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Incidence of stress...
Incidence of stress fractures of the femoral shaft in women treated with bisphosphonate
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- Schilcher, Jörg (author)
- Linköpings universitet,Institutionen för klinisk och experimentell medicin,Hälsouniversitetet
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- Aspenberg, Per (author)
- Östergötlands Läns Landsting,Linköpings universitet,Ortopedi och idrottsmedicin,Hälsouniversitetet,Ortopedkliniken Linköping
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(creator_code:org_t)
- 2009-10-26
- 2009
- English.
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In: ACTA ORTHOPAEDICA. - : Medical Journals Sweden AB. - 1745-3674 .- 1745-3682. ; 80:4, s. 413-415
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Abstract
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- 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).
Keyword
- MEDICINE
- MEDICIN
Publication and Content Type
- ref (subject category)
- art (subject category)
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