Lifetime absolute risk of hip and other osteoporotic fracture in Belgian women.
OBJECTIVE
To estimate the lifetime absolute risks of hip and other osteoporotic fracture in Belgian women aged 60 years and to examine the effect of changes in baseline population fracture risk and changes in life expectancy.


METHODS
Estimates were performed using a Markov microsimulation model and were based on the incidence of first fracture as well as life expectancy. Baseline scenario included projected mortality rates and increasing fracture incidence by 1% per year. Alternative scenarios were performed on age, life expectancy and trends in fracture incidence. Lifetime fracture risk for osteoporotic population (T-score <or= -2.5) was also estimated.


RESULTS
In the baseline scenario, lifetime absolute risks of hip fracture and of any major osteoporotic fracture (hip, clinical vertebral or wrist) were respectively 24.8% and 44.3%. Alternative scenarios showed that when assuming no change of age-specific fracture rates over time, these lifetime risks were 18.3% and 35.2%, while these values were 20.0% and 38.3% assuming no future mortality reductions. For osteoporotic women, these values were respectively 34.5% and 51.5%.


CONCLUSIONS
We conclude that absolute lifetime fracture risks are substantial and that trends in fracture incidence and changes in life expectancy have a marked impact on absolute lifetime fracture risks.
Hiligsmann
Mickaël
M
Department of Economics, University of Liège, Liège, Belgium. m.hiligsmann@ulg.ac.be
Bruyère
Olivier
O
Ethgen
Olivier
O
Gathon
Henry-Jean
HJ
Reginster
Jean-Yves
JY
D000368:Aged; D000369:Aged, 80 and over; D001530:Belgium / Q000453:epidemiology; D005260:Female; D006620:Hip Fractures / Q000453:epidemiology* / Q000209:etiology; D006801:Humans; D008875:Middle Aged; D010024:Osteoporosis / Q000150:complications*; D012307:Risk Factors