Screening Yield Explained

Screening efforts aim to detect diseases in individuals who might not yet show symptoms or know they are affected. The key is identifying previously unrecognized disease.

Defining Screening Yield

The term specifically used for the amount of previously unrecognized disease that is discovered or diagnosed as a direct result of a screening program is called Yield.

• Yield: Represents the number or proportion of individuals found to have the target disease through the screening process. It directly measures the diagnostic outcome of the screening effort itself.

Understanding Other Terms

It's important to distinguish Yield from related concepts:

• Predictive accuracy: Refers to how well a screening test predicts the presence or absence of the disease in the future or at the time of testing (e.g., positive predictive value, negative predictive value).
• Reliability: Concerns the consistency and repeatability of the screening test results. A reliable test gives similar results under consistent conditions.
• Validity: Assesses how accurately the screening test measures the condition it is intended to measure. It relates to the test's true accuracy (sensitivity and specificity).

Therefore, the amount of previously unrecognized disease diagnosed via screening is known as the screening program's Yield.