Abstract
Background: Over the last several years, homelessness has increased in Ireland and across Europe. Rates have recently declined since the coronavirus disease 2019 (COVID-19) pandemic, but it is unclear whether emergency housing measures will remain in place permanently. Populations experiencing long-term homelessness face a higher burden of multi-morbidity at an earlier age than housed populations and have poorer health outcomes. However, this population also has more difficulty accessing appropriate health services. A realist review by the authors found that important health system contexts which impact access are resourcing, training, funding cycles, health system fragmentation, health system goals, how care is organised, culture, leadership and flexibility of care delivery. Using a realist evaluation approach, this research will explore and refine key system-level factors, highlighted in our realist review, in a local health care system. Aim: The aim of this study is to understand how funding procedures and health system performance management impact service settings, staff, providers and their ability to make services accessible to populations experiencing homelessness. Methods: A realist evaluation will be undertaken to explain how funding and health system performance management impact healthcare accessibility for populations experiencing homelessness. Data will be collected using qualitative and realist interview techniques and focus group methodology. Secondary data such as policy documents and budgets will utilised. The analysis will follow Pawson and Tilley's iterative phases starting with building an Initial programme theory, then data collection, data analysis, synthesis and finally building a refined programme theory. Conclusion: Building on a realist review conducted by the same research team, this study will further test and refine findings that explain how health system factors impact healthcare accessibility for populations experiencing homelessness. The study has the potential to inform policy makers, health planners and managers of contextual factors that can be modified to increase healthcare accessibility.