Asthma in Australia 2008
1. As the coverage of the emergency department (ED) data is less than 100%, these rates will be an underestimate of the true ED visit rate among people with asthma.
2. Data contains a mix of diagnoses coded using International Classification of Diseases, 9th and 10th revisions (ICD-9 and ICD-10). Comparability factors, calculated from hospitalisation data (see Appendix 1, Section A1.9.3) have been used to adjust for the changes in coding from ICD-9 to ICD-10. ED visits coded to ICD-9 were converted to ICD-10 using the following conversions: ages 0–5 years, no conversion; 5–34 years, converted by a factor of 1.0326; 35–64 years, converted by a factor of 0.7938; 65 years and over, converted by a factor of 0.4813.
Sources: New South Wales (NSW) Emergency Department Data Collection (EDDC) Health Outcomes and Information Statistical Toolkit (HOIST), Centre for Epidemiology and Research, NSW Department of Health; Australian Bureau of Statistics.
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