Suitable instruments to measure health-related quality of life for individuals experiencing mental health difficulties are needed. Lack of appropriate instruments undermine the findings of cost-effectiveness studies and health care decision making. The aim of this paper is to report on the feasibility, acceptability and responsiveness of the Clinical Outcomes in Routine Evaluation-Outcome Measure (CORE-OM), as a quality of life measure to be used in cost-effectiveness studies in people with mental health difficulties. A feasibility study was conducted to evaluate social farming and other community services for adult offenders as part of probation services in England. The CORE-OM measure was tested for completeness, acceptability and responsiveness. We assessed whether utility values can be generated using the CORE-6D instrument. Of the 134 participants, 19 (14%) requested clarifications from the research assistant to complete the CORE-OM questionnaire. Missing data did not exceed 5% for any of the CORE-6D items both at baseline and follow-up. Response distribution showed that all response categories were used for CORE-6D items at baseline, with no obvious floor or ceiling effects. No challenges were encountered while deriving utility values using the CORE-6D instrument. CORE-OM is a valid and acceptable instrument to evaluate quality of life for people with mental health problems. More research is needed to compare CORE-6D with other health-related quality of life instruments to provide guidance on which instrument could be used for subgroups of people with mental health difficulties when carrying out cost-effectiveness analyses.
Wickramasekera, N., & Tubeuf, S. (2023). Measuring quality of life for people with common mental health problems. Journal of Mental Health, 32(1), 3-10. https://doi.org/10.1080/09638237.2020.1818190 (Original work published 2023)