Authors' reply

BMJ 1996; 312 doi: https://doi.org/10.1136/bmj.312.7029.509c (Published 24 February 1996) Cite this as: BMJ 1996;312:509
  1. Nicholas J Wald,
  2. Philip Murphy,
  3. Philippa Major,
  4. Carol Parkes,
  5. Chris Frost,
  6. Joy Townsend
  1. Professor Computer programmer Research assistant Lecturer Statistician Cancer Research Campaign Cancer Screening Research Group, Wolfson Institute of Preventive Medicine, St Bartholomew's Hospital Medical College, London EC1M 6BQ
  2. Senior scientist Medical Research Council Epidemiology and Medical Care Unit, Wolfson Institute of Preventive Medicine

    EDITOR,—As A H S Lee and colleagues imply, cancers detected only by two view mammography would be expected to be smaller, but our data indicate that any difference is small. Tumour size was similar in women who had either one or two views. In the group which had two views (one interpreted by one reader and both by another) the median size of the tumours detected by one view only was 13 mm compared with 12 mm if two views were …

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