Mortality following hip arthroplasty—inappropriate use of National Joint Registry (NJR) data

Whitehouse, Sarah L., Bolland, Benjamin J.R.F., Howell, Jonathan R., Crawford, Ross W., & Timperley, A. John (2014) Mortality following hip arthroplasty—inappropriate use of National Joint Registry (NJR) data. Journal of Arthroplasty, 29(9), pp. 1827-1834.

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Mortality following hip arthroplasty is affected by a large number of confounding variables each of which must be considered to enable valid interpretation. Relevant variables available from the 2011 NJR data set were included in the Cox model. Mortality rates in hip arthroplasty patients were lower than in the age-matched population across all hip types. Age at surgery, ASA grade, diagnosis, gender, provider type, hip type and lead surgeon grade all had a significant effect on mortality. Schemper's statistic showed that only 18.98% of the variation in mortality was explained by the variables available in the NJR data set. It is inappropriate to use NJR data to study an outcome affected by a multitude of confounding variables when these cannot be adequately accounted for in the available data set.

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ID Code: 72174
Item Type: Journal Article
Refereed: Yes
Keywords: mortality, Registry, survival, Cox regression, hip replacement, Schemper's statistic, National Joint Registry, primary
DOI: 10.1016/j.arth.2014.04.022
ISSN: 0883-5403
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > CLINICAL SCIENCES (110300) > Orthopaedics (110314)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute of Health and Biomedical Innovation
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2014 Elsevier
Copyright Statement: This is the author’s version of a work that was accepted for publication in Journal of Arthroplasty. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Arthroplasty, VOL 29, ISSUE 9 (2014) DOI: 10.1016/j.arth.2014.04.022
Deposited On: 28 May 2014 22:52
Last Modified: 13 Oct 2015 13:00

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