Minimal important clinical difference in health-related quality of life

Abstract

One of the limitations for the use of Health-related Quality of Life Questionnaires and the results reported by patients is the difficulty of interpreting the values obtained. The minimal important clinical difference is a measure that helps to understand the results of these questionnaires and assess the clinical relevance of the effect achieved by the intervention performed.

In this paper, we review the concept of minimal important clinical difference, describe the methods used to obtain it, and expose its difficulties, limitations, and applicability.

Within the results reported by patients, and particularly in quality of life, the minimal important clinical difference is a tool that helps clinicians to correctly use the measurement scales and interpret the effect of the interventions. With this article, we hope to facilitate the implementation and use of the minimal important clinical difference and the Health-related Quality of Life Questionnaires in routine practice with our patients.