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Seasonal variations of immunochemical and gaiac faecal occult blood tests
  1. Lydia Guittet1,
  2. Elodie Guillaume1,
  3. Véronique Bouvier2,
  4. Guy Launoy3
  1. 1Faculty of Medicine, University of Caen Basse-Normandy (UCBN), Caen, France
  2. 2Calvados Cancer Digestive Registry, Caen University Hospital, Caen, France
  3. 3INSERM, ERI3 ‘Cancers & Populations’, Caen University Hospital, Caen, France
  1. Correspondence to Dr Lydia Guittet, INSERM ERI3, Cancers & Populations, Faculty of Medicine, Caen University Hospital, Avenue de la Cote de Nacre, F-14032, Caen cedex, France; guittet-l{at}

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In their article recently published in Gut, Grazzini et al observed that accuracy of the OC Sensor immunochemical faecal occult blood test (FOBT) depends on the season.1 They found a decrease in positivity rates in the summer compared with winter (table 1). This decrease, probably related to degradation …

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  • Competing interests None.

  • Provenance and peer review Not commissioned; not externally peer reviewed.

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