CompareTests: Correct for Verification Bias in Diagnostic Accuracy & Agreement
Version 1.2

A standard test is observed on all specimens. We treat the second test (or sampled test) as being conducted on only a stratified sample of specimens. Verification Bias is this situation when the specimens for doing the second (sampled) test is not under investigator control. We treat the total sample as stratified two-phase sampling and use inverse probability weighting. We estimate diagnostic accuracy (category-specific classification probabilities; for binary tests reduces to specificity and sensitivity, and also predictive values) and agreement statistics (percent agreement, percent agreement by category, Kappa (unweighted), Kappa (quadratic weighted) and symmetry tests (reduces to McNemar's test for binary tests)). See: Katki HA, Li Y, Edelstein DW, Castle PE. Estimating the agreement and diagnostic accuracy of two diagnostic tests when one test is conducted on only a subsample of specimens. Stat Med. 2012 Feb 28; 31(5) .

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AuthorHormuzd A. Katki and David W. Edelstein
Date of publication2017-02-06 16:37:03
MaintainerHormuzd Katki <katkih@mail.nih.gov>
LicenseGPL-3
Version1.2
URL http://dceg.cancer.gov/about/staff-directory/biographies/A-J/katki-hormuzd
Package repositoryView on CRAN
InstallationInstall the latest version of this package by entering the following in R:
install.packages("CompareTests")

Man pages

CompareTests: Correct for Verification Bias in Diagnostic Accuracy &...
CompareTests-package: Correct for Verification Bias in Diagnostic Accuracy &...
fulltable: fulltable attaches margins and NA/NaN category to the output...
specimens: Fictitious data on specimens tested by two methods

Functions

CompareTests Man page Source code
CompareTests-package Man page
fulltable Man page
specimens Man page

Files

NAMESPACE
NEWS
data
data/specimens.rda
R
R/fulltable.R
R/CompareTests.R
MD5
DESCRIPTION
man
man/specimens.Rd
man/fulltable.Rd
man/CompareTests.Rd
man/CompareTests-package.Rd
CompareTests documentation built on May 19, 2017, 10:16 a.m.