Letters NHS data in the time of reform

Dismantling the signposts to public health? No, satnav has arrived

BMJ 2012; 344 doi: http://dx.doi.org/10.1136/bmj.e4137 (Published 19 June 2012) Cite this as: BMJ 2012;344:e4137
  1. Michael Soljak, clinical research fellow1
  1. 1Imperial College London, Department of Primary Care and Public Health, Reynolds Building, Charing Cross Campus, London W6 8RP, UK
  1. m.soljak{at}imperial.ac.uk

Some of the concerns raised by Pollock and colleagues about the implications of the Health and Social Care Act 2012 for public health information are wrong.1

Practice registrations may be unreliable for population estimates because list sizes are inflated, but census based estimates are not a gold standard. For example, estimated 2010 resident populations of London boroughs from the Office for National Statistics and the Greater London Authority vary by up to 18%. …

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