Technical report
There is no direct way to count the number of new stroke and acute coronary syndrome (ACS) events at the national level. To date, Australian Institute of Health and Welfare reports use estimates derived using algorithms based on unlinked national hospitalisation and deaths data. This technical report assesses how well the algorithms function using linked data from the National Integrated Health Services Information Analysis Asset (NIHSI AA). It describes the validation study undertaken to assess the algorithms and the methods for estimating the incidence of stroke and ACS using linked data from the NIHSI AA. All data presented in this report are available through the online supplementary tables available under Data tables.
Summary
- Key findings from the validation of the stroke algorithm
- Key findings from the validation of the ACS algorithm
1. Introduction
- Aims of the project
- National Integrated Health Services Information Analysis Asset
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Structure of the technical report
2. National monitoring of stroke
- What is stroke?
- How is stroke managed and treated?
- Stroke algorithm
3. Validation of the stroke algorithm
- Data source and methods for validation
- Impact of transfers
- Impact of readmissions
- Consistency of hospital diagnosis codes and underlying cause of death codes
- Implications for monitoring using the algorithm
4. National monitoring of ACS
- What is ACS?
- How is ACS managed and treated?
- ACS algorithm
5. Validation of the ACS algorithm
- Data sources and methods for validation
- Impact of transfers
- Impact of readmissions
- Consistency of hospital diagnosis codes and underlying cause of death codes
- Implications for monitoring using the algorithm
6. Incidence of stroke and ACS using linked data in the NIHSI AA
- Look-back period for identifying new stroke and ACS events
- Incidence of stroke and ACS events
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Denominator population
7. Exploratory analysis of other data sources
- Exploratory analysis using emergency department data
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Exploratory analysis using residential aged care data
8. Discussion
- Limitations of the NIHSI AA
- Conclusions
- Next steps
Appendix A: Data linkage and data sources
End matter: Acknowledgements, Abbreviations, Symbols, Glossary, References, List of tables, List of figures, Related publications