作者
Stephen L Hillis, Nancy A Obuchowski, Kevin M Schartz, Kevin S Berbaum
发表日期
2005/5/30
期刊
Statistics in medicine
卷号
24
期号
10
页码范围
1579-1607
出版商
John Wiley & Sons, Ltd.
简介
There are several different statistical methods for analysing multireader ROC studies, with the Dorfman–Berbaum–Metz (DBM) method being the most frequently used. Another method is the corrected F method proposed by Obuchowski and Rockette (OR). The DBM and OR procedures at first appear quite different: DBM is a three‐way ANOVA analysis of pseudovalues while OR is a two‐way ANOVA analysis of accuracy estimates with correlated errors. We show that the original DBM and OR F statistics for testing the null hypothesis of equal treatments have the same form and will typically have similar values; however, differences in the denominator degrees of freedom will result in differences in p‐values even when the F statistics are identical. We show how the methods can be generalized to include variations in the accuracy measure, covariance method, and degrees of freedom. Identical results are obtained …
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