Evidence for other colon cancer screening tools such as i FOBT or colonoscopy is substantial and guidelines have been issued by several advisory groups but does not include randomized studies.
In 2009 the American College of Gastroenterology (ACG) suggest that colon cancer screening modalities that are also directly preventive by removing precursor lesions should be given precedence, and prefer a colonoscopy every 10 years in average-risk individuals, beginning at age 50.
The extent to which screening procedures reduce the incidence of gastrointestinal cancer or mortality depends on the rate of precancerous and cancerous disease in that population.
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Gradually government fund disbursement meant that some people are not yet eligible for the national program and should pay for a FOBT by themselves.
An extensive literature has examined the clinical value of FOBT in iron deficiency anemia.
Exercise is associated with extensive changes in gastrointestinal (GI) tract physiology, including diversion of blood flow from the GI tract to muscle and lungs, decreased GI absorption and small intestinal motility, increased colonic transit, neuroimmunoendocrine changes in hormones and peptides such as vasoactive intestinal peptide, secretin and peptide-histidine-methionine.
Substantial changes occur in stress hormones including cortisol, in circulating concentrations and metabolic behavior of various leucocytes, and in immunoglobulin levels and major histocompatibility complex expression.
Thus the FIT test is much more specific for bleeding from the colon or lower gastrointestinal tract than alternatives.