Article ; Online: Bisphosphonate Use and Risk of Atypical Femoral Fractures: A Danish Case Cohort Study with Blinded Radiographic Review.
The Journal of clinical endocrinology and metabolism
2024
Abstract: Context: Prolonged bisphosphonate (BP) treatment for osteoporosis prevents hip and other fractures but causes atypical femoral fractures (AFF).: Objective: To establish the relationship between patterns of BP use and the risk of AFF and hip fractures. ...
Abstract | Context: Prolonged bisphosphonate (BP) treatment for osteoporosis prevents hip and other fractures but causes atypical femoral fractures (AFF). Objective: To establish the relationship between patterns of BP use and the risk of AFF and hip fractures. Other potential risk factors for AFF were also examined. Design: Population-based case-cohort study. Setting: The Danish National Healthcare system maintains longitudinal records of medication use, healthcare utilization, and x-ray images. Participants: Among all 1.9 million Danish adults ≥50, those with subtrochanteric or femoral shaft fractures between 2010-2015 (n = 4,973) were identified and compared to a random sample (n = 37,021). Predictors: Bisphosphonate use was collected from 1995-2015. Main outcome measures: Fracture radiographs (n = 4,769) were reviewed by blinded study radiologists to identify AFFs (n = 181) using established criteria. Traditional hip fractures in the random sample (n = 691) were identified by ICD-10. Results: Compared to <1 year of BP use, 5-7 years of use was associated with a 7-fold increase in AFF [adjusted HR = 7.29 (CI: 3.07,17.30)]; the risk of AFF fell quickly after discontinuation. The 5-year number-needed-to-harm for one AFF was 1,424, while the 5-year number-needed-to-treat to prevent one hip fracture was 56. Glucocorticoid and proton pump inhibitor use were independently associated with increased AFF risk. Thirty-one percent of those with AFF had no BP exposure. Conclusions: The risk of AFF increases with duration of BP use but the beneficial effects of BP therapy in adults ≥50 dramatically exceed this increased risk. Nearly one-third of those with AFF have no BP exposure. |
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Language | English |
Publishing date | 2024-01-10 |
Publishing country | United States |
Document type | Journal Article |
ZDB-ID | 3029-6 |
ISSN | 1945-7197 ; 0021-972X |
ISSN (online) | 1945-7197 |
ISSN | 0021-972X |
DOI | 10.1210/clinem/dgae023 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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