Addressing Systemic Inequalities: Targeted Social and Economic Interventions for Marginalised Groups with Mental Ill-Health

The intersection of mental ill-health and socioeconomic disadvantage creates a complex clinical and social challenge that standard mental health services often fail to address adequately. Current mental health care models frequently underassess and poorly address the profound social and economic needs of patients, particularly those from marginalised communities. This gap is critical because social and economic adversities are not merely background factors; they are active drivers of mental health outcomes. For individuals belonging to marginalised groups—defined by ethnicity, housing instability, or economic hardship—these adversities are pronounced and often compounded by intersecting disadvantages. The lack of targeted interventions that specifically address these social determinants contributes to persistent ethnic inequalities and systemic barriers in care delivery.

Emerging evidence suggests that targeted social and economic interventions can effectively improve the circumstances of vulnerable populations. However, the existing literature base is highly heterogeneous, with little replication between studies, indicating a significant need for concentrated research efforts to replicate findings and strengthen the evidence base. This gap is especially pressing in the wake of global events like the COVID-19 pandemic and ongoing economic crises, which have disproportionately harmed marginalised groups. A systematic review of existing evidence reveals that while specific interventions show promise, the field requires a more rigorous, intersectional approach to ensure that support is culturally competent and responsive to the complex realities of those living with mental ill-health.

The Landscape of Social and Economic Adversity

Individuals experiencing mental ill-health frequently face severe social and economic disadvantages. These disadvantages are not isolated incidents but are deeply embedded in the social fabric, creating a cycle of exclusion. For people from marginalised groups, these adversities are further pronounced. The literature identifies three primary categories of marginalised populations that require specific attention: minority ethnic groups, individuals living in unstable housing or facing homelessness, and those experiencing economic hardship.

The concept of intersectionality is central to understanding these challenges. Intersectionality theory posits that social and economic adversities should not be conceptualised as separable when experienced together. The most marginalised individuals often face social exclusion across multiple domains simultaneously. For example, a person may be a member of a minority ethnic group while also facing homelessness and financial instability. The lack of consideration of experiences such as racism, complex trauma, and migration stress in the delivery of mental health services further exacerbates these inequalities. When mental health services fail to account for these intersecting factors, they inadvertently contribute to pervasive ethnic and socioeconomic disparities in care outcomes.

The global context has shifted dramatically, influencing the urgency of these interventions. The COVID-19 pandemic and subsequent economic crises have disproportionately impacted marginalised groups, worsening existing vulnerabilities. Studies indicate that these crises have deepened the gap between those with resources and those without, making targeted interventions even more critical. Despite this, there is currently no systematic evidence synthesis that comprehensively reviews targeted interventions addressing social and economic needs of marginalised groups living with mental ill-health. This absence creates a significant blind spot in the field, leaving clinicians and policymakers without a clear understanding of which interventions exist and for which specific communities.

Methodological Approaches to Evidence Synthesis

To address the lack of a comprehensive evidence base, researchers have employed rigorous systematic review methodologies to map the current landscape of interventions. The approach involved a two-stage systematic review designed to identify studies reporting targeted interventions for social and economic needs of marginalised groups. To avoid duplication of efforts, the search strategy built upon the foundational work of two recent, rigorous narrative reviews. These previous works provided a broad overview of social interventions but did not focus exclusively on the targeted nature of interventions for specific marginalised groups.

The search strategy was updated to reflect the changing global context, replicating original search strategies but focusing on literature published between January 2020 and February 2024. This timeframe captures the impact of the pandemic and economic shifts. However, a critical limitation in the current evidence base is the restriction to English-language, peer-reviewed journals. This restriction likely overlooks vital interventions evaluated in non-English-speaking countries and those within the "grey literature"—reports from third-sector organisations and local authorities that often lack the resources to publish in formal journals. This highlights a broader problem in social intervention research: key providers of support struggle to contribute to the formal evidence base due to limited resources and day-to-day service demands.

The review aimed to identify interventions that were either adapted or developed bespoke for people from marginalised or minoritised sociodemographic or socioeconomic groups. The focus was on interventions that directly address social or economic needs, rather than generic mental health treatments. This distinction is crucial because standard therapies often fail to account for the specific barriers faced by marginalised communities. The goal was to narratively examine the types of interventions studied and their respective outcomes, thereby filling the gap in understanding what works for these specific populations.

Key Intervention Models and Outcomes

The systematic review identified a range of targeted interventions that have demonstrated feasibility, acceptability, and effectiveness. These interventions are designed to improve socioeconomic inclusion for marginalised groups. The evidence base was particularly strong for targeted interventions for people experiencing or at risk of homelessness. Housing First (HF) represented more than half of the included studies in this category. These studies reported replicated positive housing outcomes, demonstrating that bespoke interventions designed for specific needs are highly effective.

Another notable intervention model identified is the "befriender" approach. In this model, befriending partners are matched with participants based on shared interests and availability. The primary goal is to provide emotional and social support and to facilitate access to local activities. While befriending was found to be acceptable to participants, challenges in recruiting for larger Randomised Controlled Trials (RCTs) were observed, indicating potential feasibility issues for scaling up this specific intervention in a research context. This highlights the difficulty in balancing the relational nature of befriending with the rigid requirements of clinical trials.

The success of these interventions emphasizes the benefits of designing support that is tailored to the specific needs of a group. However, the literature base is highly heterogeneous. There is little replication between studies, meaning that many interventions are unique and have not been tested in multiple settings. This lack of replication makes it difficult to generalize findings across different contexts. Most studies were conducted in well-resourced, high-income settings, which may limit the generalizability of findings to low- and middle-income countries or underresourced settings.

The Critical Role of Intersectionality

A significant finding from the review is the scarcity of interventions that involve modifications for multiple marginalised characteristics simultaneously. Most studies focus on a single dimension of marginalisation, such as ethnicity or housing status. However, from an intersectional perspective, the most marginalised individuals experience social exclusion across multiple domains. Intersectionality theory, originating from the work of legal scholar Kimberlé Crenshaw, emphasizes that these adversities should not be conceptualized as separable when experienced together.

The current lack of interventions addressing multiple intersecting disadvantages is a critical gap. For instance, an intervention designed for homeless individuals might not account for the unique trauma and discrimination faced by a homeless individual from a racial minority group. The review notes that only a few of the identified interventions involved modifications for multiple marginalised characteristics, such as economic hardship, social roles, and demographics simultaneously. This oversight prevents the development of holistic care models that address the full complexity of the patient's reality.

Furthermore, the lack of consideration of experiences of racism, complex trauma, and migration stress in the delivery of mental health services contributes to pervasive ethnic inequalities. To truly address the needs of marginalised communities, future intervention development must integrate these dimensions. This requires moving beyond siloed approaches to create comprehensive support systems that acknowledge the overlapping nature of social and economic disadvantages.

Challenges in Evidence Generation and Generalizability

The path to establishing a robust evidence base for these interventions is fraught with challenges. The primary issue is the heterogeneity of the literature. With little replication between studies, it is difficult to draw definitive conclusions about the efficacy of various interventions across different settings. The findings warrant concentrated research efforts to replicate findings and ultimately strengthen the evidence base to enable widespread implementation.

Another significant challenge is the limitation of the existing research to English-language, peer-reviewed journals. This restriction excludes a vast amount of knowledge held by third-sector organisations and local authorities. These entities are often the primary providers of support in social domains but struggle to contribute to the evidence base due to limited resources and the demands of day-to-day service delivery. This creates a "grey literature" gap where valuable practical knowledge is lost because it is not published in formal academic journals.

Additionally, the context of most studies is limited to well-resourced, high-income settings. While the interventions showed strong feasibility and effectiveness in these contexts, it is unclear if these results are generalizable to low- and middle-income countries or underresourced settings. The economic and social infrastructure required to implement these interventions may not be present in developing nations. This limits the global applicability of the findings, particularly given that many marginalised communities exist in resource-poor environments.

Future Directions for Research and Practice

The review highlights the urgent need for concentrated research efforts to replicate findings and strengthen the evidence base. The goal is to move from isolated, bespoke interventions to scalable, evidence-based models that can be widely implemented. To achieve this, future research must prioritize intersectional designs that address multiple marginalised characteristics simultaneously. This approach aligns with the reality that social exclusion is rarely experienced in isolation.

Practitioners and policymakers must also recognize the limitations of the current evidence base. The lack of replication and the restriction to high-income settings mean that current findings should be applied with caution, particularly in different socio-economic contexts. There is a clear call for increased funding and support for third-sector organisations to document and evaluate their work, bridging the gap between grey literature and peer-reviewed evidence.

The findings ultimately suggest that targeted social and economic interventions can work towards addressing systemic inequalities present in mental health care. However, the path forward requires a commitment to rigorous, replicable research that accounts for the complex, intersecting nature of marginalisation. Only by addressing the root causes of social and economic disadvantage can mental health services hope to achieve equity for marginalised groups.

Comparative Analysis of Intervention Types

To visualize the scope and limitations of the interventions identified, the following table summarizes the key characteristics of the primary intervention models discussed in the systematic review.

The table above illustrates that while Housing First has a robust evidence base for housing outcomes, other interventions like befriending face recruitment challenges. Furthermore, the scarcity of intersectional models highlights the need for future research to focus on complex, overlapping disadvantages rather than single-factor interventions.

Conclusion

Targeted social and economic interventions represent a critical avenue for addressing the systemic inequalities that plague mental health care for marginalised communities. The evidence reviewed demonstrates that bespoke interventions, particularly those focused on housing stability, can yield significant positive outcomes. However, the current landscape is characterized by a highly heterogeneous literature base with limited replication and a narrow focus on high-income settings.

The pressing need is to develop and evaluate interventions that are truly intersectional, addressing the multiple, overlapping disadvantages faced by the most vulnerable individuals. This requires a shift from studying single factors to understanding the complex interplay of ethnicity, housing, and economic status. Additionally, the field must overcome the language and publication barriers that prevent valuable practical knowledge from third-sector organisations from entering the formal evidence base.

Ultimately, the findings underscore the potential utility of targeted interventions to improve socioeconomic inclusion. By strengthening the evidence base through replication and expanding the scope to include diverse, underresourced settings, the mental health community can move closer to achieving equity for all. The path forward demands a commitment to intersectional theory, rigorous research design, and the integration of social determinants into standard mental health care delivery.

Sources

1. Greenburgh et al. (2025). Targeted interventions to improve the social and economic circumstances of people with mental ill-health from marginalised communities: a systematic review. Psychological Medicine. Available at: https://www.cambridge.org/core/journals/psychological-medicine/article/targeted-interventions-to-improve-the-social-and-economic-circumstances-of-people-with-mental-illhealth-from-marginalised-communities-a-systematic-review/339F25D7A5DFAB100426F660AFA496E5