Youden Index Calculation From a 2x2 Table
Calculates the Youden Index for data from a 2x2 table
youden_index(Cell1, Cell2, Cell3, Cell4)
Cell1 |
Value for cases with a positive test |
Cell2 |
Value for controls with a positive test |
Cell3 |
Value for cases with a negative test |
Cell4 |
Value for controls with a negative test |
Youden Index
Mike Malek-Ahmadi
1. Ruopp MD, Perkins NJ, Whitcomb BW, Schisterman EF. Youden Index and optimal cut-point estimated from observations affected by a lower limit of detection. Biom J 2008;50(3):419-430.
2. Shaikh SA (2011) Measures derived from a 2 x 2 table for an accuracy of a diagnostic test. J Biomet Biostat 2:128
#From Shaikh (2011), page 3, 2x2 table for "Diagnostic Test Evaluation" youden_index(105, 171, 15, 87)
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