Offering mental health first aid to a person experiencing psychosis: a Delphi study to redevelop the guidelines published in 2008

Background: Psychotic illnesses can have a major impact on those who experience them. Timely treatment for psychosis is important and friends, family members and the public can be a facilitating factor in social support and professional help-seeking. Expert consensus guidelines on how to provide mental health first aid to a person experiencing psychosis were developed in 2008. This Delphi study aimed to redevelop the guidelines to reflect current evidence. Methods: The Delphi consensus method was used to determine which helping strategies should be included in the redeveloped guidelines. A systematic search of grey and academic literature was undertaken to identify strategies on how a member of the public can assist someone experiencing psychosis. These strategies were organised into questionnaire statements. Two expert panels-one comprising people with lived experience (Carers and Consumers) and one of professionals-completed three consecutive rounds of online survey questionnaires to rate the importance of each helping statement for inclusion in the guidelines. Statements were included in the guidelines if they were endorsed by at least 80% of each panel. Results: The expert panels rated 515 statements across three rounds of surveys, with 325 statements meeting the criteria for inclusion in the redeveloped guidelines. 59 panel participants completed all three surveys. Conclusions: The redeveloped guidelines outline a general set of strategies for providing initial assistance to a person who is experiencing psychosis. Compared to the original guidelines, these redeveloped guidelines provide more detailed instruction for members of the public on how to provide mental health first aid to assist a person experiencing psychosis. The guidelines are available to the public and will be used to update the Mental Health First Aid courses.