Responsiveness of the anxiety/depression dimension of the 3- and 5-level versions of the EQ-5D in assessing mental health

Background Anxiety and depression disorders are associated with significantly lower health-related quality of life (HRQL). The EQ-5D is a commonly used generic measure of HRQL; it captures mental health through a single domain—the anxiety/depression dimension. Evidence on the responsiveness of this measure in assessing changes in mental health changes is limited.