Impact of Cause of Death Coding Changes on Dementia Mortality Statistics (ONS)

Summary

Recent changes to the coding of chest infections in the collection and processing of mortality statistics has contributed to a (virtual, non-veridical) reduction of 2.5% in deaths given the underlying cause of respiratory disease and an increase of 7.0% in deaths allocated to the mental and behavioural disorders chapter, including dementia. Deaths ascribed to an underlying cause of dementia, similarly, increased as a result of a rule change to count aspiration pneumonia as a consequence of one of a number of other conditions. The statistical anomalies resulting from coding changes resulted in a total percentage change of 7.1% in deaths attributed to an underlying cause of dementia.

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Reference

Impact of the implementation of IRIS software for ICD-10 cause of death coding on mortality statistics, England and Wales. London: Office for National Statistics (ONS), August 8th 2014. Office for National Statistics, Statistical bulletin.

About Dementia and Elderly Care News

Dementia and Elderly Care News. Wolverhampton Medical Institute: WMI. (jh)
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