Measures of diagnostic tests
Sensitivity
The chance of having a positive test result given that you have a disease (not to be confused with positive predictive value (PPV), which is the other way around.
Specificity
The chance of having a negative test result given that you do not have a disease (not to be confused with negative predictive value (NPV), which is the other way around.
Positive predictive value (PPV)
The chance of having a disease given a positive test result (not to be confused with sensitivity, which is the other way round).
Negative predictive value (NPV)
The chance of not having a disease given a negative test result (not to be confused with specificity, which is the other way round).
Likelihood Ratio (LR)
The ratio of the probability that an individual with the target condition has a specified test result to the probability that an individual without the target condition has the same specified test result.
