Developing measures to track dispersion in Public Health Outcomes Framework indicators
PHE ePoster Library. Jephson D. Apr 9, 2019; 257474
David Jephson
David Jephson
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Abstract
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Abstract Public Health England have been developing a method to measure changes in the dispersion of values across local authorities for a range of indicators. Traditionally, we track whether national values for an indicator are improving or worsening over time and do the same, separately, for local authorities. This new measure aims to help assess both together by considering whether changes at national level are due to the gap between the best and worst performing areas narrowing or widening over time.A number of approaches have been investigated and a Gini coefficient based measure using boot-strapped confidence intervals has been developed. This has been applied to each year of data available for each indicator. A chi squared test for trend has then been used to determine whether there have been changes over time for both national values and dispersion of local authorities.Initial results show a mixed picture. In some cases, whilst improvements have been made at national level, the dispersion of local authority values has been widening. This suggests that areas that began with better outcomes were improving at a faster rate than those with worse outcomes. In other cases, improvements at national level have seen a narrowing of the dispersion.This measure could be used to track progress for a broad range of public health topics. It aims to enable policy decision making to be based not only on the direction of travel at national level, but to also be informed by the spread of outcomes by local area. Funding No additional funding has been received for this work.
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