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  2. Fecal immunochemical test - Wikipedia

    en.wikipedia.org/wiki/Fecal_immunochemical_test

    The fecal immunochemical test (FIT) is a diagnostic technique that examines stool samples for traces of non-visible blood, which could potentially indicate conditions including bowel cancer. [1] Symptoms which could be caused by bowel cancer and suggest a FIT include a change in bowel habit, anaemia, unexplained weight loss, and abdominal pain.

  3. Fecal occult blood - Wikipedia

    en.wikipedia.org/wiki/Fecal_occult_blood

    Fecal occult blood testing (FOBT), as its name implies, aims to detect subtle blood loss in the gastrointestinal tract, anywhere from the mouth to the colon.Positive tests ("positive stool") may result from either upper gastrointestinal bleeding or lower gastrointestinal bleeding and warrant further investigation for peptic ulcers or a malignancy (such as colorectal cancer or gastric cancer).

  4. Stool guaiac test - Wikipedia

    en.wikipedia.org/wiki/Stool_guaiac_test

    The stool guaiac test method may be preferable to fecal immunochemical testing (FIT) if there is a clinical concern about possible gastric or proximal upper intestinal bleeding. [37] However, although heme breakdown is less than globin during intestinal transit, false negative results can be seen with the stool guaiac tests due to degradation ...

  5. What does a faint line on a rapid COVID-19 test mean? - AOL

    www.aol.com/faint-line-covid-19-test-225851470.html

    The only situation in which you wouldn't assume that a faint line on a rapid test is positive is if it turned positive after the allotted testing period, Garner says. "If you just left the test ...

  6. Respirator fit test - Wikipedia

    en.wikipedia.org/wiki/Respirator_fit_test

    Fit test in US Navy. The effectiveness of various types of respirators was measured in laboratories and in the workplace. [3] These measurements showed that in practice, the effectiveness of negative pressure tight fitting respiratory protective devices (RPD) depends on leakage between mask and face, rather than the filters/canisters. [4]

  7. What to do if your COVID test expires — or if you test ...

    www.aol.com/covid-test-expires-test-positive...

    “With a confirmed positive COVID-19 test, you are most likely being sent home to rest, stay away from others, and recover,” UC Davis Health in California wrote Feb. 8 on its website. “This ...

  8. What Really Causes a False Positive COVID-19 Test? Experts ...

    www.aol.com/false-positive-covid-19-test...

    False positive COVID-19 tests occur when you don’t have the novel coronavirus, but the test is positive. Experts explain how and why false positives happen.

  9. Likelihood ratios in diagnostic testing - Wikipedia

    en.wikipedia.org/wiki/Likelihood_ratios_in...

    In fact, post-test probability, as estimated from the likelihood ratio and pre-test probability, is generally more accurate than if estimated from the positive predictive value of the test, if the tested individual has a different pre-test probability than what is the prevalence of that condition in the population.