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Limits of agreement provide a straightforward and intuitive approach to agreement between different methods for measuring the same quantity. When pairs of observations using the two methods are independent, i.e., on different subjects, the calculations are very simple and straightforward. Some authors collect repeated data, either as repeated pairs of measurements on the same subject, whose true value of the measured quantity may be changing, or more than one measurement by one or both methods of an unchanging underlying quantity. In this paper we describe methods for analysing such clustered observations, both when the underlying quantity is assumed to be changing and when it is not.

Original publication

DOI

10.1080/10543400701329422

Type

Journal article

Journal

J Biopharm Stat

Publication Date

2007

Volume

17

Pages

571 - 582

Keywords

Algorithms, Analysis of Variance, Biometry, Cardiography, Impedance, Clinical Laboratory Techniques, Diagnostic Techniques and Procedures, Humans, Radionuclide Ventriculography, Reproducibility of Results, Stroke Volume