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Comorbidity does not predict long-term mortality after total hip arthroplasty

Journal article
Authors Erik Bülow
Ola Rolfson
Peter Cnudde
Cecilia Rogmark
Göran Garellick
Szilard Nemes
Published in Acta Orthopaedica
Volume 88
Issue 5
Pages 472-477
ISSN 17453674
Publication year 2017
Published at Institute of Clinical Sciences, Section for Anesthesiology, Biomaterials and Orthopaedics, Department of Orthopaedics
Institute of Clinical Sciences, Section for Anesthesiology, Biomaterials and Orthopaedics
Institute of Clinical Sciences
Pages 472-477
Language en
Links doi.org/10.1080/17453674.2017.13412...
Subject categories Orthopedics

Abstract

© 2017 The Author(s). Published by Taylor & Francis on behalf of the Nordic Orthopedic Federation. Background and purpose — In-hospital death following total hip arthroplasty (THA) is related to comorbidity. The long-term effect of comorbidity on all-cause mortality is, however, unknown for this group of patients and it was investigated in this study. Patients and methods — We used data from the Swedish Hip Arthroplasty Register, linked to the National Patient Register from the National Board of Health and Welfare, for patients operated on with THA in 1999–2012. We identified 120,836 THAs that could be included in the study. We evaluated the predictive power of the Charlson and Elixhauser comorbidity indices on mortality, using concordance indices calculated after 5, 8, and 14 years after THA. Results — All comorbidity indices performed poorly as predictors, in fact worse than a base model with age and sex only. Elixhauser was, however, the least bad choice and it predicted mortality with concordance indices 0.59, 0.58, and 0.56 for 5, 8, and 14 years after THA. Interpretation — Comorbidity indices are poor predictors of long-term mortality after THA.

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