Davis College of Agriculture, Natural Resources and Design
Human Nutrition and Foods
Background This paper describes the development, reliability, and convergent validity of a practical tool—the Convenience Store Supportive Healthy Environment for Life-Promoting Food (SHELF) Audit. Methods Audit items included: a variety of fresh, processed, and frozen fruits and vegetables; low-fat dairy products; healthy staples and frozen meals; healthy food incentive programs; items sold in check-out areas; portion/cup sizes; and pricing. Each audit item was scored using a five-point semantic-differential scale (1 = provides little or no support for healthful foods to 5 = provides high support for healthful foods). Convergent validity was examined by comparing the SHELF audit to Ghirardelli et al. and Laska et al. store audits. Statistical analysis included: Factor analysis, ANOVA, and Spearman correlations. Results SHELF included three factors: a Fruits/Vegetables scale (eight items, α = 0.79; total potential points = 34); a Healthy Foods scale (four items, α = 0.72; total potential points = 16); and a Supports scale (four items, α = 0.685; total potential points = 16). Only 6% of the 124 convenience stores assessed scored in the most healthful range (46–66). The assessed drug stores (n = 15) scored higher than convenience stores (n = 81) on the Healthy Foods and Supports scales but not the Fruits/Vegetables scale. The SHELF sub-scores were highly correlated with other audit tools indicating convergent validity. ConclusionThe SHELF convenience store audit is a valid, reliable tool for assessing the degree to which convenience stores support healthfulness regarding Fruits/Vegetables, Healthy Foods, and Supports for choosing healthy.
Digital Commons Citation
Horacek, Tanya M.; Yildrim, Elif Dede; Kelly, Erin; White, Adrienne A.; Shelnutt, Karla P.; Riggsbee, Kristin; Olfert, Melissa D.; Morrell, Jesse Stabile; Mathews, Anne E.; Mosby, Terezie T.; Kidd, Tandalayo; Kattelmann, kendra; Greene, Geoffrey; Franzen-Castle, Lisa; Colby, Sarah; Bryd- Bredbenner, Carol; and Brown, Onikia, "Development and Validation of a Simple Convenience Store SHELF Audit" (2018). Faculty & Staff Scholarship. 1304.
Horacek, T., Yildirim, E., Kelly, E., White, A., Shelnutt, K., Riggsbee, K., Olfert, M., Morrell, J., Mathews, A., Mosby, T., Kidd, T., Kattelmann, K., Greene, G., Franzen-Castle, L., Colby, S., Byrd-Bredbenner, C., & Brown, O. (2018). Development and Validation of a Simple Convenience Store SHELF Audit. International Journal of Environmental Research and Public Health, 15(12), 2676. https://doi.org/10.3390/ijerph15122676