Calcified Tissue International

, Volume 90, Issue 1, pp 1–13 | Cite as

FRAX® with and without Bone Mineral Density

  • John A. Kanis
  • Eugene McCloskey
  • Helena Johansson
  • Anders Oden
  • William D. Leslie
Review

Abstract

The use of FRAX, particularly in the absence of BMD, has been the subject of some debate and is the focus of this review. The clinical risk factors used in FRAX have high validity as judged from an evidence-based assessment and identify a risk that is responsive to pharmaceutical intervention. Moreover, treatment effects, with the possible exception of alendronate, are not dependent on baseline BMD and strongly suggest that FRAX identifies high-risk patients who respond to pharmaceutical interventions. In addition, the selection of high-risk individuals with FRAX, without knowledge of BMD, preferentially selects for low BMD. The prediction of fractures with the use of clinical risk factors alone in FRAX is comparable to the use of BMD alone to predict fractures and is suitable, therefore, in the many countries where DXA facilities are sparse. In countries where access to BMD is greater, FRAX can be used without BMD in the majority of cases and BMD tests reserved for those close to a probability-based intervention threshold. Whereas the efficacy for agents to reduce fracture risk has not been tested prospectively in randomized controlled trials in patients selected on the basis of FRAX probabilities, there is compelling evidence that FRAX with or without the use of BMD provides a well-validated instrument for targeting patients most likely to benefit from an intervention.

Keywords

FRAX Fracture probability Clinical risk factor Intervention threshold Risk assessment 

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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • John A. Kanis
    • 1
  • Eugene McCloskey
    • 1
    • 2
  • Helena Johansson
    • 1
    • 3
  • Anders Oden
    • 1
    • 3
  • William D. Leslie
    • 4
  1. 1.WHO Collaborating Centre for Metabolic Bone DiseasesUniversity of Sheffield Medical SchoolSheffieldUK
  2. 2.Academic Unit of Bone MetabolismNorthern General HospitalSheffieldUK
  3. 3.Centre for Bone Research at the Sahlgrenska Academy, Institute of MedicineUniversity of GothenburgGothenburgSweden
  4. 4.University of ManitobaWinnipegCanada

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