A comparison of the Scottish index of multiple deprivation (SIMD) 2004 with the 2009 + 1 SIMD: does choice of measure affect the interpretation of inequality in mortality?

Ralston, K., Dundas, R. and Leyland, A. H. (2014) A comparison of the Scottish index of multiple deprivation (SIMD) 2004 with the 2009 + 1 SIMD: does choice of measure affect the interpretation of inequality in mortality? International Journal of Health Geographics, 13, 27. (doi:10.1186/1476-072X-13-27) (PMID:25001866) (PMCID:PMC4105786)

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Abstract

Background There is a growing international literature assessing inequalities in health and mortality by area based measures. However, there are few works comparing measures available to inform research design. The analysis here seeks to begin to address this issue by assessing whether there are important differences in the relationship between deprivation and inequalities in mortality when measures that have been constructed at different time points are compared.

Methods We contrast whether the interpretation of inequalities in all-cause mortality between the years 2008-10 changes in Scotland if we apply the earliest (2004) and the 2009 + 1 releases of the Scottish Index of Multiple Deprivation (SIMD) to make this comparison. The 2004 release is based on data from 2001/2 and the 2009 + 1 release is based on data from 2008/9. The slope index of inequality (SII) and 1:10 ratio are used to summarise inequalities standardised by age/sex using population and mortality records.

Results The 1:10 ratio suggests some differences in the magnitude of inequalities measured using SIMD at different time points. However, the SII shows much closer correspondence.

Conclusions Overall the findings show that substantive conclusions in relation to inequalities in all-cause mortality are little changed by the updated measure. This information is beneficial to researchers as the most recent measures are not always available. This adds to the body of literature showing stability in inequalities in health and mortality by geographical deprivation over time.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Dundas, Ms Ruth and Leyland, Professor Alastair
Authors: Ralston, K., Dundas, R., and Leyland, A. H.
College/School:College of Medical Veterinary and Life Sciences > Institute of Health and Wellbeing > MRC/CSO Unit
Journal Name:International Journal of Health Geographics
Publisher:BioMed Central
ISSN:1476-072X
ISSN (Online):1476-072X
Copyright Holders:Copyright © 2014 The Authors
First Published:First published in International Journal of Health Geographics 13:27
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
656601Measuring Health, Variations in Health and Determinants of HealthAlastair LeylandMedical Research Council (MRC)MC_UU_12017/5IHW - MRC/CSO SPHU