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First UK national data reveal more breast cancers between screenings than expected

BMJ 2011; 342 doi: http://dx.doi.org/10.1136/bmj.d1117 (Published 17 February 2011) Cite this as: BMJ 2011;342:d1117
  1. Susan Mayor
  1. 1London

Breast cancers that develop between scheduled screening tests—interval cancers—occur at a slightly higher rate than expected, according to the first national data for the UK.

The study analysed data for more than 7.3 million women aged 50 to 64 who had a routine screening test for breast cancer between April 1997 and March 2003 at the 92 screening centres in England, Wales, and Northern Ireland. They were all taking part in the UK NHS Breast Screening Programme, which invites women aged between 50 and 70 years for a mammogram every three years.

Results showed the rate …

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