Before revision: Example Consider a test with the following 2×2 confusion matrix: Condition (as determined by “Gold standard”) Positive Negative Testoutcome Positive 26 12 Negative 3 48 We calculate the diagnostic odds ratio as: This diagnostic odds ratio is greater than one, so we know that the test is discriminating correctly.
After revision: Example Consider a test with the following 2×2 confusion matrix: Positive Positive 26Negative 12 Negative 3 48 We calculate the diagnostic odds ratio as: This diagnostic odds ratio is greater than one, so we know that the test is discriminating correctly.