title: Clinical agreement in quantitative measurements.
abstract: With advances in medical technology, simpler and safer methods for diagnosis and therapy are increasingly replacing the old ones and it has become important that these be correctly assessed. When a measurement by a new method is the same as that using the old method, one frequently encounters the problem of assessing the agreement. Evidence such as a correlation equal to 1 or equality of means is known to be inadequate. However, two recent approaches--limits of agreement and intraclass correlation coefficient--have gained acceptance but each has its own merits and demerits. To help investigators choose a procedure which is appropriate and to help them use it properly, we provide a description of these two approaches and discuss their advantages and disadvantages, both clinical and statistical, using a real example.
authors: Department of Biostatistics, University College of Medical Sciences, New Delhi, India.
authors: A
authors: A
authors: Indrayan
authors: R
authors: R
authors: Chawla
mesh_terms: D000704:Analysis of Variance; D015233:Models, Statistical; D012107:Research Design; D013223:Statistics as Topic