youden_index {ClinSigMeasures}

Youden Index Calculation From a 2x2 Table

Description

Calculates the Youden Index for data from a 2x2 table

Usage

youden_index(Cell1, Cell2, Cell3, Cell4)

Arguments

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

Value

Youden Index

Author(s)

Mike Malek-Ahmadi

References

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

Examples

#From Shaikh (2011), page 3, 2x2 table for "Diagnostic Test Evaluation"

youden_index(105, 171, 15, 87)