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Early- and Late-Term Dislocation Risk After Primary Hip Arthroplasty in the Medicare Population
Journal article   Peer reviewed

Early- and Late-Term Dislocation Risk After Primary Hip Arthroplasty in the Medicare Population

Arthur L. Malkani, Kevin L. Ong, Edmund Lau, Steven M. Kurtz, Benjamin J. Justice and Michael T. Manley
The Journal of arthroplasty, v 25(6), pp 21-25
2010
DOI: https://doi.org/10.1016/j.arth.2010.04.014
PMID: 20541885
Featured in Collection :   UN Sustainable Development Goals @ Drexel

Abstract

dislocation Medicare population primary hip arthroplasty
From 1998 to 2007 Medicare 5% national sample dataset, 39 271 primary total hip arthroplasty (THA) patients were identified. Dislocations within 2 years (early) and after 2 years (late) of primary THA were identified. Cox regression was used to evaluate patient, hospital, and procedure characteristics for risk of dislocation, and 1540 (3.92%) and 451 (1.15%) patients were diagnosed with early and late dislocations, respectively. Dislocation rate at 6 months' follow-up decreased steadily between 1998 and 2007 from 4.21% to 2.14%. Early and late dislocation risks were lower by 35% ( P < .001) and 43% ( P = .01), respectively, for patients operated during 2004 and 2007 compared with 1998 and 2003. Higher Charlson index scores (i.e., more comorbid conditions) and surgeon volume were significant risk factors ( P ≤ .04). Decrease in dislocation risks after primary THA seems to coincide with increasing use of larger diameter femoral heads. An awareness of risk factors for dislocation can help surgeons identify high-risk patients so as to prescribe appropriate intervention strategies.

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108 citations in Web of Science
130 citations in Scopus

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Orthopedics
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