Road safety

Cover of A National Approach to Measuring Non-fatal Crash Outcomes
A National Approach to Measuring Non-fatal Crash Outcomes
  • Publication no: AP-R599-19
  • ISBN: 978-1-925854-13-8
  • Published: 14 March 2019

This report documents an Austroads pilot project (Stage 1) to improve the measurement and reporting of serious injury crashes by matching crash and hospital data. The aim was to provide a proof of concept for a national approach to supply routine data on non-fatal hospitalised road injuries for reporting progress against the National Road Safety Strategy 2011-2020 (NRSS) target of a 30 per cent reduction. A serious injury is defined in the NRSS, and for the purposes of this study, as a hospitalised case.

Neither crash data nor hospital data alone provides an adequate national source of data for reporting progress against the NRSS target, with linkage of hospital and police data recognised by road transport agencies as integral to future reporting. The NSW linked data study (Transport for NSW, 2017) showed the value of linking data.

Key outcomes of the Stage 1 project include successfully linking 2014 crash, hospital and National Death Index data for NSW, Victoria, Queensland, and South Australia, and being granted permissions to link data for the Australian Capital Territory and Northern Territory. Permissions were not obtained from data custodians and ethics committees for linked files with identifying information to be used by road safety agencies.

Stage 1 has provided a proof of concept for a national approach, with a case estimation process developed and applied, and statistical results obtained. The report recommends proceeding with Stage 2 to extend the process to Tasmania and Western Australia, and apply the method to produce a series from 2008 to the latest year of data.

  • Summary
  • Acknowledgements
  • Abbreviations
  • 1.      Purpose and Background
  • 2.      Project Method
    • 2.1    Development and organisation of the pilot project
    • 2.2    Undertaking the pilot project
      • 2.2.1      Project establishment
      • 2.2.2      Obtaining approvals and data
  • 3.      Seeking Approvals to Use Data
    • 3.1    Data sources
    • 3.2    Record selection
    • 3.3    Approach to seeking approvals
      • 3.3.1      Hospital data
      • 3.3.2      Crash data
      • 3.3.3      National Death Index
    • 3.4    Approval timetable
  • 4.      Data Provision, Preparation and Analysis
    • 4.1    Data provision
      • 4.1.1      Process
      • 4.1.2      Data fields
      • 4.1.3      Data provision progress by Stage 1 cut-off dates
    • 4.2    Preparation and analysis of linked data
      • 4.2.1      Terms and definitions
      • 4.2.2      Case estimation process
  • 5.      Statistical Results
    • 5.1    Non-fatal hospitalised road injury cases
    • 5.2    Effect of using linkage on estimates of hospitalised non-fatal road injury
    • 5.3    Deaths to 30 days and to one year after a crash
  • 6.      Summary, Conclusions and Implications
    • 6.1    OBJECTIVE 1: Learn whether relevant ethics committees and data custodians allow the required use of data
    • 6.2    OBJECTIVE 2: Develop the method and test its technical feasibility by applying it to one year of data
    • 6.3    OBJECTIVE 3: Assess the utility of the linked data
    • 6.4    OBJECTIVE 4: Communicate the results and recommend next steps
      • 6.4.1      Communicate the results
      • 6.4.2      Recommended next steps: Stage 2
      • 6.4.3      Other recommended steps
  • References
  • Appendix A          Project Summary
  • Appendix B          Additional Aspects of the Ethical Approval Process
  • Appendix C          Data Field Lists for the Crash and Hospital Data Files
  • Appendix D          Technical Appendices
  • Appendix E          Additional Data Tables