The accuracy of a diagnostic test is evaluated through two main measures:
1. Sensitivity: The ability of a test to correctly identify those with the disease (true positive rate). 2. Specificity: The ability of a test to correctly identify those without the disease (true negative rate).
Other important metrics include:
- Positive Predictive Value (PPV): The probability that a person with a positive test result actually has the disease. - Negative Predictive Value (NPV): The probability that a person with a negative test result does not have the disease.
