Interval estimation under two study designs for kappa with binary classifications.
Cornfield's test-based method of setting a confidence interval on a parameter associated with a two-by-two contingency table is adapted for use with the measure of agreement kappa. One-sided confidence intervals derived in this way are compared to other intervals proposed for kappa under two study designs. Both designs involve two ratings per subject on a dichotomous scale. In one design the same two raters make all evaluations; in the other, possibly different pairs of raters evaluate different subjects, or the same rater carries out a pair of independent assessments for each subject. It is shown through simulation that lower bounds based on Cornfield's test-based method attain the nominal coverage probability more often than other intervals proposed in the literature.
Hale
C A
CA
Columbia University, Division of Biostatistics, New York, New York 10032-3799.
Fleiss
J L
JL
D006679:HIV Seropositivity / Q000453:epidemiology*; D006801:Humans; D008297:Male; D008433:Mathematics; D015233:Models, Statistical; D009679:Nuclear Family; D011336:Probability; D012107:Research Design