The GPRD dataset includes an Index of Multiple deprivation (IMD) score to estimate socioeconomic status at practice level.
We estimated LAD-level deprivation using the 2004 Index of Multiple Deprivation (IMD) in England, which estimated domains of deprivation using measures predominantly collected close to the time of our case ascertainment periods (see table 1).
The practice level predictors were list size, intervals of the index of multiple deprivation (IMD) based on 2010 estimates, 17 and location of practice by country or region of the UK.
Abbreviations in Table 3: CKD chronic kidney disease, IMD Index of multiple deprivation, BP blood pressure, eGFR estimated Glomerular Filtration Rate, CVD cardiovascular disease.
Socioeconomic status was assigned at practice level using 2007 Office for National Statistics estimates of the Index of Multiple Deprivation, a composite area-level marker of deprivation.
Social deprivation was estimated with the 'Index of Multiple Deprivation' (IMD).
Socioeconomic status was estimated using the Index of Multiple Deprivation, which does not measure individual levels of deprivation, and may lead to misclassification bias.
Socio-economic status is estimated using the Index of Multiple Deprivation (IMD) (15 studies) [ 29, 30, 33- 47, 51], the DEPCAT score (3 studies) [ 33, 34, 38] or a derived variable for occupational class [ 31].
Due to changing electoral ward boundaries, we were only able to use the 2001 deprivation estimates, rather than capturing deprivation at multiple time points across the study period.
Data sources: 1 Office for National Statistics ONSS) mid-year estimates 2008. 2 Percentage of people living in the most deprived quintile of the Index of Multiple Deprivation 2007 (England average: 19.9%) (Source: APHO and DH Health Profile 2009).
