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Bisphosphonate use after clinical fracture and risk of new fracture
Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Geriatric Medicine.
Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Occupational and Environmental Medicine.
Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Geriatric Medicine.
2018 (English)In: Osteoporosis International, ISSN 0937-941X, E-ISSN 1433-2965, Vol. 29, no 4, p. 937-945Article in journal (Refereed) Published
Abstract [en]

Summary: Among older adults with a previous fracture, treatment for osteoporosis was initially associated with a higher risk of new fracture. However, the relative risk of new fracture decreased over time, a trend that is consistent with a beneficial effect, as treatment for osteoporosis is prescribed to reduce high fracture risks.

Introduction: The purpose of this study was to examine whether bisphosphonate use is associated with a lower risk of new fracture after a clinical fracture in older adults.

Methods: Data were available for 3,329,400 adults in Sweden who were aged ae<yen> 50 years between 2006 and 2011. During this period, 260,353 sustained a clinical fracture and were naïve to bisphosphonates at the time. Those who subsequently received a bisphosphonate were matched to up to three others on sex, year of birth, and type and year of initial fracture. The final cohort comprised 83,104 adults (26.3% bisphosphonate users).

Results: During the period from initial fracture to initiation of bisphosphonate treatment, the incidence rate of any new clinical fracture was higher in those who later became bisphosphonate users than in those who remained nonusers (175.1 vs. 75.9 per 1000 person-years; hazard ratio 2.30, 95% confidence interval 2.19 to 2.41). Similarly, during the first 6 months of treatment, the incidence rate was higher in bisphosphonate users than in nonusers (128.8 vs. 90.2 per 1000 person-years; hazard ratio 1.41, 95% confidence interval 1.32 to 1.51). However, this difference decreased over time: by months 12 to 18, the incidence rate was similar in users and nonusers (59.3 vs. 55.3 per 1000 person-years; hazard ratio 1.03, 95% confidence interval 0.91 to 1.16).

Conclusions: There was a decrease in the relative risk of new fracture during bisphosphonate treatment, a trend that is consistent with a beneficial treatment effect, as bisphosphonates are prescribed to reduce high fracture risks.

Place, publisher, year, edition, pages
Springer London, 2018. Vol. 29, no 4, p. 937-945
Keywords [en]
Elderly, Men, Nonvertebral, Older, Osteoporosis, Refracture
National Category
Orthopaedics
Identifiers
URN: urn:nbn:se:umu:diva-146426DOI: 10.1007/s00198-017-4367-7ISI: 000427631200016PubMedID: 29397408OAI: oai:DiVA.org:umu-146426DiVA, id: diva2:1204676
Available from: 2018-05-08 Created: 2018-05-08 Last updated: 2018-06-09Bibliographically approved

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Bergman, JonathanNordström, AnnaNordström, Peter

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