Can the introduction of a full-service supermarket in a food desert improve residents' economic status and health?

Purpose: To estimate the impacts of a new supermarket in a low-income desert, on residents' economic status and health. Methods: We surveyed a randomly selected cohort in two low-income Pittsburgh neighborhoods before and about 1 year following the opening of a supermarket. We used difference-in-difference approach to test changes across the two neighborhoods in residents' food security, United States Department of Agriculture Supplemental Nutrition Assistance Program and Special Supplemental Nutrition Program for Women Infant and Children participation, employment, income, and self-reported health/chronic disease diagnoses. Results: We observed declines in food insecurity (-11.8%, P <.01), Supplemental Nutrition Assistance Program participation (-12.2%, P <.01), and fewer new diagnoses of high cholesterol (-9.6%, P =.01) and arthritis (-7.4%, P =.02) in the neighborhood with the new supermarket relative to residents of the comparison neighborhood. We also found suggestive evidence that residents' incomes increased more ($1550, P =.09) and prevalence of diabetes increased less in the neighborhood with the supermarket than in the comparison neighborhood (-3.6%, P =.10). Conclusions: Locating a new supermarket in a low-income neighborhood may improve residents' economic well-being and health. Policymakers should consider broad impacts of neighborhood investment that could translate into improved health for residents of underserved neighborhoods. (C) 2017 Elsevier Inc. All rights reserved.