Mortality Following Primary Hip and Knee Arthroplasty Supplementary Report
Authors:   Australian Orthopaedic Association National Joint Replacement Registry, Smith Paul N. ,   Australian National University Medical School, Gill David R.J. ,   Australian Orthopaedic Association National Joint Replacement Registry, McAuliffe Michael J. ,   Australian Orthopaedic Association National Joint Replacement Registry,   Queensland University of Technology, McDougall Catherine ,   Australian Orthopaedic Association National Joint Replacement Registry,   University of Queensland Medical School, Stoney James D. ,   Australian Orthopaedic Association National Joint Replacement Registry, Vertullo Christopher J. ,   Australian Orthopaedic Association National Joint Replacement Registry,   Griffith Centre of Biomedical and Rehabilitation Engineering, Griffith University,   Knee Research Australia, Wall Christopher J. ,   Australian Orthopaedic Association National Joint Replacement Registry,   University of Queensland Rural Clinical School, Corfield Sophia ,   Australian Orthopaedic Association National Joint Replacement Registry, Cashman Kara ,   South Australian Health and Medical Research Institute, Cuthbert Alana R. ,   South Australian Health and Medical Research Institute, Du Peiyao ,   South Australian Health and Medical Research Institute, Harries Dylan ,   South Australian Health and Medical Research Institute, Holder Carl ,   South Australian Health and Medical Research Institute, Lorimer Michelle F. ,   South Australian Health and Medical Research Institute, Lewis Peter L. ,   Australian Orthopaedic Association National Joint Replacement Registry,   University of Adelaide Medical School
Published: September 2023

Mortality information has been obtained by matching all procedures reported to the Registry up to and including 31 December 2022 with the National Death Index (NDI). The NDI is the national mortality database maintained by the Australian Institute of Health and Welfare (AIHW). The Registry was granted access to this data following a formal ethics application to AIHW. Adjusted mortality is obtained after direct standardisation of the crude cumulative mortality data by 5 year age intervals and gender to the Estimated Resident Population Status based on the 2001 census. As the total population has a younger age structure than the population of the Registry, the adjusted mortality is substantially lower than the crude mortality. By minimising the effects of age and gender differences within groups, the adjusted measure may be used to compare the mortality of different procedures and is useful when comparing mortality over time. The rate per 100 person years has been calculated from the date of the first joint procedure to either the date of death or 31 December 2022. This provides a true rate. This Report is one of 16 supplementary reports to complete the AOANJRR Annual Report for 2023. Information on the background, purpose, aims, benefits and governance of the Registry can be found in the Introductory chapter of the 2023 Hip, Knee and Shoulder Arthroplasty Annual Report. The Registry data quality processes including data collection, validation and outcomes assessment, are provided in detail in the Data Quality section of the introductory chapter of the 2023 Hip, Knee and Shoulder Arthroplasty Annual Report: https://aoanjrr.sahmri.com/annual-reports-2023.