a search 10 years back from the date of admission. To assess the 20-year trend, 1978 data were included. The study period saw inclusion of 3,036 first (1987–1997) and 122 first and recurrent (1978) hip fracture patients aged 50 years and older. Data were analyzed using weighted regression analysis. Results Age-adjusted first hip fracture incidence rates increased significantly (PPP<0.001). Mean age at admission rose from 78.9 to 80.8 years. Conclusion In conclusion, the results provided support for an increasing incidence of first hip fractures, even when aging of the population was accounted for.