The CNBSS found that annual screening did not reduce breast cancer mortality rates any more than a standard physical exam would. Jean Seely, a professor of radiology at the University of Ottawa, head of breast imaging at The Ottawa Hospital, and one of the authors of the new study, called for women age 40 and up to get regular mammograms in an interview with CBC News. “CNBSS 1 and 2 were not reliably randomized controlled trials, nor were they truly trials of screening.”ĬNBSS 1 and 2 refers to sets of data collected in 19, which excluded deaths that occurred from cancers detected in the prevalence screening.ĭr. “ In addition to other serious flaws that have been documented elsewhere, there is now direct eyewitness evidence available of subversion of randomization of the CNBSS and the systematic inclusion of symptomatic individuals,” the new study reads. The new study, published this week in the Journal of Medical Screening, was conducted by researchers from the University of Toronto, University of Ottawa, University of British Columbia, University of Alberta, and Harvard University it suggests that there are serious problems in the randomization aspect, including many issues in the screening trial. During the study in the 1990s, 38 of the nearly 90,000 participants died of breast cancer, 28 of whom did not receive a mammogram.
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