contROC {nonbinROC}R Documentation

Performs ROC-type analysis for continuous scale gold standard

Description

Assess the accuracies of diagnostic tests when the gold standard is continuous.

Usage

contROC(gldstd, test1, test2 = NULL)

Arguments

gldstd vector giving the gold standard
test1 vector giving a diagnostic test
test2 optional vector giving another diagnostic test

Value

In the paired design, `contROC' returns the accuracies and associated standard errors of the diagnostic tests, their covariance and the test for comparing two diagnostic tests' accuracies.
Otherwise, `contROC' returns the accuracy and associated standard error of the diagnostic test.

Author(s)

Paul Nguyen

References

Obuchowski, N. A. (2005) Estimating and comparing diagnostic tests' accuracy when the gold standard is not binary. Academic Radiology, 12, 1198-1204.

Examples

#A paired design example for tumor renal masses from Obuchowski (2005)
data(tumor)
attach(tumor)
contROC(SURG, CT, Fi)

#A paired design example for blood iron concentrations from Obuchowski (2006)
data(blood)
attach(blood)
contROC(Serum, TIBC, TS)

[Package nonbinROC version 1.0.1 Index]