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Background . The aim of the study is to determine how the food store environment modifies the effects of an intervention on diet among low-income women.  Study Design . A 16-week face-to-face behavioral weight loss intervention was delivered among low income midlife women.   Methods . The retail food environment for all women was characterized by (1) the number and type of food stores within census tracts; (2) availability of healthy foods in stores where participants shop; (3) an aggregate score of self-reported availability of healthy foods in neighborhood and food stores.  Statistical Analyses . Multivariable linear regression was used to model the food store environment as an effect modifier between the intervention effect of fruit and vegetable serving change.  Results . Among intervention participants with a low perception of availability of healthy foods in stores, the intervention effect on fruit and vegetable serving change was greater [1.89, 95% CI (0.48, 3.31)] compared to controls. Among intervention participants residing in neighborhoods with few super markets, the intervention effect on fruit and vegetable serving change was greater [1.62, 95% CI (1.27, 1.96)] compared to controls.  Conclusion . Results point to how the food store environment may modify the success of an intervention on diet change among low-income women.

Food Store Environment Modifies Intervention Effect on Fruit and Vegetable Intake among Low-Income Women in North Carolina