Premium
Estimating kappa from binocular data and comparing marginal probabilities
Author(s) -
Schouten Hubert J. A.
Publication year - 1993
Publication title -
statistics in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.996
H-Index - 183
eISSN - 1097-0258
pISSN - 0277-6715
DOI - 10.1002/sim.4780122306
Subject(s) - mcnemar's test , kappa , statistics , mathematics , cohen's kappa , sample (material) , ordinal data , statistical hypothesis testing , computer science , chemistry , geometry , chromatography
Suppose that two graders classify all eyes in a sample of patients for the presence or absence of a specified abnormality. In the statistical analysis of the data, possible correlation between the observations in the right and left eyes should be taken into account. Recently, general methods have been developed to analyse grader agreement in rating paired body structures. In the present paper, an alternative procedure is proposed that utilizes existing formulae for the computation of )weighted( kappa and its standard error. In addition, the McNemar test is generalized to compare the probabilities of a positive judgement by the two graders.