To demonstrate that there may be in your bowel polyps are present, there are several research methods. One of which are methods are the FOBT's. FOBT tests examine the presence of occult blood. FOBT are available for individual screening, but also for mass screening. For both screening methods is that they meet specific requirements.
A screening test for colorectal cancer patients would have to identify with an "early stage" cancer, which can be treated curative, and patients with "advanced" adenoma, which present a high risk to develop colorectal cancer in the future.
A now commonly used test for mass screening is the iFOB test. The iFOB test (immunochemical fecal occult blood test) is quite simple to perform and is twice as sensitive for the detection of "occult blood" compared to the much longer used Guaiac-FOB test, chemical test with the "cards". You only need to provide a sample in comparison with the gFOB test where normally three samples should be examined. The iFOB test reacts only on human blood while gFOB test may also be positive when there are certain foods or drugs are present in the stool. As a result, is the precision and reliability in the use of the iFOB test is higher than any other case of FOBT's.