Barriers and enablers of integrated care in the UK: a rapid evidence review of review articles and grey literature 2018–2022

Integrated care refers to person-centered and coordinated, health and social care, and community services. Integrated care systems are partnerships of organizations that deliver health and care services which were placed on a statutory footing in England, April 2022. Due to the need for fast, accessible, and relevant evidence, a rapid review was conducted according to World Health Organization methods to determine barriers and enablers of integrated care across the United Kingdom, 2018–2022. Nine databases were searched for review articles reporting evaluation of integrated care interventions involving medical (clinical and diagnostic) and nonmedical (public health services and community-based or social care/person-centred care) approaches, quality checked with the Critical Appraisal Skills Program qualitative checklist. OpenGrey and hand searches were used to identify grey literature, quality checked with the Authority, Accuracy, Coverage, Objectivity, Date, and Significance checklist. Thirty-four reviews and 21 grey literature reports fitted inclusion criteria of adult physical/mental health outcomes/multiple morbidities. Thematic analysis revealed six themes (collaborative approach; costs; evidence and evaluation; integration of care; professional roles; service user factors) with 20 subthemes including key barriers (cost effectiveness; effectiveness of integrated care; evaluation methods; focus of evidence; future research; impact of integration) and enablers (accessing care; collaboration and partnership; concept of integration; inter-professional relationships; person-centered ethos). Findings indicated a paucity of robust research to evaluate such interventions and lack of standardized methodology to assess cost effectiveness, although there is growing interest in co-production that has engendered information sharing and reduced duplication, and inter-professional collaborations that have bridged task-related gaps and overlaps. The importance of identifying elements of integrated care associated with successful outcomes and determining sustainability of interventions meeting joined-up care and preventive population health objectives was highlighted.