Lay summary
Changes to mental health legislation in Aotearoa necessitates responsiveness to the United Nations Convention on the Rights of Persons with Disabilities, which requires individuals being supported to make their own mental health treatment decisions in accord with their will and preferences. This is known as supported decision-making. Our health delivery research activation activity involved service users and providers identifying and prioritising supported decision-making interventions that have the potential to lead to the greatest improvements in mental health outcomes. Pre-event planning and post-event debriefing were strongly endorsed forms of intervention, particularly by stakeholders from Māori, Pasifika, family, and consumer worker perspectives. Our other foundational work has indicated that advance preference statements can successfully facilitate pre-event planning, especially at times when communicating will and preferences is difficult. This project will change practice in a way that will improve outcomes by developing, implementing, and evaluating advance care statements across various mental health services.