Statistics and Data Science Seminar
Yuqing Tang
UIC
A Comparison Model for Measuring Individual Agreement via GEE Approach
Abstract: Evaluating individual agreement between different raters are often of interest
in method comparison studies and in reliability studies. We propose a general
comparison model and create a
exible setting such that any subset of raters can
be selected as test or reference raters and the individual agreement between them
can be assessed. Two comparative agreement indices, the individual difference ratio
(IDR) and within difference ratio (WDR), are proposed. IDR is a non-inferiority
assessment such that the individual reading from different raters can not be inferior
to the replicated readings within the same rater. When there is one test rater and
one reference rater, our approach degenerates to FDA's method for evaluating
individual bioequivalence under relative scale. WDR is a superiority assessment
such that the precision of selected test raters can be better than that of selected
reference raters. GEE approach is used for estimation and inference. Simulation
study is conducted to assess the performance of our approach and the result shows
that our method works well for both continuous data and categorical data.
Wednesday February 24, 2010 at 3:00 PM in SEO 636