Comparing methods of measurement: why plotting difference against
standard method is misleading.
J. Bland, and D. Altman. Lancet, 346 (8982):
1085--1087(October 1995)
Abstract
When comparing a new method of measurement with a standard method,
one of the things we want to know is whether the difference between
the measurements by the two methods is related to the magnitude of
the measurement. A plot of the difference against the standard measurement
is sometimes suggested, but this will always appear to show a relation
between difference and magnitude when there is none. A plot of the
difference against the average of the standard and new measurements
is unlikely to mislead in this way. We show this theoretically and
by a practical example.
%0 Journal Article
%1 Blan_1995_1085
%A Bland, J. M.
%A Altman, D. G.
%D 1995
%J Lancet
%K (Epidemiology), 7564793 Bias Humans, Measures, Reference Standards, Statistics, Values, Weights and
%N 8982
%P 1085--1087
%T Comparing methods of measurement: why plotting difference against
standard method is misleading.
%V 346
%X When comparing a new method of measurement with a standard method,
one of the things we want to know is whether the difference between
the measurements by the two methods is related to the magnitude of
the measurement. A plot of the difference against the standard measurement
is sometimes suggested, but this will always appear to show a relation
between difference and magnitude when there is none. A plot of the
difference against the average of the standard and new measurements
is unlikely to mislead in this way. We show this theoretically and
by a practical example.
@article{Blan_1995_1085,
abstract = {When comparing a new method of measurement with a standard method,
one of the things we want to know is whether the difference between
the measurements by the two methods is related to the magnitude of
the measurement. A plot of the difference against the standard measurement
is sometimes suggested, but this will always appear to show a relation
between difference and magnitude when there is none. A plot of the
difference against the average of the standard and new measurements
is unlikely to mislead in this way. We show this theoretically and
by a practical example.},
added-at = {2009-06-03T11:20:58.000+0200},
author = {Bland, J. M. and Altman, D. G.},
biburl = {https://www.bibsonomy.org/bibtex/214da06bbddbc4b9cbe3192a35932c25e/hake},
description = {The whole bibliography file I use.},
interhash = {2b1e0c7f51d0b1c76eacb7c0854f00d9},
intrahash = {14da06bbddbc4b9cbe3192a35932c25e},
journal = {Lancet},
keywords = {(Epidemiology), 7564793 Bias Humans, Measures, Reference Standards, Statistics, Values, Weights and},
month = Oct,
number = 8982,
pages = {1085--1087},
pmid = {7564793},
timestamp = {2009-06-03T11:21:04.000+0200},
title = {Comparing methods of measurement: why plotting difference against
standard method is misleading.},
volume = 346,
year = 1995
}