Use of “population served” distorted findings
BMJ 1996; 313 doi: https://doi.org/10.1136/bmj.313.7068.1329a (Published 23 November 1996) Cite this as: BMJ 1996;313:1329- Barry Tennison,
- Alison Frater,
- Keith Baker
- Director of public health Assistant director of public health West Hertfordshire Health Authority, Welwyn Garden City AL8 6JL
- Assistant director of public health East and North Hertfordshire Health Authority, Welwyn Garden City AL8 6JL
EDITOR,—M A Richards and J C Parrott raise important issues about tertiary cancer services.1 Sadly, their paper does not contribute to our understanding of benchmarking for tertiary cancer centres because the calculation of population denominators is seriously flawed. The standard method of calculating catchment populations for specific services uses the proportions of current activity provided by different providers to allocate a district's resident population to those providers.2 The key principle is that the catchment populations of all providers add up to the total populations of the …
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