Cross-Sector Collaboration Emerges as a Key Lever for Advancing Health Equity

Most of what determines whether people live long, healthy lives lies far outside the walls of hospitals and clinics. Income, housing, education, employment conditions, and the political and economic systems that distribute them shape health outcomes long before anyone sees a physician. A new rapid scoping review published in BMC Public Health examines one of the most ambitious strategies public health has for reaching those upstream forces: intersectoral action, in which public health agencies work formally with sectors outside health, such as housing, education, transportation, and finance, to change the structural and social determinants that drive health inequities. The review, led by Nandini Saxena of the National Collaborating Centre for Determinants of Health at St. Francis Xavier University, updates a 2013 rapid review and offers a carefully documented snapshot of what this practice has actually achieved over the past decade.

The timing of the review is significant. The World Health Organization’s 2025 World Report on the Social Determinants of Health Equity acknowledged that while some progress has been made toward advancing health equity, that progress remains obstructed by inequitable economic, social, and political systems that reinforce existing power structures. In other words, the global health community has long understood that the roots of unequal health run deep into the architecture of society itself, yet the machinery for changing that architecture remains underdeveloped and, crucially, under-evaluated. The new review set out to answer a deceptively simple question: when public health collaborates across sectors to act on the determinants of health, what impacts are actually reported in the published literature?

Methodologically, the team conducted a rapid scoping review, a streamlined form of evidence synthesis designed to map the breadth of a research landscape rather than produce the exhaustive, quality-weighted estimates of a full systematic review. The researchers searched Ovid Medline and the Web of Science Social Sciences Citation Index for articles published between 2012 and 2024. To keep the evidence relevant to comparable high-income policy contexts, they restricted inclusion to studies from Norway, Finland, Denmark, Sweden, Australia, New Zealand, Canada, the United States, and the United Kingdom, written in English or French. The interventions of interest were specific: intersectoral initiatives undertaken by public health in collaboration with sectors outside of health, aimed at improving health equity through action on the structural or social determinants of health, and reporting related outcomes. The reporting followed the PRISMA-ScR extension, the recognized standard for transparent scoping reviews.

The yield was strikingly small. Eleven articles met the inclusion criteria: one systematic review and ten primary studies. For a field that has been championed in policy documents for decades, from the WHO Commission on Social Determinants of Health onward, the scarcity of published evaluations is itself a finding. The authors note that while there have been notable shifts since the 2013 review, there remain a limited number of published studies on this topic. That gap matters because intersectoral action is frequently promoted as a foundational public health practice; without documented outcomes, its promise risks resting on rhetoric rather than evidence.

What the eleven studies did report falls into several distinct categories, and the taxonomy the reviewers developed is one of the review’s most useful technical contributions. First, they identified reported actual and projected population health impacts, meaning changes in health outcomes or trajectories that studies attributed, at least in part, to intersectoral work. Second, they catalogued impacts on the structural determinants of health, a category that includes what the authors call policy and system wins, culture shift, and redistribution of power or an intent to redistribute it. This distinction is important: structural determinants are the governance, economic, and policy arrangements that generate social stratification in the first place, and changing them is a far more ambitious target than delivering services.

Third, the review documented reported impacts on the social determinants of health themselves, the everyday conditions in which people live, work, and age, such as housing quality, income security, and neighborhood environments. Fourth, and perhaps most practically, the reviewers identified tools that enable intersectoral action to succeed. Two enabling mechanisms stood out: authorizing environments and structured planning and implementation processes. An authorizing environment refers to the political and institutional space in which cross-sector collaboration is permitted, mandated, and resourced; without senior-level authorization, intersectoral initiatives tend to stall at the level of goodwill and informal networking. Structured planning and implementation, meanwhile, provides the operational scaffolding, shared goals, defined roles, and accountability mechanisms that convert collaboration into concrete policy change.

The review also situates its findings within a broader conceptual vocabulary that has become standard in health equity scholarship. The abbreviations that pepper the article’s methods reflect this infrastructure: HiAP, or Health in All Policies, describes the whole-of-government approach of systematically considering health in policy developed across all sectors; PSEI, or Policy, Systems, Environment and Infrastructure, frames the multiple levels at which public health interventions operate; and the Commission on Social Determinants of Health, whose landmark 2008 report galvanized the field, supplies the conceptual foundation for distinguishing structural from social determinants. The review was funded by the Public Health Agency of Canada through the National Collaborating Centre for Determinants of Health, with the funders participating as co-authors and advisory group members, an arrangement the authors disclose transparently.

For readers wondering why cross-sector work should be so consequential, the logic is worth spelling out. A public health agency cannot legislate affordable housing, set minimum wages, or design transit systems. Those levers sit with municipal planners, finance ministries, and transportation authorities. Yet each of those policy domains exerts measurable influence on morbidity and mortality. Intersectoral action is the practice of bringing public health’s evidence, equity lens, and population perspective into those decision-making arenas, so that policies affecting housing, income, or transport are designed with their health consequences in view. When such collaboration succeeds, the reported impacts can include new policies adopted, systems reorganized, and, at the deepest level, a shift in organizational culture and a redistribution of who holds power over the decisions that shape health.

The emphasis on power is one of the more candid aspects of the review. The authors report impacts described as culture shift and redistribution of power, or an intent to do so, language that acknowledges health inequity is not an accident of geography or individual behavior but a product of how societies organize resources and authority. The WHO’s 2025 report made the same point at the global scale, identifying inequitable economic, social, and political systems as the central obstacle to health equity. By documenting cases where intersectoral action has moved those systems, even incrementally, the review provides public health practitioners with concrete examples that such change is possible, alongside a framework for describing what success looks like beyond traditional health metrics.

Still, the review’s conclusions are appropriately measured. The authors characterize intersectoral action as a promising public health approach for advancing health equity, a deliberately cautious formulation that reflects both the encouraging signals and the thin evidence base. Eleven studies across nine countries and twelve years is a modest harvest, and the reviewers do not claim that the included studies establish effectiveness in the way a large body of randomized trials would. Instead, the review maps the terrain: it shows that reported impacts exist across population health outcomes, structural determinants, and social determinants, and it names the enabling conditions, authorizing environments and structured implementation, that appear to make those impacts attainable. For policymakers, the message is that cross-sector collaboration deserves investment not only as an aspiration but as an evaluated practice, with publication of outcomes treated as part of the work itself. For researchers, the scarcity of studies is an invitation: the field needs more rigorous, well-documented evaluations of intersectoral initiatives if the promise of acting on the determinants of health is ever to be matched by a commensurate body of evidence. The review, published open access with a comprehensive search strategy and study descriptions available as supplementary files, offers both a starting point and a challenge for the next decade of health equity research.

Subject of Research: Intersectoral action as a public health practice for advancing health equity through the structural and social determinants of health

Article Title: Reported policy impacts through intersectoral action as a public health practice for health equity: a rapid scoping review

Article References: Saxena, N., Mahar-Klassen, H., Warren, R., Abdalla, R., Lucyk, K., Kwan, A., Ndumbe-Eyoh, S., Botero, N. C., & Betker, C. (2026). Reported policy impacts through intersectoral action as a public health practice for health equity: a rapid scoping review. BMC Public Health. https://doi.org/10.1186/s12889-026-29449-9

Image Credits: AI Generated

DOI: 10.1186/s12889-026-29449-9

Keywords: health equity, intersectoral action, social determinants of health, structural determinants, public health, scoping review, Health in All Policies, policy impact, WHO, cross-sector collaboration, Reported, policy