Letters Mammography screening

Mammography screening study hampered by inadequate data

BMJ 2014; 349 doi: https://doi.org/10.1136/bmj.g6823 (Published 25 November 2014) Cite this as: BMJ 2014;349:g6823
  1. László Tabár, radiologist1
  1. 1Department of Mammography, Falun Central Hospital, Falun, Sweden
  1. laszlo{at}mammographyed.com

History repeats itself. De Glas and colleagues question the positive impact of early detection on the advanced cancer rate by repeating a common fatal error: they do not know which breast cancers were found in women who attended screening and which were not. They admit that “the Netherlands cancer registry registers anonymous population data” but still use these inadequate data and …

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