An umbrella review of intersectoral and multisectoral approaches to health policy.

Despite the widespread acceptance of the need for intersectoral and multisectoral approaches, knowledge around how to support, achieve, and sustain multisectoral action is limited. While there have been studies that seek to collate evidence on multisectoral action with a specific focus (e.g., Health in All Policies [HiAP]), we postulated that successes of working cross-sectorally to achieve health goals with one approach can glean insights and perhaps translate to other approaches which work across sectors (i.e., shared insights across HiAP, Healthy Cities, One Health, and other approaches). Thus, the goal of this study is to assemble evidence from systematic approaches to reviewing the literature (e.g., scoping review, systematic review) that collate findings on facilitators/enablers of and barriers to implementing various intersectoral and multisectoral approaches to health, to strengthen understanding of how to best implement health policies that work across sectors, whichever they may be. This umbrella review (i.e., review of reviews) was informed by the PRISMA guidelines for scoping reviews, yielding 10 studies included in this review. Enablers detailed are: (1) systems for liaising and engaged communication; (2) political leadership; (3) shared vision or common goals (win-win strategies); (4) education and access to information; and (5) funding. Barriers detailed were: (1) lack of shared vision across sectors; (2) lack of funding; (3) lack of political leadership; (4) lack of ownership and accountability; and (5) insufficient and unavailable indicators and data. These findings provide a rigorous evidence base for policymakers to inform intersectoral and multisectoral approaches to not only aid in the achievement of goals, such as the Sustainable Development Goals, but to work towards health equity.