Associations between neighborhood disinvestment and breast cancer outcomes within a populous state registry

BACKGROUND: Breast cancer (BrCa) outcomes vary by social environmental factors, but the role of built‐environment factors is understudied. The authors investigated associations between environmental physical disorder—indicators of residential disrepair and disinvestment—and BrCa tumor prognostic factors (stage at diagnosis, tumor grade, triple‐negative [negative for estrogen receptor, progesterone receptor, and HER2 receptor] BrCa) and survival within a large state cancer registry linkage. METHODS: Data on sociodemographic, tumor, and vital status were derived from adult women who had invasive BrCa diagnosed from 2008 to 2017 ascertained from the New Jersey State Cancer Registry. Physical disorder was assessed through virtual neighborhood audits of 23,276 locations across New Jersey, and a personalized measure for the residential address of each woman with BrCa was estimated using universal kriging. Continuous covariates were z scored (mean ± standard deviation [SD], 0 ± 1) to reduce collinearity. Logistic regression models of tumor factors and accelerated failure time models of survival time to BrCa‐specific death were built to investigate associations with physical disorder adjusted for covariates (with follow‐up through 2019). RESULTS: There were 3637 BrCa‐specific deaths among 40,963 women with a median follow‐up of 5.3 years. In adjusted models, a 1‐SD increase in physical disorder was associated with higher odds of late‐stage BrCa (odds ratio, 1.09; 95% confidence interval, 1.02‐1.15). Physical disorder was not associated with tumor grade or triple‐negative tumors. A 1‐SD increase in physical disorder was associated with a 10.5% shorter survival time (95% confidence interval, 6.1%‐14.6%) only among women who had early stage BrCa. CONCLUSIONS: Physical disorder is associated with worse tumor prognostic factors and survival among women who have BrCa diagnosed at an early stage.