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Secondary sources will include data collected and materials produced by the researchers developing the intervention.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Participants<\/jats:title>\n                    <jats:p>Aged care recipients; family members and significant others; direct care workers; managers; and other healthcare professionals will be engaged as co\u2010designers of the intervention, and as research participants in the evaluation of its co\u2010design and implementation.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Main Variables Studied<\/jats:title>\n                    <jats:p>Evaluation findings will compare experiences of co\u2010design, within and across informant groups, with an explanatory theoretical model of change described in previous research employing EBCD. Additionally, the role of the co\u2010design and other contextual factors in the intervention's impact will be organised using the RE\u2010AIM (Reach, Efficacy, Adoption, Implementation and Maintenance) framework.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Discussion<\/jats:title>\n                    <jats:p>The involvement of people who use and deliver health services in the development of complex interventions is increasingly recommended as a means to improve impact and health outcomes. However, research evidence supporting the mechanisms of impact of co\u2010design and related approaches in healthcare is limited.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Nested process evaluations of co\u2010design are needed to support the continued theoretical and methodological development and resourcing of co\u2010design in healthcare.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Patient or Public Contribution<\/jats:title>\n                    <jats:p>A lived experience advisory group (LEAG) of older people receiving aged care services and family or other informal supporters of those receiving aged care services has provided input to the evaluation design described in this manuscript, and a member of this group has co\u2010authored this article. LEAG members will continue to contribute to the conduct of the evaluation as well as the analysis and dissemination of the evaluation findings.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/hex.70782","type":"journal-article","created":{"date-parts":[[2026,7,25]],"date-time":"2026-07-25T07:22:39Z","timestamp":1784964159000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Evaluating the Co\u2010Design and Implementation of a Multicomponent Intervention to Improve Communication in Aged Care: A Nested Process Evaluation Protocol"],"prefix":"10.1111","volume":"29","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9430-9804","authenticated-orcid":false,"given":"Alicia J.","family":"King","sequence":"first","affiliation":[{"name":"The ALIVE National Centre for Mental Health Research Translation The University of Melbourne Melbourne Australia"},{"name":"The Department of General Practice and Primary Care, 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