Authors' objectives: Existing evidence demonstrates the benefits of integrated palliative care for people with cancer and their carers, for improved symptom burden, quality of life and appropriate healthcare resource use. The integration of palliative care and oncology has the potential to improve the quality of life and is recommended by international guidelines. However, it is not yet consistent practice. There are many approaches to integration, but it is unclear what works, for whom and in what contexts to achieve the best possible outcomes for people with cancer, carers and healthcare systems. To conduct a realist synthesis to develop a programme theory of how integrated palliative care in cancer works, for whom and in what contexts to achieve improved symptom management and increased quality of life for people with cancer and their carers. To use the programme theory to coproduce, with stakeholders (e.g. patient and public involvement representatives, local, national, international content experts and multidisciplinary practitioners), guidance to inform delivery of best practice and guide future research.

Authors' results and conclusions: One hundred and sixty-four papers from 33 countries were included in the review. Integrated palliative care and oncology could improve people with cancer’s outcomes, increase the goal-concordance of care and support workforce well-being. Interventions to support integration should be tailored to the context in which they are delivered. Ensuring the timely delivery of palliative care for people with cancer requires integration that overcomes siloes between oncology, specialist palliative care and primary and community care. The motivation to prioritise the integration of palliative care relies upon all stakeholders first understanding its value. Enriched interdisciplinary collaboration involves developing confidence in their own and their colleagues’ skillsets, facilitating co-ordination between care settings and supporting communication within and between teams. Supportive leadership could promote an institutional culture of acceptance of the value of integrating palliative care into oncology management. The success of integration is influenced by the ways in which palliative care is understood, prioritised, operationalised and measured within oncology. Through the synthesis of international evidence, this project draws on implementation science to contribute clarity on how integrated palliative care and cancer care can be achieved in practice.

Authors' methods: Realist review, conducted in accordance with Realist and Meta-narrative Evidence Synthesis: Evolving Standards. Evidence was identified through systematically searching academic databases and through stakeholder engagement. Data were extracted from included articles and were synthesised using a realist logic of analysis to develop explanations of how and why integrated palliative care in oncology works, for whom and in what contexts. The realist approach to analysis means that findings are based on our interpretation of the data. To manage the high volume of studies, we limited inclusion to documents published since 2010, using qualitative, mixed or economic methods; therefore, we may have excluded relevant documents.

Project Status: Completed

URL for project: https://www.journalslibrary.nihr.ac.uk/programmes/hsdr/NIHR152115

Year Published: 2026

URL for published report: https://www.journalslibrary.nihr.ac.uk/hsdr/GJJR3630

URL for additional information: English

English language abstract: An English language summary is available

Publication Type: Full HTA

Country: England, United Kingdom

DOI: 10.3310/GJJR3630

Organisation Name: NIHR Health Services and Delivery Research programme

Contact Address: NIHR Journals Library, National Institute for Health and Care Research, Evaluation, Trials and Studies Coordinating Centre, Alpha House, University of Southampton Science Park, Southampton SO16 7NS, UK

Contact Name: journals.library@nihr.ac.uk

Contact Email: journals.library@nihr.ac.uk