Abstract
Purpose
Some non-Western immigrant groups in Europe have elevated risk of psychosis relative to native-born. It is hypothesized that neighborhood ethnic density moderates this risk. Immigration to Sweden has increased substantially recently, particularly from the Middle East. This study examined the relationship between neighborhood ethnic density (i.e., living in an immigrant enclave) and risk of psychotic and affective disorders among three groups: Iraqi immigrants, immigrants from other nations, and native-born Swedes.
Methods
Individuals aged 15–60, without prevalent psychopathology, were drawn from Swedish population-based registries and followed from 2005 to 2010 (N = 950,979). Multi-level logistic regression was used to examine the association between neighborhood ethnic composition and incident psychopathology.
Results
Cumulative incidence of psychopathology was greater in Iraqi enclaves relative to predominantly Swedish neighborhoods (6.3 vs. 4.5 %). Iraqis living in enclaves did not have significantly greater risk of psychosis (Odds Ratio (OR): 1.66, 95 % Confidence Interval (CI) 0.92–2.97) or affective disorders (OR: 1.04, 95 %CI 0.85–1.27) relative to those in predominantly Swedish neighborhoods. There was no increased risk of psychosis (OR: 0.93, p > 0.05) or affective disorders (OR: 0.93, p > 0.05) for other immigrants living in an enclave. Swedes living in an enclave had elevated risk of both psychosis (OR: 1.37, p < 0.05) and affective disorders (OR: 1.14, p < 0.05) relative to those in predominantly Swedish neighborhoods. Second-generation Iraqis had higher risk of psychotic but not affective disorders relative to first-generation.
Conclusions
Neighborhood ethnic density does not moderate risk of psychopathology for immigrants in Sweden. Findings regarding Swedes are consistent with social drift.
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Acknowledgments
This work was supported by grants from the National Institute of Diabetes and Digestive and Kidney Diseases (R21-DK8356430) and National Institute of Mental Health (K01-MH093642) to Briana Mezuk, the Swedish Research Council to Kristina Sundquist (2011-3340), the Swedish Research Council to Jan Sundquist (2012-2378), the Swedish Research Council for Health, Working Life and Welfare to Kristina Sundquist and Jan Sundquist (In Swedish: Forte). The sponsors had no role in the design, interpretation, or publication of this manuscript. Research reported in this publication was also supported by the National Heart, Lung, And Blood Institute of the National Institutes of Health under Award Number R01HL116381. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health. The authors would also like to acknowledge Kristen Rice, MPH for her contributions to this project.
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Mezuk, B., Li, X., Cederin, K. et al. Ethnic enclaves and risk of psychiatric disorders among first- and second-generation immigrants in Sweden. Soc Psychiatry Psychiatr Epidemiol 50, 1713–1722 (2015). https://doi.org/10.1007/s00127-015-1107-1
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DOI: https://doi.org/10.1007/s00127-015-1107-1