Скачать или смотреть Youden's Index

Youden's index, also known as Youden's J statistic, is a measure used in medical and diagnostic testing to evaluate the effectiveness of a diagnostic test. It is defined as the difference between the true positive rate (sensitivity) and the false positive rate (1 - specificity):

J=Sensitivity+Specificity−1

Youden's index ranges from 0 to 1, where:

0 indicates that the test is no better than random chance.
1 indicates that the test has perfect sensitivity and specificity.
A higher Youden's index indicates a better diagnostic ability of the test. It is often used to determine the optimal threshold for a test or to compare the performance of different diagnostic tests.


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