Early screening tests are often encouraged by doctors and advocacy organizations. Unfortunately, these tests are not always accurate and they may detect a condition for which there is no cure.
Doctors need to tailor screening to individual patient health profiles. No test is 100% accurate and false positive results can create stress and anxiety for patients who are in fact completely healthy. Two screening tests are used as examples in this article.
For more information : http://www.fcrss.ca/mythbusters/pdf/myth22_e.pdf
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