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8 Cards in this Set
- Front
- Back
Relative risk |
Incidence of outcome in exposed / incidence among unexposed |
|
Absolute risk reduction |
Control event rate - experimental event rate |
|
NNT |
1/ARR |
|
Sensitivity |
true positive / all with disease (true positives + false negatives) |
|
Specificity |
true negative / all without disease (false positives + true negatives) |
|
Positive predictive value |
true positives / all test positives |
|
negative predictive value |
true negative / all test negatives |
|
as prevalence of a dz increases, what happens to PPV and NPV? |
PPV increases and NPV decreases and vice versa |