Letters

Reduction in mortality from breast cancer

BMJ 2005; 330 doi: http://dx.doi.org/10.1136/bmj.330.7498.1024-b (Published 28 April 2005) Cite this as: BMJ 2005;330:1024

Presentation of benefits and harms needs to be balanced

  1. Peter C G⊘tzsche, director (pcg@cochrane.dk),
  2. Hazel Thornton, honorary visiting fellow,
  3. Karsten J J⊘rgensen, physician
  1. Nordic Cochrane Centre, Rigshospitalet Department, 7112, Blegdamsvej 9, DK-2100 Copenhagen, Denmark
  2. Department of Health Sciences, University of Leicester
  3. Nordic Cochrane Centre, Rigshospitalet Department, 7112, Blegdamsvej 9, DK-2100 Copenhagen, Denmark

    EDITOR—Olsen et al found a 25% reduction in breast cancer mortality in Copenhagen compared with what they would expect to find in the absence of screening.1 They did an observational study, which is not considered to be a reliable method for evaluating mortality reductions with screening. …

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