Schluter PJ. Bayese`s multi-arched hierarchical approach to measuring concordance in comparison studies of repeated measurement methods. BMC Med Res Methodol. 2009;9 (1):6. Carrasco JL, Caceres A, Escaramis G, Jover L. Distinction and compliance with continuous data. Stat Med. 2014;33 (1):117-28. Haber M, Gao J, Barnhart HX. Analysis of the concordance between measurement methods from data with repeated measurements consistent with the individual conformity coefficient.

J Data Sci. 2010;8( 3:457. than the variance due to the random part (sigma} {{{alpha} ^2+ {sigma} }^2+ {sigma} }{alpha gamma} ^2+ {sigma}__{alpha beta}2+ {sigma}} };beta gamma the variance due to the fixed factor (device) (phi}}}2={{j=1}^2{beta}_j^2 ), which explains the systematic differences between the two devices. If the latter term is not included, the consistency between the devices is measured and not their concordance. The overall variance is then ( {sigma}_{alpha}2+ {\phi} }^2+ {sigma} _{gamma} ^2+ {sigma} _alpha gamma 2+ {sigma}_{alpha beta}^2+ {sigma}}_{beta gamma}^2+ {sigma} _{varepsilon}^2. ) Bland JM, Altman DG. Statistical methods for assessing conformity between clinical measurement methods. Lanzette.

1986;327:307–10. To calculate the CP in practice for our COPD example, we first use the Mixed Effects linear model in (2) to calculate the mean square deviation, which is the expected quadratic difference between the measurements of two different devices on the same person that simultaneously perform the same activity: Stevens et al. [14, 29] developed the agreement probability (PoA) method as an alternative to the compliance limits approach, this has the advantage of taking into account two different types of distortions and uneven accuracy between the devices. Proportional distortion, in which the extent of disagreement depends on the actual value in each area, is taken into account in addition to additive distortion, and this information can be used to clarify the different sources of disagreement if the devices do not match. The PoA method offers a flexible and informative summary of compliance, but currently the methodology does not adapt to disruptive factors (e.g. B activity in our COPD study) and is therefore not yet as widespread as other alternatives. You can find more details about this method in the add-on file. . .