Stress grounded in experiences of racial discrimination: a cluster analysis among a racially diverse sample in Canada

Eur J Psychotraumatol. 2026 Dec;17(1):2611511. doi: 10.1080/20008066.2025.2611511. Epub 2026 Jan 29.

Abstract

Background and Objective: Previous studies have shown that experience of racial discrimination is associated with increased mental health problems, especially stress. Using a cluster analytical procedure, the current study aimed to examine stress characteristics related to racial discrimination in individuals from diverse racial identities.Method: In total, 4220 participants completed the questionnaires assessing stress, resilience, everyday racial discrimination, and experience of major racial discrimination. K-means cluster analysis was performed to cluster participants' features regarding stress, resilience, everyday racial discrimination, and major racial discrimination. To determine the optimal number of clusters, the gap statistic was employed. Extracted clusters were then compared across racial groups using chi-square tests.Results: Cluster analysis revealed a three-cluster solution, including 'low stress', 'stress cluster with high racial discrimination', and 'stress cluster with low racial discrimination' clusters. Concerning the race-differences, Black (32.57%) and Indigenous (33.63%) participants had higher membership in the stress cluster with high racial discrimination compared to other racialized groups. Regarding the stress cluster with low racial discrimination, a higher membership was observed among Arab participants (30.82%) and those with other racial identities (30.40%) compared to other racialized groups.Conclusions: The findings demonstrate a type of stress characterized by high levels of racial discrimination and accompanying psychosocial burdens. Implications for intervention, prevention, and future research are discussed in the paper.

Antecedentes y objetivo: Estudios previos han señalado que la experiencia de discriminación racial está asociada con aumento en problemas de salud mental, especialmente estrés. Utilizando un análisis de clústeres, el presente estudio tuvo como objetivo examinar las características del estrés relacionadas con discriminación racial en individuos de diversas identidades raciales.

Métodos: En total, 4.200 participantes completaron los cuestionarios evaluando estrés, resiliencia, discriminación racial del día a día y experiencias de discriminación racial mayor. Se realizó un análisis de clústeres mediante k-means para agrupar las características de los participantes relacionadas con estrés, resiliencia, discriminación racial del día a día y experiencias de discriminación racial mayor. Para determinar el número óptimo de clústeres se utilizó el estadístico de brecha (gap statistic). Los clústeres extraídos se compararon entre los distintos grupos raciales mediante pruebas de chi-cuadrado.

Resultados: El análisis de clústeres reveló una solución de tres clústeres, incluyendo ‘bajo estrés’, ‘clúster de estrés con alta discriminación racial’ y ‘clúster de estrés con baja discriminación’. En cuanto a las distintas razas, los participantes de raza negra (32,57%) e indígena (33,63%) tuvieron una mayor pertenencia al clúster de estrés con alta discriminación racial, comparado con otros grupos racializados. Respecto al clúster de estrés con baja discriminación racial, se observó una mayor pertenencia entre participantes de raza árabe (30,82%) y participantes con otra identidad racial (30,40%), en comparación con otros grupos racializados.

Conclusiones: Los hallazgos demuestran un tipo de estrés caracterizado por altos niveles de discriminación racial y carga psicosocial acompañante. Las implicancias para la intervención, prevención e investigaciones futuras son discutidas en este artículo.

Keywords: Canada; Canadá; Estrés; Stress; discriminación racial; individuos racializados; racial discrimination; racialized individuals; racism; racismo.

Plain language summary

Cluster analysis revealed a three-cluster solution, including ‘low stress’, ‘stress cluster with high racial discrimination’, and ‘stress cluster with low racial discrimination’ clusters.Black and Indigenous participants were more likely to belong to the stress cluster with high racial discrimination compared to other racialized groups.Recognizing stress patterns driven by high levels of racial discrimination may help clinicians distinguish them from other types of stress and provide interventions that directly address the unique psychological and social impacts of discriminatory experiences.

MeSH terms

  • Adult
  • Canada
  • Cluster Analysis
  • Female
  • Humans
  • Male
  • Middle Aged
  • Racial Groups*
  • Racism* / psychology
  • Racism* / statistics & numerical data
  • Resilience, Psychological*
  • Stress, Psychological* / ethnology
  • Stress, Psychological* / psychology
  • Surveys and Questionnaires
  • Young Adult