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Published 10 December 2008, doi:10.1136/bmj.a2926
Cite this as: BMJ 2008;337:a2926
| The first 150 words of the full text of this article appear below. |
Linking the location of a general practice building to a deprivation score is not ideal.1 As Ashworth and colleagues point out, we found in our study in Rotherham that deprivation scores based on the location of the practice building were a valid proxy for the "true" practice population deprivation score, but only in the sense that there was a high correlation between them.2
However, using the location of the practice building we underestimated the association between deprivation and mortality that we found using a score based on postcode data from the whole practice population. McLean et al showed a similar underestimation in a much larger study of Scottish practices.3
The negative association between deprivation and blood pressure monitoring in English general practice may be greater than Ashworth and colleagues were able to show. Thus we should be cautious before we conclude that inequalities in blood pressure monitoring and control in
Mark Strong, MRC fellow1
1 ScHARR, University of Sheffield, Sheffield S1 4DA
m.strong@sheffield.ac.uk