This paper discusses a generalized version of the concordance correlation coefficient for
agreement data. The concordance correlation coefficient evaluates the accuracy and …

Background In epidemiological studies researchers often depend on proxies to obtain
information when primary subjects are unavailable. However, relatively few studies have …

Cohen's Kappa and a number of related measures can all be criticized for their definition of
correction for chance agreement. A measure is introduced that derives the corrected …

Agreement can be regarded as a special case of association and not the other way round.
Virtually in all life or social science researches, subjects are being classified into categories …

A method for analysing dependent agreement data with categorical responses is proposed.
A generalized estimating equation approach is developed with two sets of equations. The …

Many estimators of the measure of agreement between two dichotomous ratings of a person
have been proposed. The results of Fleiss (1975) are extended, and it is shown that four …

Agreement among at least two evaluators is an issue of prime importance to statisticians,
clinicians, epidemiologists, psychologists, and many other scientists. Measuring …

Background Rater agreement is important in clinical research, and Cohen's Kappa is a
widely used method for assessing inter-rater reliability; however, there are well documented …

In square contingency tables, analysis of agreement between row and column
classifications is of interest. For nominal categories, kappa co-efficient is used to summarize …

The kappa statistic is commonly used for quantifying inter-rater agreement on a nominal
scale. In this review article we discuss five interpretations of this popular coefficient. Kappa is …