The MID: If You Don’t Know, Now You Know! .
OrthoEvidence Journal (OE Journal) - OE Original
OE Journal. 2019;7(4):1The minimal important difference (MID) helps clarify whether a change in a patient-reported outcome is meaningful from the patient’s perspective, rather than just statistically significant. While distribution-based methods rely on statistics, anchor-based approaches link score changes to something patients can easily judge, such as feeling “a little improved.” This distinction matters because large trials can show statistically significant yet clinically trivial differences. When results are interpreted against an established MID, the true value of a treatment becomes clearer. Despite its importance, MIDs are often missing due to limited awareness, lack of established thresholds, or concern that reporting them may temper enthusiasm for statistically positive findings.
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