Barbier S et al. - The risk of fracture may be different between women of the same age. This may be hidden in a comparison of standardised ratios. This finding should be considered when examining risk factors and implementing public health interventions. Methods
Study to assess geographical variations in the relationship between age and hip fracture incidence among women under 85 within the same country
Women aged 50-85yrs, living in France in 2004
Hip fracture cases were identified for closed hip fractures and procedural codes for treatment
The Moran index and a spatial model using latitude and longitude were used to assess the geographical heterogeneities of cumulative incidence risk (CIR) and age effect
Results
29,218 hip fracture cases were identified
A south-to-north CIR gradient ranging from 7 to 16% was observed
The variation in the number of yrs until double hip fracture incidence was 75%
In the south, and more markedly in southwest France, the women are at higher risk of hip fracture at a younger age
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