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Reduction in mortality from breast cancer

BMJ 2005; 330 doi: (Published 28 April 2005) Cite this as: BMJ 2005;330:1024

Decrease with screening was marked in younger age group

  1. Per-Henrik Zahl, senior statistician,
  2. Jan Mæhlen, professor (
  1. Norwegian Institute of Public Health, PO Box 4404, N-0403 Oslo, Norway
  2. Department of Pathology, Ullevål University Hospital, N-0407 Oslo, Norway

    EDITOR—Based on a complicated statistical model, Olsen et al reported that the breast cancer mortality in Copenhagen dropped by 25% for women aged 50-79 when comparing mortality in the screening period (1991-2001) with a pre-screening period (1981-91) and claimed that this decrease was caused by screening.1

    According to Statistics …

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