Minimal clinically important difference of commonly used hip-, knee-, foot-, and ankle-specific questionnaires: a systematic review

Abstract

Objective: Minimal clinically important difference (MCID) has become the most important psychometric factor for interpreting change in individual's responses over time from the patient's perspective, evaluating study results and planning sample sizes. The purpose was to synthesize and critically appraise MCID of the most frequently used hip-, knee-, foot-, and ankle-specific patient-reported outcomes (PROs).