Index of Multiple Deprivation
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An Index of Multiple Deprivation (IMD) is used to identify how deprived an area is. It uses a range of economic, social and housing data to create a single deprivation score for each small area of the country.
In MAST, indices of multiple deprivation are arranged in several different ways:
An IMD decile is a dimension which places the deprivation scores of individual areas into one of ten groups of equal frequency, ranging from the 10% most deprived areas to the 10% least deprived areas. These can be used to show the relative deprivation level of the area the casualty lives in; the relative deprivation level of the area the driver involved in the crash lives in; or in casualty reports, it is also possible to see the relative deprivation level of the area in which the related driver lives.
An IMD quartile is a dimension which places the deprivation scores of individual areas into one of four groups of equal frequency, ranging from the 25% most deprived to the 25% least deprived areas. As before, there are IMD quartile dimensions for casualties; drivers; and in casualty reports, for the related driver.
It is possible to drill down within IMD deciles and IMD quartiles to show vigintiles. These put the deprivation scores into twenty groups of equal frequency, ranging from the 5% most deprived to the 5% least deprived areas.
For general information on how deprivation levels are derived, see the Census website. For information specific to English IMDs, see the Department for Communities and Local Government website. For information specific to Scottish IMDs, see The Scottish Government website. For information specific to Welsh IMDs, see the Welsh Government website
