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Screening Tests

Screening Tests are used in persons who have no symptoms of a specific disease, but may have the early stage of the disease or the stage just prior to the disease. The following things are different between screening tests and diagnostic tests:

  • With screening tests, the number of affected persons is likely to be small
  • With screening tests, questions may arise about whether or not taking action will be helpful.
  • If a screening test is costly and only a small number of people are likely to be identified with early disease, it may be hard to justify doing the test. r It is costly to screen large number
  • It is costly to screen large numbers of people, most of whom will not have the condition for which screening is being done.
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