Letters Colorectal cancer

Secondary care data may mislead

BMJ 2010; 340 doi: https://doi.org/10.1136/bmj.c2503 (Published 11 May 2010) Cite this as: BMJ 2010;340:c2503
  1. William T Hamilton, consultant senior lecturer1,
  2. Margaret P Astin, research associate1,
  3. Tom Griffin, research associate1,
  4. Richard D Neal, senior lecturer2,
  5. Peter W Rose, university lecturer3
  1. 1NIHR School for Primary Care Research, Department of Community Based Medicine University of Bristol, Bristol BS8 2AA
  2. 2Department of Primary Care and Public Health, Cardiff University, North Wales Clinical School, Wrexham LL13 7YP
  3. 3Department of Primary Care and Public Health, University of Oxford, Oxford OX3 7LF
  1. w.hamilton{at}bristol.ac.uk

    Two methodological concerns make it tricky to interpret the findings of Jellema and colleagues’ systematic review of diagnosing colorectal cancer in primary care.1

    Firstly, studies from settings other than primary care were included. Any population that has …

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