The DOI matches its Crossref record; 25 of the 25 references it cites were found in a registry or an index.
Measuring agreement in method comparison studies
Abstract
Agreement between two methods of clinical measurement can be quantified using the differences between observations made using the two methods on the same subjects. The 95% limits of agreement, estimated by mean difference 1.96 standard deviation of the differences, provide an interval within which 95% of differences between measurements by the two methods are expected to lie. We describe how graphical methods can be used to investigate the assumptions of the method and we also give confidence intervals. We extend the basic approach to data where there is a relationship between difference and magnitude, both with a simple logarithmic transformation approach and a new, more general, regression approach. We discuss the importance of the repeatability of each method separately and compare an estimate of this to the limits of agreement. We extend the limits of agreement approach to data with repeated measurements, proposing new estimates for equal numbers of replicates by each method on each subject, for unequal numbers of replicates, and for replicated data collected in pairs, where the underlying value of the quantity being measured is changing. Finally, we describe a nonparametric approach to comparing methods.
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In the citing paper
“For the calculations, the mean of the Moxy passive trials was used against the corresponding active trial and therefore proper adjustments to SD were made as proposed by Bland and Altman.40”
From Near-infrared spectroscopy-derived muscle oxygen saturation on a 0% to 100% scale: reliability and validity of the Moxy Monitor (2019) · cites this paper as [40]
In the citing paper
“The variance for single differences between pairs of measurements on different subject is found by summing the between subjects and within subjects variances (Bland and Altman 1999).”
From Agreement Between Methods of Measurement with Multiple Observations Per Individual (2007) · cites this paper as Bland and Altman 1999
In the citing paper
“(In our earlier paper (Bland and Altman 1999), we incorrectly stated that this number should be used to multiply the difference in the sum of squares, rather than divide it.)”
From Agreement Between Methods of Measurement with Multiple Observations Per Individual (2007) · cites this paper as Bland and Altman 1999
In the citing paper
“It is valuable, however, to obtain replicate measurements by each method on each individual so that the repeatability of the two methods can be compared (Bland and Altman 1999).”
From Agreement Between Methods of Measurement with Multiple Observations Per Individual (2007) · cites this paper as Bland and Altman 1999
In the citing paper
“Although these have been described previously (Bland and Altman 1999) no numerical example was given for the case when the true value of the quantity being measured varied and also there was an error in the mathematical description.”
From Agreement Between Methods of Measurement with Multiple Observations Per Individual (2007) · cites this paper as Bland and Altman 1999
In the citing paper
“As described in section 5 in Bland and Altman (1999), we derive the estimated standard deviation for individual differences from the variance of the subject mean differences and an extra term derived from the separate measurement error of each method.”
From Agreement Between Methods of Measurement with Multiple Observations Per Individual (2007) · cites this paper as Bland and Altman (1999)
In the citing paper
“Bland–Altman comparisons reported good agreement for LLR vs. Navlit and Navopt, with > 95% and > 91.8% of measurements within the limits of agreement across all CPAK parameters, respectively.”
From Imageless robotic total knee arthroplasty determines similar coronal plane alignment of the knee (CPAK) parameters to long leg radiographs (2024) · cites this paper as [31]
In the citing paper
“Bland–Altman comparisons reported good agreement for LLR vs. Navlit and Navopt, with > 95% and > 91.8% of measurements within the limits of agreement across all CPAK parameters, respectively.”
From Imageless robotic total knee arthroplasty determines similar coronal plane alignment of the knee (CPAK) parameters to long leg radiographs (2024) · cites this paper as [31]
In the citing paper
“Current research into the HR accuracy of wrist-worn wearable devices attempt to compare the measurement between wearable PPG and a reference method, such as an ECG, in order to determine whether or not measurements between the devices are outside of clinically important limits of agreement, so that devices can supplement, eventually replace, or be used interchangeably37,38.”
From Guidelines for wrist-worn consumer wearable assessment of heart rate in biobehavioral research (2020) · cites this paper as [37]
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“96 times the standard deviation (SD) of these differences (random error), which are the two components of the 95% coefficient of reproducibility [14].”
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Metadata
- Authors
- Bland, J. M., & Altman, D. G.
- Affiliations
- St George's, University of London (GB)
- University of Oxford (GB)
- ORCID
- Altman, Douglas G
- Venue
- Statistical Methods in Medical Research
- Publisher
- SAGE Publications
- Published
- 1999-04
- Volume
- 8
- Issue
- 2
- Pages
- 135-160
- ISSN
- 0962-2802 (ISSN-L)
- 1477-0334
- OpenAlex
- W2159759971
- Cited by
- 9,619
- References
- 25
- Citations by year
- 2026: 393 · 2025: 421 · 2024: 483 · 2023: 494 · 2022: 559 · 2021: 681 · 2020: 610 · 2019: 506 · 2018: 485 · 2017: 457 · 2016: 412 · 2015: 437 · 2014: 461 · 2013: 388 · 2012: 401
- FWCI
- 47.68
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Statistical Methods in Medical Research (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Social Sciences › Decision Sciences › Statistics, Probability and Uncertainty › Reliability and Agreement in Measurement
- Health Sciences › Health Professions › Medical Laboratory Technology › Clinical Laboratory Practices and Quality Control
- Social Sciences › Decision Sciences › Statistics, Probability and Uncertainty › Meta-analysis and systematic reviews
- Keywords
- method comparison, measurement agreement, limits of agreement, mean difference, repeatability, regression analysis, logarithmic transformation, repeated measures, nonparametric comparison, graphical method, confidence intervals
- MeSH terms
- Humans, Medical Laboratory Science, Reproducibility of Results, Confidence Intervals, Linear Models, Statistics, Nonparametric, Clinical Laboratory Techniques
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