Abstract
Introduction
Falls are a major challenge for older people and are a significant source of mortality and morbidity. There has been uncertainty as to whether people with total hip (THA) or knee (TKA) arthroplasty have a greater risk of falls and associated fractures. This analysis was to explore this question with a large community dataset.
Materials and methods
Data from all people enroled onto the US Osteoarthritis Initiative programme who had undergone a THA (n = 104) or TKA (n = 165), within a 12-month period, were compared to those who had not undergone an arthroplasty (n = 4631). Data were collected on: the number of participants who reported a fall within a 12-month period; the frequency of falls in this period; and whether a fracture was sustained during this period. Odd ratios were calculated for the probability of experiencing a fall or fracture between the groups.
Results
There was no statistical difference in falls between people following THA (OR 0.90; 95 % CI 0.58–1.41) or TKA (OR 0.95; 0.67–1.35) compared to a non-arthroplasty cohort. Whilst there was no statistical difference in fracture risk between people following TKA compared to non-arthroplasty individuals (OR 1.25; 95 % CI 0.57–2.70), those who underwent THA had a 65 % lower chance of experiencing a fracture in the initial 12 post-operative months compared to the non-THA cohort (OR 0.35; 95 % CI 0.19–0.65; p < 0.01).
Conclusions
There appears a lower chance of experiencing a fracture for people following THA compared to those who have not.
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Funding
The OAI is a public–private partnership comprised of five contracts (N01-AR-2-2258; N01-AR-2-2259; N01-AR-2-2260; N01-AR-2-2261; N01-AR-2-2262) funded by the National Institutes of Health, a branch of the Department of Health and Human Services, and conducted by the OAI Study Investigators. Private funding partners include Merck Research Laboratories; Novartis Pharmaceuticals Corporation, GlaxoSmithKline; and Pfizer, Inc. Private sector funding for the OAI is managed by the Foundation for the National Institutes of Health. This manuscript was prepared using an OAI public use data set and does not necessarily reflect the opinions or views of the OAI investigators, the NIH, or the private funding partners.
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Smith, T.O., Pearson, M. & Latham, S.K. Are people following hip and knee arthroplasty at greater risk of experiencing a fall and fracture? Data from the Osteoarthritis Initiative. Arch Orthop Trauma Surg 136, 865–872 (2016). https://doi.org/10.1007/s00402-016-2445-5
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DOI: https://doi.org/10.1007/s00402-016-2445-5