Neighborhood Socioeconomic Status and Stroke Incidence: A Systematic Review

Objective To summarize overall patterns of the impact of neighborhood socioeconomic status (nSES) on incidence stroke and uncover potential gaps in the literature, we conducted a systematic review of studies examining the association between nSES and incident stroke, independent of individual socioeconomic status (SES).

Methods Four electronic databases and reference lists of included articles were searched, and corresponding authors were contacted to locate additional studies. A keyword search strategy included the three broad domains of neighborhood, SES, and stroke. Eight studies met our inclusion criteria (e.g., nSES as an exposure, individual SES as a covariate, and incident stroke as an outcome). We coded study methodology and findings across the eight studies.

Results The results provide evidence for the overall nSES and incident stroke association in Sweden and Japan, but not within the United States. Findings were inconclusive when examining the nSES-incident stroke association stratified by race. We found evidence for the mediating role of biological factors in the nSES-incident stroke association.

Conclusions Higher neighborhood disadvantage was found to be associated with higher stroke risk, but it was not significant in all the studies. The relationship between nSES and stroke risk within different racial groups in the United States was inconclusive. Inconsistencies may be driven by differences in covariate adjustment (e.g., individual-level sociodemographic characteristics, neighborhood-level racial composition). Additional research is needed to investigate potential intermediate and modifiable factors of the nSES and incident stroke association, which could serve as intervention points.