Friday, September 22, 2023

Breast cancer: conflating case fatality with mortality

  1. Jason L Oke, research lecturer1,
  2. H Gilbert Welch, senior investigator2
  1. 1Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, UK
  2. 2Center for Surgery and Public Health, Brigham and Women’s Hospital, Boston, MA, USA
  1. jason.oke{at}

While we agree with Taylor and colleagues that the prognosis for women with breast cancer has improved, we are troubled by their use of the term mortality.1 Mortality is conventionally measured in a population at risk of developing a disease, not among those diagnosed with the disease. Case fatality is the conventional term for what was measured in this paper.2

The problem is not …

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