The minimally important difference (MID) is "the average change in the domain of interest on the target measure among the subgroup of people deemed to change a minimal (but important) amount according to an 'anchor'" [1]. The MID is used to determine if statistically significant group change is also large enough to be clinically meaningful. It is an additional consideration when interpreting group differences because very trivial differences can be statistically significant when the sample size is large.
https://juniperpublishers.com/jojs/pdf/JOJS.MS.ID.555552.pdf
https://juniperpublishers.com/jojs/JOJS.MS.ID.555552.php
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