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Incidence of stress fractures of the femoral shaft in women treated with bisphosphonate
Linköping University, Department of Clinical and Experimental Medicine. Linköping University, Faculty of Health Sciences.
Linköping University, Department of Clinical and Experimental Medicine, Orthopaedics and Sports Medicine . Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Orthopaedic Centre, Department of Orthopaedics Linköping.
2009 (English)In: ACTA ORTHOPAEDICA, ISSN 1745-3674, Vol. 80, no 4, 413-415 p.Article in journal (Refereed) Published
Abstract [en]

Background Recent case reports have identified an association between long-term bisphosphonate treatment and stress fractures of the femoral shaft. The risk of such fractures in bisphosphonate users has not been determined. Methods We identified women over 55 years of age with the specific fracture pattern by searching the operation registry of the hospitals in 2 healthcare districts. Prevalence of bisphosphonate treatment was provided by a Swedish national registry covering all drugs delivered to all individuals since 2005. Results The number of women on bisphosphonate treatment was 3,087. Of these, 5 had femoral stress fractures. They had been taking bisphosphonates for 3.5 to 8.5 years. The incidence density for a patient on bisphosphonate was 1/1,000 per year (95% CI: 0.3-2). In the remaining 88,869 women who were not taking bisphosphonates, there were 3 stress fractures. Thus, their risk (without correction for inhomogeneity in age distribution) was 46 times less (95% CI: 11-200). Interpretation These results are rough estimations based on a comparatively small material. Still, a treatment-associated incidence density of 1/1,000 is acceptable, considering that bisphosphonate treatment is likely to reduce the incidence density of any fracture by 1511,000 according to a large randomized trial (Black et al. 1996).

Place, publisher, year, edition, pages
2009. Vol. 80, no 4, 413-415 p.
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Medical and Health Sciences
Identifiers
URN: urn:nbn:se:liu:diva-21522DOI: 10.3109/17453670903139914OAI: oai:DiVA.org:liu-21522DiVA: diva2:241471
Available from: 2009-10-02 Created: 2009-10-02 Last updated: 2009-10-02

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Schilcher, JörgAspenberg, Per

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Department of Clinical and Experimental MedicineFaculty of Health SciencesOrthopaedics and Sports Medicine Department of Orthopaedics Linköping
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  • apa
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  • de-DE
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