Titre

When can the Bland & Altman limits of agreement method be used and when it should not be used.

Type
article
Institution
UNIL/CHUV/Unisanté + institutions partenaires
Périodique
Auteur(s)
Taffé, P.
Auteure/Auteur
Liens vers les personnes
Liens vers les unités
ISSN
1878-5921
Statut éditorial
Publié
Date de publication
2021-09
Volume
137
Première page
176
Dernière page/numéro d’article
181
Peer-reviewed
Oui
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Résumé
The Bland and Altman limits of agreement (LoA) method is almost universally used to compare two measurement methods, when the outcome is continuous. The method relies on strong statistical assumptions, which are unlikely to hold in practice. Given the popularity of this simple method, it is timely to explain when it can be safely used and when it should not be used.
Based on a small sample of simulated data where the truth is known, we illustrate what happens when the LoA method is used and the underlying assumptions are violated.
When each measurement method has a different precision or the systematic difference between the two methods is not constant, the LoA method should not be used. For this setting, we refer to an alternative unbiased statistical method, which comes at the cost of having to gather repeated measurements by at least one of the two measurement methods.
The LoA method is valid under very restrictive conditions and when these conditions do not hold the only way out is to gather repeated measurements by at least one of the two measurement methods and use an alternative existing statistical methodology.
Sujets

Bias

Statistics as Topic/m...

Agreement

Differential bias

Limits of agreement

Proportional bias

precision

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Date de création
2021-05-05T07:39:39.007Z
Date de création dans IRIS
2025-05-20T21:22:15Z
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When can the Bland-Altman LoA method be used and when it should not be used (version Word).pdf

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postprint

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https://creativecommons.org/licenses/by-nc-nd/4.0

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1.28 MB

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Adobe PDF

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