Journal
STATISTICS IN MEDICINE
Volume 26, Issue 3, Pages 596-619Publisher
WILEY
DOI: 10.1002/sim.2532
Keywords
receiver operating characteristic (ROC) curve; corrected F; diagnostic radiology; degrees of freedom
Categories
Funding
- NIBIB NIH HHS [R01 EB000863, R01EB000863] Funding Source: Medline
Ask authors/readers for more resources
There are several methods available for analysing multireader ROC studies that generalize results to both the reader and case populations. Two of these methods-the Dorfman-Berbaum-Metz (DBM) method and the Obuchowki-Rockette (OR) method-appear to be quite different in their original formulations. However, recently it has been shown that the DBM and OR procedures yield the same test statistic when based on the same accuracy measure and covariance estimation method, but inferences can vary depending on which denominator degrees of freedom (ddf) method, DBM or OR, is used. I show in simulations that there are problems with both ddf methods: OR is ultraconservative with significance levels considerably below the nominal level, and DBM can result in extremely wide confidence intervals because the ddf can be close to zero. I propose a new ddf method that overcomes both of these problems and can be used with either the OR or DBM procedure. Copyright (c) 2006 John Wiley & Sons, Ltd.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available