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FIT Results

  • All lab providers in B.C. for Fecal Occult Blood testing using FIT are experiencing an issue affecting the test results.
  • The percentage of positive results is increasing suggesting that some borderline negative results are now testing positive.
  • It is estimated that this change in the measurements will affect approximately 5% of patients tested -- i.e. they will now have a screen positive result whereas previously they would have had a borderline negative result.
  • While the positive predictive value of FIT screening may be lower than it has been in the past, a positive FIT still places the patient at higher risk. The Colon Screening Program recommends colonoscopy follow-up for all screen-positive cases.
  • The Colon Screening Program does not recommend ordering another FIT as it is not possible to know if the patient is truly negative for polyps/cancer or if the patient has intermittent bleeding of polyps. Follow-up colonoscopy is recommended even if a patient has another FIT that is negative.
  • Patients who have had a positive test result will continue to be referred to their health authority for pre-colonoscopy assessment. Please continue to communicate that this result is common (more than 15 per cent require further testing) and that it does not mean that cancer was found.

SOURCE: FIT Results ( )
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