lr_pos {ClinSigMeasures}

Likelihood Ratio Positive Calculation From a 2x2 Table

Description

Calculates diagnostic test likelihood ratio positive and 95 percent confidence intervals for data from a 2x2 table

Usage

lr_pos(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

Likelihood Ratio Positive and 95 percent confidence intervals

Author(s)

Mike Malek-Ahmadi

References

1. Grimes DA, Schultz KF. Refining clinical diagnosis with likelihood ratios. Lancet 2005;365:1500-1505.

2. Dujardin B, Van den Ende J, Van Gompel A, Unger JP, Van der Stuyft P. Likelihood ratios: a real improvement for clinical decision making? European Journal of Epidemiology 1994 Feb;10(1):29-36.

Examples

#From Table 1 in Dujardin et al (1994)

lr_pos(72, 9, 25, 137)