The effectiveness of screening programs is evaluated through several metrics:
- Sensitivity and Specificity: These measure the test’s ability to correctly identify those with and without the disease. - Positive Predictive Value (PPV) and Negative Predictive Value (NPV): These indicate the likelihood that a positive or negative test result is accurate. - Reduction in Mortality and Morbidity: The ultimate goal of screening is to reduce the incidence and severity of the disease. - Cost-Benefit Analysis: This involves comparing the costs of the screening program to the financial and social benefits derived from early detection and treatment.
