The psychometric properties of the Illness Management and Recovery scale in a large American public mental health system.

The Illness Management and Recovery (IMR) scale was created to measure recovery outcomes produced by the IMR program. However, many other mental health care programs are now designed to impact recovery-oriented outcomes, and the IMR has been identified as a potentially valuable measure of recovery-oriented mental health outcomes. The purpose of this study was to examine the psychometric properties and structural validity of the IMR clinician scale within a variety of therapeutic modalities other than IMR in a large multiethnic sample (N=10,659) of clients with mental illness from a large U.S. county mental health system. Clients completed the IMR on a single occasion. Our estimates of internal consistency were stronger than those found in previous studies (α=0.82). The scale also related to other measures of theoretically similar constructs, supporting construct and criterion validity claims. Additionally, confirmatory factor analyses supported the multidimensional representation of the IMR clinician scale. The three-factor model of illness self-management and recovery was represented by dimensions of recovery, management, and substance use. These reliable psychometric properties support the use of both the original one-factor and revised three-factor models to assess illness self-management and recovery among a broad spectrum of clients with mental illness.