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Interval cancers in a FOBT-based colorectal cancer population screening programme

Interval cancers in a FOBT-based colorectal cancer population screening programme: implications for stage, gender and tumour site

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Authors

  • R. J. C. Steele
  • P. McClements
  • C. Watling
  • G. Libby
  • D. Weller
  • D .H. Brewster
  • R. Black
  • F. A. Carey
  • C. G. Fraser

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Info

Original languageEnglish
Pages576-581
Number of pages6
JournalGut
Journal publication date1 Apr 2012
Volume61
Issue4
Early online date19/09/11
DOIs
StatePublished

Abstract

Background: Between 2000 and 2007, a demonstration pilot of biennial guaiac faecal occult blood test (GFOBT) screening was carried out in Scotland. Methods: Interval cancers were defined as cancers diagnosed within 2 years (ie, a complete screening round) of a negative GFOBT. The stage and outcome of the interval cancers were compared with those arising contemporaneously in the non-screened Scottish population. In addition, the gender and site distributions of the interval cancers were compared with those in the screen-detected group and the non-screened population. Results: Of the cancers diagnosed in the screened population, interval cancers comprised 31.2% in the first round, 47.7% in the second, and 58.9% in the third, although this was due to a decline in the numbers of screen-detected cancers rather than an increase in interval cancers. There were no consistent differences in the stage distribution of interval cancers and cancers from the non-screened population, and, in all three rounds, both overall and cancer-specific survival were significantly better for patients diagnosed with interval cancers (p

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