Step 1: Understand the role of screening tests.
Screening tests are done to identify individuals who may have a disease, even if they do not show symptoms.
- Screening is based on one criterion or cut
-off point (3), and is generally used in healthy individuals (1).
- Screening is not a direct basis for treatment (2).
- Screening tests do not rely on the evaluation of symptoms, signs, and laboratory findings (4), which is part of the diagnostic process.