Statistical methods for assessing agreement between two methods of clinical measurement.

Citation data:

Lancet (London, England), ISSN: 0140-6736, Vol: 1, Issue: 8476, Page: 307-10

Publication Year:
1986
PMID:
2868172
DOI:
10.1016/s0140-6736(86)90837-8
Author(s):
J. Martin Bland; Douglas G. Altman
Publisher(s):
Elsevier BV
Tags:
Medicine
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article description
In clinical measurement comparison of a new measurement technique with an established one is often needed to see whether they agree sufficiently for the new to replace the old. Such investigations are often analysed inappropriately, notably by using correlation coefficients. The use of correlation is misleading. An alternative approach, based on graphical techniques and simple calculations, is described, together with the relation between this analysis and the assessment of repeatability.