Objectives:
     
     The aim was to synthesize evidence on the use of person-centered outcome measures to facilitate integrated palliative care for older people and build a logic model depicting the mechanisms through which person-centered outcome measures support integrated care.
   

Design:
     
     Mixed methods systematic review using a data-based convergent synthesis design.
   

Setting and participants:
     
     Older people aged ≥60 years who are approaching the end of their lives in multiple settings.
   

Methods:
     
     The study was underpinned by a conceptual framework of integrated palliative care, which informed the search strategy, data extraction, analysis, and synthesis. A hybrid search strategy was implemented, with database searches (PsycINFO, MEDLINE, CINAHL, and ASSIA) complemented by snowball searches. Qualitative and quantitative data were analyzed by narrative synthesis to summarize and explain the findings. The findings informed a logic model depicting the mechanisms of using person-centered outcome measures to support integrated palliative care.
   

Results:
     
     Twenty-six studies were included. Three mixed methods studies, 2 qualitative studies, and 21 quantitative studies were included. There was evidence that person-centered outcome measures could support integrated palliative care through informing palliative care policy development (n = 4), facilitating joint working across settings (n = 5), enabling close collaboration of multidisciplinary teams (n = 14), promoting joint education (n = 1), facilitating timing and specialist referral (n = 6), and enhancing patient-centered care (n = 3).
   

Conclusions and implications:
     
     This review makes an important, novel, and theoretically informed contribution to the delivery of scalable and sustainable integrated palliative care into the care of older people using person-centered outcome measures. The constructed logic model provides a conceptual framework and practical approach to how person-centered outcome measures support multilevel integration. A future area of research is the development of person-centered outcome measure interventions informed by the logic model to meet clinical needs.