Mental Health Reinforcement in Wayapi and Teko Communities in French Guiana : Evaluation of the Impact of a Mediation Based Activity in Municipalities of Camopi and Trois Saut in French Guiana (MCS Impact)

* Rational of the study

The mental health of Indigenous peoples is a major public health and social justice issue. Approximately 370 million Indigenous people live in more than 90 countries, sharing common experiences of historical exclusion, territorial dispossession, and socioeconomic marginalization. These structural determinants result in persistent health inequalities, including suicide rates that are frequently higher than national averages.

International data show significant variability-ranging from 0 to 187.5 suicides per 100,000 people -highlighting the importance of cultural and historical contexts. Ethnicity is not a risk factor in and of itself; vulnerabilities arise from the interaction between historical trauma, socioeconomic conditions, and local cultural dynamics.

The literature highlights three key factors:

• Structural vulnerability, linked to poverty, discrimination, and limited access to specialized services.
• Historical and intergenerational trauma linked to colonization, forced displacement, and assimilation policies, which contribute to mental health disorders.
• Resources for resilience: cultural continuity, local governance, and strong kinship networks.

International comparisons confirm that communities with territorial control, autonomous institutions, or adapted educational systems have significantly lower suicide rates.

The Amazon is a region particularly affected by inequalities in Indigenous mental health. Despite remarkable linguistic and cultural diversity, the region remains marked by the legacy of colonization, resource exploitation, missionary activity, and a chronic lack of health and educational infrastructure.

Available data indicate that suicide rates reach particularly high levels in several Amazonian contexts: up to twenty times the national average among the Guarani-Kaiowá in Brazil, 247.9 per 100,000 inhabitants among the Emberá Dobidá in Colombia, and rates higher than the national average in the Ecuadorian Amazon. These situations reflect the cumulative effect of structural, social, and historical vulnerabilities, the manifestation of which varies according to national and local contexts.

Although it is a department of a high-income country, French Guiana exhibits health inequalities comparable to those observed in low-resource settings. The Amazonian interior, accessible only by canoe or plane, suffers from significant geographic isolation, limiting access to specialized care.

In French Guiana, the municipality of Camopi, which includes the village of Trois-Sauts, has particularly high suicide rates, estimated at 113 and 137 per 100,000 inhabitants, respectively, with suicide attempt rates approaching 400 per 100,000 inhabitants. Suicides primarily affect young people aged 10 to 29, who account for more than 60% of suicide deaths, with an average age of 25 in the interior compared to 36 on the coast.

The observed vulnerabilities result from a complex interplay of factors: alcohol abuse and substance use disorders, domestic violence, a loss of identity due to rapid sociocultural changes, as well as the social and environmental impacts of illegal gold mining. These factors interact within a context of severe social precariousness and the erosion of community structures.

The concentration of psychiatric services in the prefecture and main French Guina town, Cayenne, the language barrier (with Wayãpi and Teko being the predominant languages), and the lack of interventions that are sustainably adapted to Indigenous contexts hinder the effectiveness of existing systems, exacerbating inequalities in access to and care for mental health.

Beyond socioeconomic and health determinants, the situations of psychological distress observed in Wayãpi and Teko communities are embedded in culturally situated frameworks of understanding. Representations of psychological distress, illness, and suicide are inseparable from a relational worldview in which bodily, social, territorial, and symbolic dimensions are closely intertwined.

In this context, psychological distress is not viewed exclusively as an individual disorder, but as an imbalance affecting the relationships between the individual, their social environment, and the symbolic frameworks mobilized to make sense of their lived experience. The failure to take these interpretive frameworks into account in healthcare systems constitutes an additional factor contributing to underutilization of services and the ineffectiveness of interventions.

In many countries, community health workers (CHWs) are a key lever for reducing health inequalities. Their cultural proximity facilitates early detection of health issues, language mediation, psychosocial support, and adherence to care.

In French Guiana, six Wayãpi and Teko Community Health Workers (CHWs) were deployed in 2025 in the municipalities of Camopi and Trois-Sauts. They serve as a bridge between so-called "traditional" medicine and allopathic medicine, facilitating access to care and the management of distressing situations.

Despite these advances, several gaps remain:

• A lack of standardized epidemiological data on the mental health of the Wayãpi and Teko peoples, aside from suicide mortality.
• Limited qualitative documentation, particularly regarding perceptions of suffering, addiction, and suicide.
• A complete lack of scientific evaluation of the role and impact of CHWs in French Guiana. Their effectiveness is assumed by analogy with the Brazilian model but has never been empirically verified.

These gaps hinder the development of appropriate prevention policies and keep the communities' real needs hidden. Three key findings emerge:

1. Indigenous peoples are disproportionately vulnerable to suicide, with significant variations depending on context.
2. The Amazon, and French Guiana in particular, is an area with a very high incidence of suicide.

3. CHWs represent a promising avenue, but require rigorous scientific evaluation.

   • Hypothesis of the study

     • The cultural and linguistic background of the CHWs, who come from the Wayãpi and Teko communities, fosters trust, improves communication, and facilitates access to care, thereby contributing to a reduction in suicidal behaviors.
     • The integration of cultural representations and traditional practices (Tupi-Guarani worldview, rituals, and symbols of suffering) into mediation strengthens individual and collective resilience in the face of mental health disorders.
     • The community mediation model, inspired by the Brazilian Agentes Indígenas de Saúde, is transferable and effective in French Guiana, provided it is adapted to local social, linguistic, and territorial specificities.
     • The close ties between CHWs and their communities are an essential resource for the early detection of crises, but can also lead to emotional overload, requiring appropriate supervision and support.
     • The introduction of CHWs has a measurable positive effect on social cohesion by strengthening community ties, reducing stigma, and facilitating the integration of biomedical care with traditional knowledge.
   • Design of the study

This is a single-center, quasi-experimental, prospective before-and-after study conducted in the municipality of Camopi (including Trois-Sauts).

• Retrospective phase: analysis of the 5 years preceding the introduction of MCS (aggregated data from institutional records).
• Inclusion: random selection of participants by drawing households at random from a georeferenced aerial map.
• Prospective phase: individual longitudinal follow-up over 30 months.
• Repeated assessments: M0, M12, M24, M30.

• Mixed-methods approach: standardized quantitative questionnaires (K10, AUDIT-C, WHO SUPRE-MISS/CIDI suicide module) and qualitative investigations (interviews, focus groups).

  * Objectives of the study

• Primary Objective To evaluate the effectiveness of the CHWs intervention in preventing suicide and reducing suicidal behaviors among the Wayãpi and Teko populations of Camopi and Trois-Sauts.
• Secondary Objectives

The secondary objectives aim to document the mechanisms, cultural dimensions, and social effects associated with the CHWs' intervention:

1. Estimate the prevalence of psychological distress and alcohol use among the Wayãpi and Teko communities.
2. Estimate the use of psychiatric health care services.
3. Describe cultural representations of distress, suffering, and suicide, as well as the relational and cosmological dynamics mobilized to account for them.
4. Analyze the role of CHWs as an intercultural interface by documenting how they integrate traditional practices with biomedical care.
5. Assess the perceived impact of CHWs on social cohesion, the reduction of stigma, and the strengthening of community support resources.

6. Identify the needs, limitations, working conditions, and burnout factors among CHWs, in order to evaluate the feasibility, sustainability, and conditions for the effectiveness of the program.

   • Benefits

The expected benefits apply to communities, health institutions, and scientific knowledge alike.

For the Wayãpi and Teko communities:

• improved access to care and early detection of distress
• reduction of stigma related to mental health
• strengthening of social cohesion and the integration of traditional healing with biomedicine.

For institutional stakeholders:

• unprecedented epidemiological data enabling the adaptation of suicide prevention strategies
• support for the implementation of a structured model of intercultural intervention based on the work of the CHWs
• improved training for professionals on intercultural approaches.

For research:

• generation of the first quantitative and qualitative data on the mental health of the Wayãpi and Teko
• development of a methodological framework that can be applied in other Amazonian context